The percentage of floating leaf disks is a reasonable measure of photosynthetic rate because the leaves float due to____ production. a. carbon dioxide b. oxygenc. water d. bicarbonate e. cresol red
Answers
The percentage of floating leaf disks is a reasonable measure of the photosynthetic rate because the leaves float due to oxygen production. Therefore, the correct answer is option B
The light-dependent reactions of photosynthesis occur in the thylakoid membranes of chloroplasts, where the energy from light is converted into chemical energy. Oxygen is a product of the light-dependent reaction of photosynthesis, and when leaf disks undergo photosynthesis, they produce oxygen that gets trapped in the leaf disks. When leaf disks produce oxygen, the buoyancy of the leaf disks increases, causing them to float. Since the number of leaf disks that float depends on the photosynthetic rate, the percentage of floating leaf disks is a reasonable measure of the photosynthetic rate.
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Related Questions
which substance is harmful to the body when consumed (A) calcium (B) Cobalt chloride (C) iron (D) phosphorus (E) sodium chloride
Answers
Answer:
I think it's probably E, sodium chloride
How does geoscience processes and current human activities affect resources in a swamp?
Resources like trees, plants, and animals))
Answers
Answer:
The Plants and animals all on the surface of the Earth. Disintegrate into the ground. That is A human related proble.
Explanation:
Any process that happened on Earth such as plate tonics weathering and the breakdown of rocks into smaller particles.
The mechanism by which the end product of a metabolic pathway inhibits an enzyme that catalyzes an earlier step in the pathway is most precisely described as Group of answer choices feedback inhibition cooperativity inhibition irreversible inhibition competitive inhibition
Answers
The mechanism by which the end product of a metabolic pathway inhibits an enzyme that catalyzes an earlier step in the pathway is most precisely described as feedback inhibition. The correct answer is option a.
Feedback inhibition is a regulatory mechanism that allows a cell to control the rate of a metabolic pathway by using the end product of the pathway as a signal to inhibit an earlier enzyme in the pathway. This inhibition reduces the rate of the pathway and prevents the accumulation of excess products.
Feedback inhibition is a type of reversible inhibition, which means that the inhibition can be relieved if the concentration of the end product decreases or if a different signal overrides the inhibition.
This is in contrast to irreversible inhibition, which permanently inactivates the enzyme, or competitive inhibition, which occurs when a molecule similar to the substrate binds to the active site of the enzyme and prevents the substrate from binding.
So, the correct answer is option a.
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The question is:
The mechanism by which the end product of a metabolic pathway inhibits an enzyme that catalyzes an earlier step in the pathway is most precisely described as
a) feedback inhibition
b) cooperative inhibition
c) irreversible inhibition
d) competitive inhibition
Explain how mutations cause variation.
Answers
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
an example of a density dependent limiting factor is...
A) an avalanche
B) The amount of available food
C) a sudden flood
D) a decrease in water due to drought.
(please don't guess)
Answers
An example of a density-dependent limiting factor is the amount of available food. Thus, the correct option for this question is B.
What is a density-dependent factor?Density-dependent factors may be defined as those factors that may significantly vary with the density of the population. These factors may affect a higher proportion of individuals when population densities are higher and a lower proportion when the population is lower.
Examples of these factors may effectively include food, competition, predation, parasitism, accumulation of toxic wastes, etc. While options like a sudden flood, a decrease in water due to drought, etc. may include examples of density-independent factors.
Therefore, an example of a density-dependent limiting factor is the amount of available food. Thus, the correct option for this question is B.
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Evidence that cytoskeletal elements have ancient origins comes from the: sequence similarities of cytoskeletal elements when comparing distantly related organisms. presence of cytoskeletal elements in both eukaryotes and prokaryotes. ability to form functional hybrid microfilaments from actin monomers taken from distantly related organisms. observation that both prokaryotes and eukaryotes use cytoskeletal elements to assist cell division. All of these choices are correct.
Answers
Answer:
All of these choices are correct.
Explanation:
A cell can be defined as the fundamental or basic functional, structural and smallest unit of life for all living organisms. Some living organisms are unicellular while others are multicellular in nature.
