The cladogram below was created to show the evolutionary relationships between different vertebrates.Which of the following inferences can be made, based on this information?

a. Amphibians and birds share a more recent common evolutionary ancestor than sharks and birds.
b. Birds and sharks do not share a common evolutionary ancestor.
c. Having a bony skeleton did not provide an evolutionary advantage to sharks or ray-finned fish.
d. Rabbits and primates diverged more recently than crocodiles and birds.

Answers

Answer 1

Answer:

Answer: a. Amphibians and birds share a more recent common evolutionary ancestor than sharks and birds.

Explanation:

A cladogram is a diagrammatic representation of the phylogenetic relationship of recently evolved species with their common ancestors. The relationship is defined on the basis of genetic, molecular, morphological make up of the organisms. The node in the cladogram defines a divergence or difference between the two taxon.

Birds and amphibians share a more recent common ancestor than shark and birds because they can be seen lying closer at the terminal ends of the cladogram.

Answer 2

Answer: The answer for the given question above about a cladogram showing the evolutionary relationships between different vertebrates is option A. Amphibians and birds share a more recent common evolutionary ancestor than sharks and birds. I hope this helps.

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Commercial plant growers artificially control the lengths of days and nights. This produces a response calledA. photoperiodism.
B. gravitropism.
C. thigmotropism.
D. phototropism.

Answers

The answer is A. photoperiodism.

Photoperiodism is an organism reaction to the lengths of days and nights. Some plants require longer days, and some require shorter days. By changing the lengths of days and nights, commercial plant growers are able to increase plants productivity.

Tropism is plant growth in a response to a stimulus.
As it name suggests, phototropism is plant growth in a response to light.
Gravitropism is plant growth in a response to gravity.
Thigmotropism is plant growth in a response to contact

the answer is A. Photoperiodism

Hope this helps!

Inside a prokaryote such as e. coli, an opera on controls for the production of the amino acid tryptophan. what occurs in the cell in order to turn off the production of tryptophan.

Answers

Trp operon is regulated so, that when tryptophan is present in the environment, the genes for tryptophan are not expressed.

Which equation has a constant of proportionality equal to 4? a . 4y= 4x
b. 4y = 12x
c. 3y = 4x
d. 3y= 12x

Answers

the equation that has a constant proportionality equal to 4 is : D. 3y = 12x

3y = 12x

y = 12x / 3

y = 4x

Hope this help you out

Which equation has a constant of proportionality equal to 4?

Answer: Out of all the options presented above the equation that has a constant of proportionality equal to 4 is answer choice D) 3y= 12x. The reason being that if we simplify it we get that y = 4x.

I hope it helps, Regards.

How are mitosis and meiosis different from each other? A.
Meiosis produces gametes and mitosis produces cells for the organism to grow and repair itself.

B.
Mitosis produces sperm and egg cells and meiosis produces cells for the organism to grow and repair itself.

C.
Mitosis produces four daughter cells and meiosis produces two daughter cells.

D.
Mitosis produces four different cells and meiosis produces identical cells.

Answers

Meiosis produces gametes and mitosis produces cells for the organism to grow and repair itself.

In a certain ecosystem, the number of cheetahs is lower as compared to their prey, gazelles. If the cheetahs disappeared from this ecosystem, then the number of gazelles will increase. This will disrupt the ecosystem of the forest because the gazelles will compete for limited food resources and possibly exhaust them. In this scenario, what type of species are cheetahs?

Answers

Answer:

a keystone species

Explanation:

A keystone species is a species that plays a key role in the balance of the entire ecosystem. Some examples of keynote species that are critical for their ecosystems include sharks, African elephants, sea otters, etc. The most important feature that defines a keynote species is the fact that these species have a huge influence on the food web dynamics. Moreover, keystone species are also characterized by a low functional redundancy (ie., they cannot be replaced by other species within the ecosystem).

Why must all conditions except the independent variable be held constant for all experimental treatments?

Answers

Uhm... I believe you mean a situation when we examine a relation between two variables. In this case all other conditions must remain as constant as possible because they could affect a result and then the conclusions could be false. ie. you examine a relation between temperature and frequency of cell division/organism's activity, then you should stabilize air pressure, food composition, bacterial flora in experimental room... etc. of course when you conduct research in a field, ie. ecological research you can't do any of that but then you are obliged to explain possible aberrations of your results in an article's discussion.

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