in the film, paine recalls that a year after the starfish had been removed, the number of species decreased from 15 to eight, after three years the number went down to seven, and after another seven years it was almost all mussels. in the control plots the number and diversity of species was basically unchanged. which statement(s) best explain(s) these results? i. keystone species are critical to the diversity and stability of an ecosystem. ii. when a predator is removed, the prey of that predator will also decrease. iii. the disappearance of producers from an ecosystem can cause the number of predators to increase.
Answers
The first statement only, best explain(s) these results for the control plots the number and diversity of species was basically unchanged in keystone species are critical to the diversity and stability of an ecosystem.
An ecosystem refers to a community of living organisms that interact with each other and their physical environment in a specific geographic area. They are characterized by a complex web of relationships among different species, including producers, consumers, and decomposers.
Producers, such as plants, use energy from the sun to produce organic compounds that other organisms can use as food. Consumers, such as animals, feed on these producers or other consumers to obtain energy. Decomposers, such as bacteria and fungi, break down dead organic matter into its component parts, returning nutrients to the ecosystem. Ecosystems are not only home to a diverse array of species but also provide important services to human populations, such as clean water, air, and soil.
To learn more about Ecosystem visit here:
brainly.com/question/19267717
#SPJ4
Related Questions
if a portion of a transcription factors domain is the dame in a variety if irganisms it is called a motif. true or false
Answers
If a portion of a transcription factor's domain is the same in a variety of organisms, it is called a motif---- True
What is a motif?A motif is a recurring sequence of DNA or amino acids that occurs in various proteins and enzymes. Motifs are generally used in protein interactions and transcription factor binding, as well as other biological activities.
Some motifs are conserved across species, meaning they are identical or similar between organisms.Therefore, if a portion of a transcription factor's domain is the same in a variety of organisms, it is called a motif.
The DNA-binding domains of transcription factors often include motifs that bind to specific nucleotide sequences. These motifs are important for regulating gene expression, as well as other functions in the cell.
Learn more about Motif:
brainly.com/question/29482197
#SPJ11
Calculate the constant for an absorbance of 12.7, a concentration of 3.4, and a path length of 7.6. Round to 1 decimal place; if the answer is pure decimal (say, 0.1), type the leading zero in your answer (that is, 0.1 instead of .1).
Answers
Answer: Lower
Explanation:
The Beer-Lambert Law relates the absorbance of a solution to its concentration and path length:
A = εcl
Where:
A is the absorbance
ε is the molar absorptivity (a constant for a particular substance and wavelength)
c is the concentration in mol/L
l is the path length in cm
We can rearrange this equation to solve for ε:
ε = A / (cl)
Plugging in the given values, we get:
ε = 12.7 / (3.4 x 7.6)
ε ≈ 0.496
Rounding to 1 decimal place, the constant is approximately 0.5.
The constant for an absorbance of 12.7, a concentration of 3.4, and a path length of 7.6 is 0.5
To calculate the constant for an absorbance of 12.7, a concentration of 3.4, and a path length of 7.6, we can use the Beer-Lambert Law equation:
A = εlc
Where A is the absorbance, ε is the molar absorptivity or constant, l is the path length, and c is the concentration. Rearranging the equation to solve for ε, we get:
ε = A/(lc)
Plugging in the given values:
ε = 12.7 / (3.4 * 7.6)
ε = 0.49
Rounding to 1 decimal place, the constant is 0.5.
Therefore, the answer is 0.5.
Learn more about Beer-Lambert Law at https://brainly.com/question/30404288
#SPJ11
Which of the following statements is TRUE?
Paraplegia may occur when traumatic injury occurs along the upper vertebral column C1 to C7.
Quadriplegia may occur when traumatic injury occurs along the upper vertebral column C1 to C7.
Paraplegia is paralysis of everything below the neck.
None of the above
Answers
Answer:
b. Quadriplegia may occur when traumatic injury occurs along the upper vertebral column C1 to C7.