A unicellular organism refers to a living organism that possess a single-cell while a multicellular organism has many (multiple) cells.
Generally, cells have the ability to independently replicate themselves. In a cell, the "workers" that perform various functions or tasks for the survival of the living organism are referred to as organelles. Some examples of cell organelles in all living organisms such as trees, birds, and bacteria include; nucleus, cytoplasm, cell membrane, golgi apparatus, mitochondria, lysosomes, ribosomes, chromosomes, endoplasmic reticulum, vesicles, cytoskeleton, etc.
Cytoskeleton refers to a structure consisting of filaments and tubules which help to maintain internal organization and support the shape of the cells. It comprises of three (3) main filaments and these includes: actin filaments, intermediate filaments and microtubules.
Generally, there are numerous evidence that cytoskeletal elements have ancient origins and they include all of the aforementioned facts.
What’s the difference between a primary source and a secondary source?
A primary source was written by someone who actually experienced the event.
The difference is about where the source appears—online or in print.
Primary sources are shorter than secondary sources. The difference is about how closely the source relates to your topic.
PLEASE HELP ME!!!!!!!
Answers
Answer:
"A primary source was written by someone who actually experienced the event."
Answer:
"A primary source was written by someone who actually experienced the event."
Explanation:
research on the tuning curves of individual inner hair cells indicates that: group of answer choices each hair cell responds maximally to a single frequency but also responds somewhat to nearby frequencies. each hair cell responds to all possible frequencies in the human hearing range. each hair cell responds only to a single frequency. only outer hair cells respond to different frequencies.
Answers
Associated with increases in the firing rate of individual auditory nerve fibers that are sensitive to the frequency to which the hair cell is tuned. As a result, each hair cell responds to a particular frequency at its maximum level while also responding somewhat to neighboring frequencies. Option C .
This tuning allows for a range of frequencies to be detected and processed by the auditory system. Increases in loudness are achieved through increased activation of the hair cells and corresponding auditory nerve fibers, rather than changes in the tuning properties of individual hair cells.
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Full Question ;
Research on the tuning curves of individual inner hair cells indicates that:
A) each hair cell responds only to a single frequency.
B) each hair cell responds to all possible frequencies in the human hearing range.
C) each hair cell responds maximally to a single frequency but also responds somewhat to nearby
frequencies.
D) only outer hair cells respond to different frequencies.
C
Which statement does not describe radioactive atoms?
A. They are used for absolute dating of samples.
B. They change into atoms of a different element.
O C. They are extremely stable types of atoms.
D. Half of the atoms decay during one half-life.
SUBMIT
Answers
Answer:
B
Explanation:
B is the answer because if you put a different answer it won't make sence
Answer:
Its C on Ap.ex
Explanation:
Please can someone help me?
Answers
Answer:
Explanation:
23. C
24. A
True or False
The large intestine is 20 feet long and 2 inches wide
Answers
False. The statement is false that the large intestine length is 20 feet long and 2 inches wide.
Misleading. The length and width of within organ can change among people and rely on different parts, like mature, sex, diet, and thriving status. Overall, the stomach related organ is around 5 feet in length and 2.5 inches wide. It is the last piece of the stomach related framework and is in danger of drawing in water, electrolytes, and several enhancements and minerals from the additional waste material. The inside organ is separated into two or three parts, including the cecum, colon, rectum, and butt. The colon, which is the longest piece of within organ, is additionally segregated into four packages: the rising colon, move past colon, dropping colon, and sigmoid colon.
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Cyanite (Al2SiO5), quartz (SiO2), and leucite (KAlSi2O6) may be grouped together because they are all part of the largest mineral group called:
Answers
Answer:
Explanation:
Cyanite, quartz and lucite are all part of the potassium mineral group
The study of chemicals and bonds is called chemistry.
The correct answer to the question is potassium.
What are minerals?A mineral or mineral species is, broadly speaking, a solid chemical compound with fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form. The geological definition of mineral normally excludes compounds that occur only in living beings.According to the question, all these minerals belong to the potassium group.
