A. Arthropods, mollusks, and annelids
B. Cnidarians and echinoderms
C. Echinoderms and chordates
D. Arthropods only
Answers
Answer:
a
Explanation:
Answer: c
Explanation:
Related Questions
In an experiment, a researcher prepares a reaction mixture by dissolving a substance in a buffered solution. The substance is the substrate of a certain enzyme. The researcher adds a small amount of the enzyme to the reaction mixture and measures the amount of product that is formed over time. Which of the following best predicts the immediate result of adding more substrate to the reaction mixture at the point indicated by the arrow in Figure 1?
answer choices
The amount of product will decrease until the reaction rate goes to zero.
The amount of product will increase until the reaction reaches its equilibrium point or until the substrate is used up by the reaction.
The amount of product will increase without stopping because the enzyme will be unchanged by the reaction.
The amount of product will decrease until the reaction reaches its equilibrium point or until the enzyme is been used up by the reaction
Answers
Until equilibrium is reached or all of the substrate has been eaten, the amount of product will continue to increase.
How can the rate at which an enzyme-catalyzed reaction occurs be determined?It is possible to identify enzyme catalysis by measuring the appearance of the product or the disappearance of the reactants. The same reactants may be used in a reaction, but a different catalyst may produce different results.
Which of the following would speed up how quickly reactants turn into products in a chemical reaction?The more the temperature rises, the more crashes occur. As a reactant's concentration rises, the likelihood of reactant collisions increases as well, accelerating the rate of the reaction.
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In two or three well-developed paragraphs, explain how citizens can affect environmental policy at each level of government: local, state, and national.
Answers
Local
Citizens can take a local initiative for example go around and voluntarily pick up trash and garbage make sure to spread the word to keep the environment safe and clean since us citizens are the ones who need to take action on the policies
State
State governments can introduces advantages for the citizens who take part in the policies and hold marches and events to raise awareness
National
National governments can introduce enticing policies for both citizens and state governments since we need everyone to take part
What conditions in an ecosystem are likely to allow a species to become invasive there? How might scientists use biomes to study this?
Answers
native ecosystem of a species, it
would probably be easier for it to
invade. Scientists might refer to
descriptions of biomes to predict
where a species might become
invasive. For example, if the species
is found in a new location that
is the same biome as its native ecosystem,
it is probably more likely
to become invasive.
Please help Which of the following is found on the outside of skeletal muscles? Sarcomere Sheath Bundles Myofibrils
Answers
Answer:
Hey there!
The correct answer would be sheath. The sheath is located outside of a skeletal muscle.
The following found on the outside of skeletal muscles is the sheath. The correct option is B.
What is skeletal muscle?Skeletal muscles are voluntary muscles that are attached to bones by tendons. They are often called muscle fibers, and they are usually longer than other muscle cells.
The skeletal muscle is surrounded by a tissue sheath called epimysium. So it is present outside the skeletal muscle.
Thus, option B. sheath is correct.
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why is development work necessary for the development of nation?
Answers
Answer:
Development work is necessary for the development of the nation because if the nation will be developed there would be many facilities for the citizens of that nation and development it leads to to economic prosperity.
Explanation:
I hope it help you friend
Would climbing stairs be considered a Somatic or a Autonomic nervous system movement?
Answers
Answer: = the somatic system
Explanation:
They are part of the somatic nervous system, which is responsible for voluntary movements such as walking or climbing the stairs.
give examples of terrestrial food chain.(one edaphic food chain and one aboreal food chain
Answers
Answer:
Nectar (flowers) - butterflies - small birds - foxes.
Dandelions - snail - frog - bird - fox.
Dead plants - centipede - robin - raccoon.
Decayed plants - worms - birds - eagles.
Fruits - tapir - jaguar.
Fruits - monkeys - monkey-eating eagle.
Grass - antelope - tiger - vulture.
Grass - cow - man - maggot.
Explanation:
Answer:
Grass-Grasshopper-Snake-Hawk
Explanation:
very simple one
Carlos calculated the biomass of each trophic level in an ecosystem. The values he calculated were: 5, 689 12,561 999 9 m² 292, 635 9 m2 What is the average biomass of the apex predators in this ecosystem?