Explanation: is correct
Answer:
B
Explanation:
(thank you sunrise you've helped me with like 4 units now)
HELP ASP ILL GIVE BRAINILEST TO WHOEVER IS RIGHT AND 17 points
Answers
Bohr model and electron cloud model describes the position of electrons in an atom. Bohr model was given by Niels Bohr and electron cloud model was given by Erwin Schrödinger.
What are the similarities and dissimilarities between Bohr Model and Electron Cloud Model?Similarities: The basic idea of movement of electrons in a specific path is common in both the models without emitting energy.
Both the models shows that electrons have energy which depends upon quantum numbers.
Dissimilarities: The Bohr Model describes the particle-nature of electron while the electron cloud model describes the wave-nature of electron.
Bohr model tells about the specific path of an electron whereas the electron cloud model tells about the regions where the probability of finding an electron is highest.
Thus, the models explains about the stability of an atom with respect to the energy of an electron.
Learn more about electrons here:
https://brainly.com/question/2845051
#SPJ1
What is it called when a drug is no longer effective but organism is susceptible in vitro?
Answers
When a drug is no longer effective but an organism is susceptible in vitro, it is called intermediate.
What is it known as when a drug loses its effectiveness but an organism is still susceptible in vitro?When a bacterial strain is susceptible in vitro to a concentration of an antibiotic drug that is linked to a questionable therapeutic effect, it is said that the bacterium's sensitivity to that antibiotic is intermediate. Thus, When a drug is no longer effective but an organism is susceptible in vitro, it is called intermediate.The designation "intermediate" suggests that while the same antibiotic may not be sufficiently effective against the same organism if it is located in other places, such as the meninges, it may readily be eliminated in bodily compartments that are easily accessible by the medicine, such as the urinary tract.To learn more about susceptibility refer:
https://brainly.com/question/28169324
#SPJ4
What was NOT a key characteristic of the common ancestor of all life?a. It had DNA as its genetic codeb. It lacked complex compartmentalization and membrane-bound organellesc. It contained its DNA in a protected nucleusd. Through transcription and translation, its DNA made RNA which then coded for proteins
Answers
The correct option is C; It contained its DNA in a protected nucleusd. Because organisms share some crucial characteristics, there must have been one or a few universal common ancestor(s) of all species.
They consist of (one or more) cells, or rely on cells for reproduction; they exhibit the characteristic properties of life (metabolism, reproduction, homeostasis, etc.),... All known life forms can be traced back to a last universal common ancestor (LUCA) who lived during the beginning of Darwinian evolution. The most common way to ask questions about LUCA is to look for traits that are shared by all cells, such as ribosomes or the genetic code.
Learn more about DNA
https://brainly.com/question/264225
#SPJ4
!will give brainliest! select the topics an epidemiologist would study.
public health
biology
geoscience
biostatistics
physics
chemistry
Answers
An epidemiologist's goal is to use scientific research to identify and mitigate health risks, promote health equity, and improve overall population health.
As an epidemiologist, one would study a range of topics related to public health. These could include infectious diseases, chronic diseases, environmental health, social determinants of health, and healthcare access and utilization.
To understand these topics, an epidemiologist would draw on a range of fields, including biology, geoscience, biostatistics, and chemistry. They might also use physics to understand how diseases spread through the environment or how different healthcare interventions affect health outcomes.
Ultimately, an epidemiologist's goal is to use scientific research to identify and mitigate health risks, promote health equity, and improve overall population health.
To know more about epidemiologist :
https://brainly.com/question/28859445
#SPJ11
a urinometer or a refractometer is used to measure the ________ of urine.
Answers
A urinometer or a refractometer is used to measure the specific gravity of urine.
The specific gravity of urine is a measurement of its density relative to the density of water.
It helps determine the concentration of dissolved particles, such as salts and other compounds, in the urine.
A urinometer and a refractometer are two common instruments used to measure the specific gravity of urine, with the former relying on buoyancy and the latter on light refraction.