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what is meant by morphology?
Answers
The study of internal structure of words.
mere nai khyal ye chis teri arts mai bhi aati hogi
Answer:
Definition of morphology
1a : a branch of biology that deals with the form and structure of animals and plants. b : the form and structure of an organism or any of its parts amphibian morphology external and internal eye morphology.
which of the following elements is a metalloid
A. sulfur
B.iron
C.silicon
D.copper
Answers
Answer:
The answer is C. Silicon
Explanation:
The term is normally applied to a group of between six and nine elements (boron, silicon, germanium, arsenic, antimony, tellurium, and possibly bismuth, polonium, astatine) found near the center of the P-block or main block of the periodic table
WORTH 100 POINTS!!!!!!! Some people think that science can be defined as "a collection of facts" Explain why that is an inaccurate definition, and, in your own words, write your own definition of science.
Answers
Explanation:
Science is not just a collection of facts, but it is how you get those facts. Science is about the processes on how you arrive or come up with the answers. It is fulfilled by doing great amounts of researches, questions, and experiments on how the answers were made.
PLEASE HELPP!! :)))))
Summarize each stage of mitosis (prophase, metaphase, anaphase, telophase)
Answers
During prophase, the chromosomes shorten and thicken. Chromosomes align in the cell's middle during metaphase. During anaphase, chromatids split apart at the centromere and go to opposing poles. After each chromosomal group's nuclear envelopes have been rebuilt, the telophase is when two nuclei are formed.
What is the anaphase of mitosis?The duplicated genetic information found in a parent cell's nucleus is divided into two identical daughter cells during the fourth stage of mitosis, referred to as anaphase.
During telophase, the chromosomes begin to decondense, the spindle disintegrates, and the nuclear membranes and nucleoli reorganize. Each of the two daughter cells produced by the mother cell's cytoplasm splitting contains the same amount and kind of chromosomes.
Various chromosomes are frequently scattered all across the cell nucleus. While the cell's nucleus disintegrates during metaphase, the chromosomes of the cell condense and move near one another, aligning in the middle of the dividing cell.
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If Earth has 150,100,000 km^2 of
land area, how much land area is included in the
biodiversity hotspots?
PLS HELP NEED FOR TODAY!!!
Answers
Explanation:
A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[6]A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[6]To qualify as a biodiversity hotspot on Myers 2000 edition of the hotspot-map, a region must meet two strict criteria: it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation.[6] Around the world, 36 areas qualify under this definition.[7] These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian species, with a very high share of those species as endemics. Some of these hotspots support up to 15,000 endemic plant species and some have lost up to 95% of their natural habitat.[7]A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2]Norman Myers wrote about the concept in two articles in “The Environmentalist” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[6]To qualify as a biodiversity hotspot on Myers 2000 edition of the hotspot-map, a region must meet two strict criteria: it must contain at least 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 70% of its primary vegetation.[6] Around the world, 36 areas qualify under this definition.[7] These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian species, with a very high share of those species as endemics. Some of these hotspots support up to 15,000 endemic plant species and some have lost up to 95% of their natural habitat.[7]Biodiversity hotspots host their diverse ecosystems on just 2.4% of the planet's surface,[2] however, the area defined as hotspots covers a much larger proportion of the land. The original 25 hotspots covered 11.8% of the land surface area of the Earth.[1] Overall, the current hotspots cover more than 15.7% of the land surface area, but have lost around 85% of their habitat.[8] This loss of habitat explains why approximately 60% of the world's terrestrial life lives on only 2.4% of the land surface area.the ability of oxygen to bind hemoglobin changes with altitude as shown. which statement, if true, best explains this observation?
Answers
The ability of oxygen to bind hemoglobin changes with altitude due to the phenomenon of altitude-induced hypoxia. As altitude increases, the atmospheric pressure decreases, resulting in a decrease in the partial pressure of oxygen (PO2). This decrease in PO2 leads to a reduced availability of oxygen for binding to hemoglobin in the blood.