O 999 9 m²
O 292, 635
O 12,561 9 m² 9 m² 9 m²
O 5,689 2 2 m²
Answers
Based on the values provided, the apex predators have a biomass of 5,689 9 m².
What is ecosystem?An ecosystem is a complex community of living organisms and their non-living environment, in which they interact with each other and with the physical and chemical factors of their surroundings. It includes all living things, such as plants, animals, microorganisms, and their physical surroundings, such as air, water, soil, sunlight, and nutrients. Ecosystems can range in size from small ponds to vast forests or oceans. They can be found in various environments, including terrestrial, freshwater, and marine environments.
Here,
To calculate the average biomass of the apex predators, we first need to identify which trophic level represents the apex predators in the ecosystem. The apex predators are usually at the top of the food chain and consume other predators, so we can assume that the highest value in the list corresponds to the apex predators.
To double-check, we can also calculate the average biomass of all the trophic levels and see if the highest value matches that average. The average biomass is calculated by adding up all the values and dividing by the total number of values:
(5,689 + 12,561 + 999 + 9 + 292,635 + 9) / 6 = 49,900.33 9 m²
As we can see, the highest value (292,635 9 m²) is significantly higher than the average biomass (49,900.33 9 m²). Therefore, we can conclude that the average biomass of the apex predators in this ecosystem is 292,635 9 m².
Therefore, the average biomass of the apex predators in this ecosystem is 5,689 9 m², which means that on average, each individual apex predator in this ecosystem has a biomass of 5,689 kilograms per 9 square meters.
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A volcano that has not erupted in a very long time suddenly has a plume of steam coming from it. Which best describes this volcano?
A.)was dormant and is now active
B.) was quiet and is now active
C.)was extinct and is now explosive
D.)was dormant and is now explosive
Answers
Answer:
The answer is A
Explanation:
Quiet and extinct are not words to describe a volcano that hasn't erupted in a long time. those are called dormant. When they start to heat up, steam or erupt, they are active.
Answer:
The answer is A
Explanation:
A farmer grows potatoes by separating out the "eyes" and planting the pieces containing the "eyes". The means by which the farmer grows potatoes is known as
Group of answer choices
sexual reproduction
asexual reproduction
binary fission
cross-pollination
Answers
Answer:
my guess would be binary fission, in not 100% sure
Explanation:
Answer: asexual reproduction.
Explanation: the process id called budding
what is the sequence of the mrna molecule synthesized from the dna template strand 5′−taacggtacgat−3′? enter the mrna sequence using the one‑letter abbreviations for the nucleotides.
Answers
The sequence of the mRNA molecule synthesized from the DNA template strand 5′−TAACGGTACGAT−3′ is 3'-AUUGCCAU GCUA-5'.
In transcription, the DNA sequence is copied into an RNA molecule by a process called RNA polymerization. The RNA polymerase enzyme moves along the DNA, unwinding the double helix and adding RNA nucleotides to the new RNA strand, using the DNA template to guide the base pairing.
In RNA, there are four nucleotide bases: adenine (A), cytosine (C), guanine (G), and uracil (U). The base sequence of mRNA is complementary to that of the DNA template strand; therefore, the mRNA sequence synthesized from the DNA template strand 5′−TAACGGTACGAT−3′ is 3'-AUUGCCAU GCUA-5'.
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What cell tissue helps carry messages? .
Answers
The answer ➪ The cellular tissue that helps transport messages is nervous tissue.
Insta: 25k_kemAnswer:
A special cell called a neuron is responsible for carrying these messages. There are about 100 billion neurons in the human brain.
Explanation:
Which of these organisms is not matched to the main type of nitrogenous waste it excretes?
Reptiles−−uric acid
Terrestrial insects−−uric acid
Freshwater fishes−−ammonia
Marine fishes−−ammonia
Answers
The correct option is B -Terrestrial insects−−uric acid.
The species that is incompatible with the main sort of nitrogenous waste it excretes is an insect that lives on land. The correct response for terrestrial insects is "uric acid," not "ammonia."
The primary nitrogenous waste excreted by terrestrial insects, such as insects and spiders, is uric acid. Uric acid is a somewhat insoluble waste product that requires less water for excretion in organisms living in dry or terrestrial settings.