Summary: Both a urinometer and a refractometer are used to measure the specific gravity of urine, which provides information about the concentration of dissolved particles in the sample.
Learn more about gravity click here:
https://brainly.com/question/940770
#SPJ11
What are encapuslated dendritic endings? (Structural complexity)
Answers
Encapsulated dendritic endings are specialized nerve endings found throughout the body that play a crucial role in our ability to sense touch, pressure, and vibration. Their complex structure allows them to detect even subtle changes in stimuli and provides important information to the brain about our environment.
Encapsulated dendritic endings refer to a type of sensory receptor found within the skin and other tissues of the body. These specialized nerve endings are responsible for detecting various types of stimuli, including pressure, vibration, and touch.
The term "encapsulated" refers to the fact that these dendritic endings are surrounded by specialized connective tissue sheaths. These sheaths serve to protect the nerve endings and enhance their sensitivity to stimuli.
Encapsulated dendritic endings are known for their structural complexity. They typically consist of a nerve fiber surrounded by one or more layers of connective tissue. This layered structure helps to focus and amplify sensory signals, allowing the nerve endings to detect even subtle changes in stimuli.
There are several types of encapsulated dendritic endings, each specialized for detecting different types of stimuli. For example, Meissner's corpuscles are found in the skin of the fingers and are particularly sensitive to light touch and vibration, while Pacinian corpuscles are found in deeper tissues and are more sensitive to pressure.
Learn more about Encapsulated dendritic endings here:-
https://brainly.com/question/29376394
#SPJ11
the presence of spots on the wings is the ancestral state of a family of butterflies. one lineage contains five species, four without spots and one with spots. analysis of museum specimens revealed that spots recently arose in the species with spots. this is an example of , which is a(n) .
Answers
The given scenario is an example of evolutionary novelties, which is a type of morphological innovation that appears in lineages.
Evolutionary novelties are a form of morphological innovation that appears in lineages. These novelties typically arise due to gene regulation alterations, which alter the development of specific structures, leading to novel phenotypes. These novelties do not replace pre-existing structures or forms, but rather they complement them, allowing for more complex organisms to develop.
A good example of this is the presence of spots on the wings of butterflies. In the given scenario, the presence of spots on the wings is the ancestral state of the family of butterflies. One lineage contains five species, four without spots, and one with spots. Analysis of museum specimens revealed that spots recently arose in the species with spots. This is an excellent example of evolutionary novelties, where the lineage containing the fifth species had an altered gene regulation, leading to the development of spots on their wings.
Learn more about phenotypes here:
https://brainly.com/question/32129453
#SPJ11
Identify FOUR prescription drugs which are commonly abused.
Answers
Answer:
Oxycodone
Prednisone
Acetaminophen
Morphine
Explanation:
Answer:
Barbiturates
Benzodiazepines
Codeine
Morphine
Consider the following two statements about succession.
Student 1:
Matthew - As succession begins, communities tend to be dominated by mostly K-selected species. As succession continues, r-selected species tend to compete better and therefore become more and more common.
Student 2:
Iman - As succession begins, communities tend to be dominated by mostly r-selected species. As succession continues, K-selected species tend to compete better and therefore become more and more common.
Which student is correct?
a. Provide a rationale for your answer (2 marks)
b. Provide a specific example of succession which includes at least one example of an r-selected and one example of a K-selected species. (1 mark)
Note - No marks are earned by simply agreeing with either Matthew or Iman
Answers
1. Bacteria. Two bacteria were placed in a dish. The number of bacteria quadruples every hour. There are now 131,072 bacteria in the dish. How many hours have passed since the original two bacteria we
Answers
To determine the number of hours that have passed since the original two bacteria were placed in the dish, we can use the fact that the number of bacteria quadruples every hour.