At lower altitudes, where the atmospheric pressure is higher, hemoglobin has a higher affinity for oxygen and readily binds to oxygen molecules, allowing for efficient oxygen transport to tissues and organs. However, at higher altitudes, where the atmospheric pressure is lower, the reduced PO2 leads to a decreased affinity of hemoglobin for oxygen. This means that hemoglobin is less likely to bind to oxygen molecules, resulting in reduced oxygen transport to tissues and organs.
This phenomenon is an adaptive response of the body to low oxygen availability at high altitudes. It helps to facilitate oxygen unloading from hemoglobin in tissues with lower oxygen tension, ensuring that oxygen is delivered to cells that need it the most. This is important for acclimatization to high altitudes, allowing the body to cope with reduced oxygen availability by adjusting the binding affinity of hemoglobin to oxygen.
Overall, the ability of oxygen to bind hemoglobin changes with altitude due to the altered atmospheric pressure and oxygen tension, and this adaptive response helps the body adapt to high altitudes and maintain oxygen delivery to tissues and organs.
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what physiological events occur between presentation and the pressing of the hand switch?
Answers
Physiological events such as sensory perception, neural processing, and motor response occur between presentation and the pressing of the hand switch.
When a stimulus is presented, sensory receptors in the body detect the stimulus and convert it into electrical signals. These signals are then transmitted to the brain through sensory pathways. In the brain, the signals are processed and interpreted, allowing for the perception and recognition of the stimulus. Once the stimulus is recognized, motor commands are generated in the brain and transmitted through motor pathways to the muscles responsible for hand movement. These commands initiate muscle contractions, leading to the pressing of the hand switch.
Overall, this sequence of physiological events involves sensory input, neural processing, and motor output, enabling the individual to perceive the stimulus and respond accordingly.
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Some insect species are resistant to pesticides. Which statement BEST explains this phenomenon? Natural selection resulted in an unfavorable variation for the insects. Because their survival depended on it, the insects developed variations that made them resistant to poisons. Random variation in the population led to a population with a favorable adaptation. Some of the insects became instantly immune when the poisons were introduced into their environment
Answers
Answer:
Random variation in the population led to a population with a favorable adaptation
Explanation:
Insecticide resistance can be defined as an evolutionary process that causes a decreased susceptibility of an insect population to a particular insecticide. The evolution of the insecticide resistance occurs by the mechanism of natural selection, where most resistant insects survive and thus pass on their acquired heritable resistance to their offspring. Moreover, the evolutionary origins of the resistance trait may be associated with different processes: 1-de novo mutations (i.e., the emergence of beneficial genetic changes in the population), 2-standing variation in the original population which is selected under the selective agent (in this case, the pesticide), 3-migration of resistant specimens originally resistant to the pesticide, and 4-even interspecific transfer (i.e., horizontal transfer between different species).
Whether of not the cell is partitioned into compartments by internal membranes decides whether it is
Answers
Whether of not the cell is partitioned into compartments by internal membranes decides whether it is prokaryotic or eukaryotic.
Prokaryotic cells are cells that do not have internal membrane-bound compartments or organelles, meaning that the genetic material, ribosomes, and metabolic pathways are all freely floating in the cytoplasm. Prokaryotic cells are typically smaller and less complex than eukaryotic cells, and include bacteria and archaea.
Eukaryotic cells, on the other hand, have internal membrane-bound compartments or organelles that allow for compartmentalization of different cellular functions. The genetic material is contained within a nucleus, and other organelles such as mitochondria, endoplasmic reticulum, and Golgi apparatus are responsible for specific cellular functions.
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Which of the following are pictured below?
Image of a daughter cell containing two halves of a chromosome.
A. Spindle Fibers
B. Sister Chromatids
C. Nuclear Envelope
D. Homologous Chromosomes
Answers
What are the advantages and disadvantages of a catalytic
incinerator over a regenerative thermal oxidizer and a rotary
concentrator thermal oxidizer?
Answers
Catalytic incinerator: lower temperature, higher destruction efficiency. RTO: high thermal efficiency, large size. RCTO: effective for low-concentration VOCs, complex operation.