Hence option B is correct.
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A tumor is:
unregulated cell division in the body.
regulated cell division in the body.
a lineage of genetically identical individuals or cells.
a mass of cells that does not serve a function in the body.
Answers
Answer: it's kind of options a and d together. A tumor is an abnormal mass doesn't serve any function and it results from an excessive cell division
A student observes that a popcorn kernel has a hard coat. He places the kernel in a moist paper towel and observes it for several days. He notices that the coat splits and a small root emerges. He concludes that—
water outside the seed coat exerted a pushing force, breaking the seed coat
air inside the seed coat exerted a pushing force, breaking the seed.
water outside the seed coat exerted a pulling force, breaking the seed coat.
gravity exerted a pulling force on the stem, breaking the seed coat.
Answers
Answer:
d
Explanation:
got it right on the test
How are the results and findings of scientific study communicated?
Answers
Answer:
Typically, scientists communicate their work within the scientific community by writing and publishing research articles and presenting posters and oral communication of scientific conferences.
Answer:
Scientists often communicate their research results in three general ways. One is to publish their results in peer-reviewed journals that can be ready by other scientists. Two is to present their results at national and international conferences where other scientists can listen to presentations.
what is homeostasis?
Answers
Answer:
the tendency toward a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes.
Explanation:
Drag the correct labels to the image. Not all labels will be used.
Ricky notices a similarity between a fried egg and the diagram of a cell. Which cell organelles is Ricky likely to associate with the parts of the eg
Answers
Answer:
1. plasma membrane
2. cytoplasm
3. nucleus
Explanation:
can a theory be created by just one person ?
Answers
Answer:
Theories can be created by just one person
YesExplanation:
What normally happens is that one person creates a theory, and as years go by new research comes out further advancing or modifying a theory. The theory then is created by many people. Which overall still means that theories can be created by just one person.
Which statements describe characteristics that are common to both gymnosperms and angiosperms? Check all that apply.
•They have roots, stems, and leaves for nutrient transport.
•They have flowers.
•They are autotrophs.
•They rely on diffusion for nutrient transport.
•They are heterotrophs.
•They have seeds.
I chose A, C, D, and F and it wasn't right.
Answers
Answer:
A, B, E
Explanation:
the hypothalamus controls the posterior pituitary by way of __________.
Answers
Scientists have proposed more than two dozen ways to define species. One commonly used definition, called the biological species concept, holds that populations belong to the same species if they can contribute genes to a common gene pool. Reproductive barriers block gene flow between different species. Gene flow between populations tends to hold the gene pool of a species together. Three of the most prominent definitions of species are the biological species concept, the phylogenetic species concept, and the morphological species concept. For each characteristic, identify the a
Answers
Complete question:
Scientists have proposed more than two dozen ways to define species. One commonly used definition, called the biological species concept, holds that populations belong to the same species if they can contribute genes to a common gene pool. Reproductive barriers block gene flow between different species. Gene flow between populations tends to hold the gene pool of a species together.
Part A - Comparing species definitions
Three of the most prominent definitions of species are the biological species concept, the phylogenetic species concept, and the morphological species (morphospecies) concept.
Drag each characteristic to the appropriate bin based on the species concept(s) to which it applies → You will find this in the attached files
Answer:
Not applicable for extinct species → Biological Based on evolutionary history → Phylogenetic Relies on similarities in structure → Morphological Accommodates asexual reproduction / Species acceptance criteria can be subjective → Morphological and PhylogeneticUsed by scientists in classification → Morphological, Phylogenetic, and BiologicalExplanation:
The biological concept states that species are population groups that -in a real or potential way- can mate and reproduce, but are reproductively isolated from other groups.
Individuals belonging to a species cannot reproduce with members of other species.
This biological concept has limitations. Its application might present difficulties in concern with asexual reproduction species, such as bacteria, rotifer, cnidarians, plants, and etcetera.
Besides, this concept cannot be applied to the past because it is difficult to deduce reproductive capability between extinct species.
Finally, this concept is not adequate concerning hybridization zones, something to be expected considering evolutionary processes. This is the reason why it has been less accepted by botanists, as some plant species hybridize with other species.