Starting with two bacteria, we can observe the progression:
Hour 1: 2 bacteria
Hour 2: 2 x 4 = 8 bacteria
Hour 3: 8 x 4 = 32 bacteria
Hour 4: 32 x 4 = 128 bacteria
Hour 5: 128 x 4 = 512 bacteria
Hour 6: 512 x 4 = 2048 bacteria
Hour 7: 2048 x 4 = 8192 bacteria
Hour 8: 8192 x 4 = 32768 bacteria
Hour 9: 32768 x 4 = 131072 bacteria
Therefore, it took 9 hours for the number of bacteria to reach 131,072.
To solve more questions on bacteria , visit the link below
brainly.com/question/30217998
#SPJ11
Which statement best explains why it is sometimes challenging to perform a
cost-benefit analysis or a cost-effectiveness analysis when it comes to
actions that involve the environment?
O A. People experience no benefits from protecting the environment,
only costs.
O B. Economics involves only manufactured products and not natural
resources.
O C. Environmental economics does not use the same tools as
traditional economics.
O D. Assigning a monetary value to some ecosystem services can be
difficult.
Answers
Answer: D, Assigning a monetary value to some ecosystem services can be
difficult.
Explanation: ap3x
Answer:
D
Explanation:
I just took the quiz
what is the second biggest insect on earth
Answers
Answer:
probably a big spider
Explanation:
Poison dart frogs live in the rainforest. They produce a poison by eating toxic fire ants. The only known predator is a snake, Liophis epinephelus. Which is most likely a density-independent factor that affects the poison dart population in the rainforest? clear cutting the rainforest limited food source susceptibility to disease increase in population of Liophis epinephelus
Answers
Answer:
Clear-cutting the rainforest
Explanation:
Density-independent factors of a population are factors that limit the size of a population irrespective of the density of the population.
A limited food source can only be defined by the size of a population, diseases will spread faster in high-density populations, and an increase in the population of a predator will cause a decrease in the population size of the predator's prey.
Clear-cutting of the rainforest means automatic destruction of the habitat of the poison dart frog's population, no matter the population size. Hence, clear-cutting of the rainforest is considered as the density-independent factor in this case.
Answer:
A.) clear cutting the rainforest
Explanation:
got it right on edge 2021
what molecule adds a phosphate group to ADP to make ATP
Answers
Answer:
ATP hydrolysis is one of the quintessential reactions of the cell and has led some to christen the ATP synthase, which adds phosphate groups onto ADP, as “the world's second most important molecule” (DNA arguably being the first
Explanation:
hope it will help you
Is climate science historical science, operational science, or
is it both? How does one’s worldview affect how they view climate
change? Pick a stance and defend your answer.
Answers
Climate science is a combination of both historical science and operational science. Climate science involves understanding the Earth's past climate and current climate and predicting future changes.
Operational science is focused on studying current natural phenomena, while historical science examines past events that are not currently happening or can't be observed anymore. Climate science combines the two as it studies past climate changes and current climate changes, and uses that information to make predictions about the future. Hence, climate science is both historical science and operational science.
A person's worldview can affect how they view climate change. For example, those who believe that human beings are the primary cause of climate change may advocate for increased environmental protection measures. Others may be more skeptical about the role of human activity in climate change, believing that it is part of a natural cycle that has happened before. Still, others may deny the existence of climate change entirely, believing that it is a hoax or exaggeration by the media or scientists. I believe that climate change is real and largely caused by human activity, but I understand that others may have different views based on their worldview and experiences. It is essential to consider different perspectives and gather as much information as possible to make informed decisions about how to address climate change.
Learn more about environmental
https://brainly.com/question/21976584
#SPJ11
A female horse gives birth to an offspring on a farm. The farmer notices the offspring
is especially fast and healthy. He would like to identify which male horse is the
offspring's father for selective breeding purposes. He asks a local university to run a
DNA fingerprint with DNA samples from the mother, offspring and the three male
horses on the farm. Which male does the data show is MOST likely the offspring's
father?
Answers
Answer:
male 2
Explanation:
Everything the offspring has that the mom doesn't , male 2 does
The farmer notices the offspring is especially fast and healthy. The male that data show is most likely the offspring's father is male 2.