A catalytic incinerator offers several advantages over a regenerative thermal oxidizer (RTO) and a rotary concentrator thermal oxidizer (RCTO). Firstly, catalytic incinerators operate at lower temperatures, leading to lower energy consumption and reduced operating costs compared to RTOs and RCTOs. This makes them more cost-effective in the long run.
However, there are also some disadvantages associated with catalytic incinerators. Over time, the catalyst can become deactivated, reducing its efficiency and requiring periodic replacement or regeneration. Catalytic incinerators may also be sensitive to certain contaminants that can poison or coat the catalyst, affecting performance.
In comparison, RTOs have the advantage of high thermal efficiency and reliability. They recover and reuse heat from the combustion process, resulting in energy savings. However, RTOs require high operating temperatures, leading to increased energy consumption, and they have larger footprints, requiring more space for installation. RCTOs, on the other hand, are effective for low-concentration VOCs and have lower energy consumption than RTOs.
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Please help thanks and I’ll give you brainiest.
Answers
Answer:
the amswer is will be about 100% C
can i plzz get brainiest
how are falcons, herons, and parrots different? what specific traits do they have that distinguish them as separate species?
Answers
Falcons, herons, and parrots are different in various ways, including their physical characteristics, behavior, and habitat. Falcons are birds of prey known for their strong, hooked beaks, sharp talons, and excellent eyesight. They are known for their incredible speed and agility while hunting, which helps them catch their prey. Herons, on the other hand, are long-legged wading birds found near water. They have long, thin beaks that they use to catch fish and other aquatic animals. Herons are also known for their striking appearance and slow, graceful movements. Finally, parrots are colorful birds that are often kept as pets. They have strong, curved beaks that they use to crack open nuts and seeds, and their feet are designed for grasping branches and perching. Parrots are also known for their intelligence, ability to mimic human speech, and playful behavior.
In terms of specific traits that distinguish them as separate species, falcons are known for their powerful, muscular bodies and sharp, curved beaks that they use for killing prey. They are also known for their excellent vision and hunting skills. Herons have long legs that allow them to wade in shallow water, as well as long, thin beaks that they use for catching fish and other small animals. They also have unique plumage and distinctive mating displays. Parrots have colorful feathers and strong beaks that they use for eating and climbing. They are also known for their ability to mimic human speech and their playful behavior. Each of these species has its own unique characteristics that make it well-adapted to its particular environment and way of life.
What features are formed along the divergent boundary?
Answers
rift valleys
mid oceanic ridges
List 3 facts about HIV/AIDS
Answers
Answer:
Fact: HIV and AIDS are problems in the United States. ...
Fact: HIV is not the same as AIDS. ...
Fact: HIV tests are reliable. ...
Fact: HIV cannot be cured. ...
Fact: There is no vaccine to prevent HIV. ...
Fact: People with HIV should start HIV medicine right away.
Explanation:
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explain positive negative and zero acceleration
Answers
this answer i need pls ill mark brainliest
Answers
All - growth, exchange of gases, excretion, reproduction, and death (option d).
All living organisms undergo various life processes to maintain their existence. Let's analyze each option to determine which life processes are carried out by an organism's cells:
A. Only growth and exchange of gases: While cells are involved in growth and exchange of gases, they also participate in other life processes. This option is incomplete.
B. Only growth, exchange of gases, and reproduction: Cells play a crucial role in reproduction as they are responsible for the production of gametes and the process of cell division. However, there are additional life processes that cells also undertake.
C. Only growth, exchange of gases, excretion, and reproduction: This option includes excretion in addition to growth, exchange of gases, and reproduction. Cells participate in excretion by eliminating waste materials. However, there is one more life process that cells experience.
D. All - growth, exchange of gases, excretion, reproduction, and death: This option encompasses all the mentioned life processes. Cells are involved in growth as they undergo cell division and increase in number. They exchange gases through processes like respiration. Cells excrete waste products. They participate in reproduction through the formation of gametes and cell division. Lastly, cells also experience death as they have a limited lifespan.
Therefore, the correct answer is D. All - growth, exchange of gases, excretion, reproduction, and death.
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What are the two cycles of photosynthesis