The phylogenetic species concept defines species on a determined time and through time, and these are the horizontal and vertical species concepts, respectively. The species group is considered to be the less inclusive monophyletic group.
According to the phylogenetic concept, a species is a monophyletic group whose organisms share synapomorphies.
The establishment of species relies on molecular markers.
The morphological species concept defines species according to the shared morphological characteristics shared by all the members of the species. It is a descriptive method to separate species.
When a group differs considerably at a morphological level from another group, it is defined as a different species.
Some limitations might emerge from this species concept. It does not consider variability among individuals,
Individuals of the same species might be polymorphic, exhibiting morphological differences between organisms. These individuals would be considered to be different species following the morphological concept. Some different species might be morphologically similar, despite being different. These species might be considered as one following the morphological concept.
Annual plants typically have which of the following: lifespan of a year or less low-resource environments small fruit very few seeds
Answers
Annual plants typically have a lifespan of a year or less.
What is the usual lifespan of annual plants?
Annual plants, as their name suggests, complete their life cycle within a single year or less. Unlike perennial plants that can live for multiple years, annuals germinate, grow, flower, set seed, and die all within a short span.
This rapid life cycle adaptation allows annual plants to quickly take advantage of favorable environmental conditions, making them well-suited for low-resource environments.
Their ability to produce small fruits and very few seeds is a characteristic that aids in their efficient dispersal and colonization of new areas. Annual plants play an important role in ecosystem dynamics and can provide valuable resources for other organisms.
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Examine the image of the relatedness of vertebrates represented in this phylogenetic tree. Select all the statements
that are supported by this tree.
A)
Gray whales are the common ancestor of the Blue and Humpback whales.
B)
Blue and humpback whales diverged more recently than either did from
the gray whale
The Bryde's whale shares a more recent common ancestor with the Sei
whale than with the Fin whale.
D
The blue and the Bryde's whale have more traits in common with each
other than with any other two species,
E
Southern minke whales and Northern minke whales have more traits in
common with each other than with any other species
Answers
By analyzing a phylogenetic tree, we can establish relationships between different taxonomic groups. Nodes, branches, and lineages provide information for these interpretations. The statements are C and E.
--------------------------------------
The phylogenetic tree is composed of,
Lineages → The taxonomic groups of interest. These are placed in the extremes of the branches. Nodes → These are the ramification points, which are also known as divergence points. They represent the location of the most recent common ancestor. Root → This is the older common ancestor that all lineages share. The first one in the tree.
⇒ Highly related groups that share a recent common ancestor. This means that they all diverge from the same node.
⇒ Lineages less related to each other are those whose common ancestor is far away in history.
A) Gray whales are the common ancestor of the Blue and Humpback whales. ⇒⇒⇒ NO
B) Blue and humpback whales diverged more recently than either did from
the gray whale ⇒⇒⇒ NO
C) The Bryde's whale shares a more recent common ancestor with the Sei
whale than with the Fin whale ⇒⇒⇒ YES
D) The blue and the Bryde's whale have more traits in common with each
other than with any other two species ⇒⇒⇒ NO
E) Southern minke whales and Northern minke whales have more traits in
common with each other than with any other species ⇒⇒⇒ YES
-------------------------------------------------
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Answer:
C, E
Explanation:
I did it on USATestPrep
A group of students were trying to understand how meiosis works. They picked a bunch of dandelions in order to examine the developing seeds and found two distinct groups of cells, A & B.
A 2 column table with 4 rows. Column 1 is labeled Observation # with entries I, I I, I I I, I V. Column 2 is labeled Prediction with entries the cells in group B had chromosomes in 2 distinct lines; the cells in group A divided and produced 2 daughter cells; sister chromatids were pulled apart by microtubules in group A; chromosomes were made up of 2 sister chromatids in group b.
If the students wished to determine which cells are undergoing meiosis I or meiosis II, which observations would be useful to help with making the distinction?
I & II
I & III
II & IV
III & IV
Answers
By using these observations, the students can differentiate between cells undergoing meiosis I (group A) and meiosis II (group B).
To determine which cells are undergoing meiosis I or meiosis II, the students can use observations III and IV.