What is selective breeding?The likelihood of biodiversity rises as a result of selective breeding. By breeding organisms for particular desired features that can be passed on to their progeny, a procedure known as selective breeding is used.
Because distinct features and genetic differences may become more obvious, biodiversity may rise as a result. Pick parents from a mixed population who exhibit these traits.
They have interbred. Select the best progeny with the necessary traits to create the following generation. Continue doing this for numerous generations until all of your progeny possess the desired traits.
Therefore, the male that data show is most likely the offspring's father is male 2.
To learn more about selective breeding, refer to the link:
https://brainly.com/question/483203
#SPJ2
One key piece of evidence as to the timing of the most lethal event is:
a. The DNA is the same for all the victims
b. People's pets were found with them
c. Collapse of the walls from the big earthquake
d. Lahar deposits that cover the site
e. most bodies are found in a single surge layer
Answers
Most bodies are found in a single surge layer. Therefore, option (E) is correct.
The majority of the bodies were found in a single surge layer, which is the main indicator of the timing of the most fatal incident. This implies that a catastrophic occurrence, like a natural disaster or a mass casualty event, took place at a certain period and caused the remains to be deposited in a concentrated layer.
This data suggests that a single incident, as opposed to several events spread out across time, was responsible for the high fatality rate. The presence of a distinct surge layer can offer important clues about the kind and timing of the incident that caused the fatalities.
Learn more about fatality rate, here:
https://brainly.com/question/30951275
#SPJ4
Please help me with this! *30 *points Picture included
Answers
Answer:
1.) The first picture is mitochondria and the second picture is chloroplast
2.) The second one is only in plants
3.) The first one is found more commonly in animal cells
4.) Glucose & oxygen goes into #1 and releases ATP energy and water & carbon dioxide (waste) during cellular respiration
5.) Sunlight and water goes into #2 and releases oxygen (waste)
6.) The waste product from mitochondria is what the chloroplast needs to perform photosynthesis and vice versa for mitochondria where the waste product from the chloroplast is what mitochondria needs to make ATP energy
7.) They both have folds and membranes because this is how energy is transferred from one place to another.
Explanation:
You want brainliest? Then be first!
Answers
Answer:
i believe that the answer is the second one
Explanation:
A scientist designed an experiment to test the effect of temperature on bacterial growth. He grew three different cultures of the bacterium e. Coli under three heat lamps at different temperatures. What was the independent variable in this experiment?.
Answers
A scientist designed an experiment to test the effect of temperature on bacterial growth. The independent variable in this experiment was temperature.
What is the bacterial growth?The outcomes display that microbes have a better increase price at 20, 25 and 30°C and 30°C than at 3°C. In general, an boom in temperature will boom enzyme pastime. But if temperatures get too excessive, enzyme pastime will reduce, and the protein (the enzyme) will denature.
General, the better the temperature, the greater without problems microorganisms can develop as much as a sure point. Very excessive and coffee temperatures each impede the enzyme strategies microorganisms rely on to survive.
Read more about the bacterium :
https://brainly.com/question/6941760
#SPJ4
Hyperhidrosis is a condition involving excessive sweating due to exaggerated stimulation to sweat glands. Which of the following divisions of the nervous system is at fault?
Sympathetic nervous system
Answers
Hyperhidrosis is a condition caused by excessive stimulation to the sweat glands and is regulated by the sympathetic nervous system. The sympathetic nervous system is part of the autonomic nervous system, which controls and regulates the body's involuntary functions such as heart rate, digestion, respiration, salivation, perspiration, and pupillary response.
This system is activated in moments of danger or stress and can cause sweating, increased heart rate, and pupil dilation.
Hyperhidrosis is a condition in which sweat glands are overly active, causing excessive sweating even in situations where sweating is not necessary or normal. This can be a very embarrassing and uncomfortable condition for those affected. There are many possible causes for hyperhidrosis, including genetics, endocrine disorders, neurological conditions, medications, infections, and various medical conditions. Treatment can vary from lifestyle modifications, medical therapies, and surgery.