Observation III states that the cells in group A divided and produced 2 daughter cells.
This is characteristic of meiosis I, where a cell undergoes division to produce two daughter cells with half the number of chromosomes as the parent cell. In meiosis II, the daughter cells from meiosis I divide again to produce four cells with a single set of chromosomes.
Observation IV states that chromosomes were made up of 2 sister chromatids in group B.
This indicates that group B cells are in meiosis II, where the sister chromatids are pulled apart by microtubules to separate into individual chromosomes.
By using these observations, the students can differentiate between cells undergoing meiosis I (group A) and meiosis II (group B).
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for each step of photosynthetic electron flow from water to nadp , drag the appropriate label to indicate whether or not that step requires an input of energy.
Answers
The step of what is needed in the photosynthetic electron flow from water to NADP+ are:
1. No energy input required.
2. Energy input needed.
3. No energy input needed.
4. Energy input needed.
5. No energy input needed.
How do electrons move during photosynthesis?It moves between the two photosystems, electrons are transported successively, with photosystem I producing NADPH and photosystem II producing ATP.
Beginning at photosystem II, which is similar to the previously characterized photosynthetic reaction center of R. viridis, the electron flow channel begins.
The oxidative phosphorylation process, also known as the electron transport chain, is a collection of four protein complexes which tends to combine redox events to produce an electrochemical gradient that results in the production of ATP.
Therefore, Both photosynthesis and cellular respiration take place in mitochondria.
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See full question below
For each step of photosynthetic electron flow from water to NADP+, drag the appropriate label to indicate whether or not that step requires an input of energy.
1) Water to P680+
2) P680 to Pq (plastoquinone)
3) Pq to P700+
4) P700 to Fd (ferredoxin)
5) Fd to NADP+
help pls, just need this part on the top
Answers
Answer:
Concentration Gradient
Explanation:
This means that it will move from a region where it's in lower conc to a region of higher conc
describe the major differences between the structures of the 5’ nucleotides on mrna, trna, u1 snrna and ribosomal rna.
Answers
The structure of 5’ nucleotides of mRNA, tRNA, U1 snRNA and Ribosomal RNA varies significantly.
mRNA is a single-stranded molecule composed of nucleotides with a 5’ cap and a 3’ poly-A tail. The structure of tRNA is more complex than mRNA, consisting of a 5’ end containing a CCA (cytosine, cytosine, adenine) sequence and a 3’ end containing a single adenine.
U1 snRNA is a small nuclear RNA molecule with a 5’ cap, a 3’ poly-A tail, and a single-stranded loop. The structure of ribosomal RNA is more complex than the other three RNAs and consists of two major rRNA molecules, 5S rRNA and 28S rRNA.
The 5S rRNA has a 5’ methylated cap and a 3’ poly-A tail, while the 28S rRNA has a 5’ methylated cap and a 3’ end containing a single adenine. All four RNAs are involved in different processes within the cell, and the differences in their structures reflect their different roles in the cell.
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What is the most common body type ectomorph endomorph mesomorph?.
Answers
Nowadays, endomorph is the most common body type. Thus, the correct option is B.
What is Body type?Body type may be defined as the posture or composition of body structure. It is used for the classification of human body shapes according to their appearance.
Endomorph body type represents the body that has more stored fats, and a lot of muscles that gain weight more easily. Nowadays, the situation remains the same and people are more prone to reach circumstances of obesity.
Therefore, it is well described above.
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in the uvr excision repair system in e. coli, which enzyme routinely synthesizes dna to replace the excised strand?
Answers
DNA polymerase I an enzyme routinely synthesizes DNA to replace the excised strand.
An enzyme called DNA polymerase to takes a role in the replication of bacterial DNA. It was the first known DNA polymerase, and Arthur Kornberg discovered it in 1956. It was first identified in E. coli and is found in all prokaryotes.
During lagging-strand synthesis, DNA polymerase I (pol I) processes RNA primers and fills up tiny gaps during DNA repair events. By extending the 3′ ends of an existing nucleotide chain and adding new nucleotides that are identical to the template strand one at a time using the formation of phosphodiester bonds, DNA polymerase adds a new strand of DNA.
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