In conclusion, hyperhidrosis is a condition caused by excessive stimulation of the sweat glands and is regulated by the sympathetic nervous system.
For more similar questions on hyperhidrosis,
brainly.com/question/27795477
#SPJ11
What is the Sl unit of time?
Ο Α.
second
O B.
minute
O c.
hour
OD day
Answers
Explanation:
Hey there!!
The si unit of time is second.
The international convention of scientists that was held in France had come to the conclusion that the si unit of time is second.
Hope it helps...
a gymnosperm seed is: group of answer choices a diploid embryo, haploid seed food tissue, and haploid seed coat tissue all of these answers are correct a diploid embryo, haploid seed food tissue, and diploid seed coat tissue two generations from the alternation of generations a diploid embryo and a triploid seed coat tissue
Answers
A gymnosperm seed is composed of a diploid embryo, haploid seed food tissue, and haploid seed coat tissue. Option A is the correct answer.
This is because gymnosperms, like all seed plants, produce seeds through the process of sexual reproduction where the female gametophyte (which is haploid) is fertilized by the male gametophyte (also haploid) to form a diploid zygote.
The zygote develops into a diploid embryo, while the haploid seed coat tissue and haploid seed food tissue are derived from the female gametophyte. Therefore, option (a) is the correct answer.
Learn more about the gymnosperm seed at
https://brainly.com/question/30704907
#SPJ4
The question is -
A gymnosperm seed is:
a. A diploid embryo, haploid seed food tissue, and haploid seed coat tissue
b. A diploid embryo, haploid seed food tissue, and diploid seed coat tissue
c. A diploid embryo and a triploid seed coat tissue
d. All of these answers are correct
e. Two generations from the alternation of generations
Improved body composition is an important outcome of resistance training. What happens as the amount of lean muscle tissue increases?.
Answers
As the amount of lean muscle tissue increases, the metabolic rate increases.
How does muscle improve body composition?Your capacity to move and lift items is related to your muscular strength. It is determined by how much weight you can lift for a brief amount of time and how much power you can apply.
Resistance training activities like weightlifting, bodyweight exercises, and resistance band exercises are a few examples of workouts that help build muscle strength and power. Hill climbing, cycling, and running are further alternatives.
Continue reading to find out more about the distinction between physical strength and muscular endurance, as well as the advantages, risks, and workouts for developing muscle strength.
To learn more about resistance training from given link
https://brainly.com/question/16099084
#SPJ4
Draw a model of how the organism has changed in the last 50 years as a result of environmental changes.
Answers
Environmental changes can lead to evolution and adaptation of organisms, such as changes in physical and behavioral traits, but not all organisms may be able to adapt, leading to declines in population or extinction.
What are some examples of physical and behavioral changes that organisms may undergo in response to environmental changes?Organisms may develop new physical features, alter their metabolism, or change their behaviors to adapt to environmental changes.
How does environmental change affect the survival of organisms?Environmental change can put pressure on organisms, and those that are unable to adapt may experience declines in population or even extinction, while those that can adapt may survive and thrive.
Learn more about organisms here:
https://brainly.com/question/12825206
#SPJ1
macromolecules in which class have the key function of storing genetic information?
Answers
Genetic information is stored, transmitted, and expressed by nucleic acids, which are polymers. The sequences of monomers that make up nucleic acids are coded with this data.
Macromolecules are what?In essence, macromolecules are polymers—lengthy sequences of molecular building blocks known as monomers. Long polymers are present in carbohydrates, proteins, and nucleic acids. They are referred to as macromolecules since they are polymeric and huge in size.
What are macromolecules, and what are their purposes?A cell is made up of several large molecules known as macromolecules, which give it vital life-supporting functions. For instance, macromolecules offer structural support, a way to store energy, the capacity to store and retrieve genetic data, and the capacity to quicken metabolic processes.
To know more about Genetic information visit:-
https://brainly.com/question/13185061
#SPJ4
What are three parts of the
nervous system?