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Fed [463]
4 years ago
6

A researcher is trying to construct a molecular-based phylogeny of the entire animal kingdom. Assuming that none of the followin

g genes is absolutely conserved, which of the following would be the best choice on which to base the phylogeny? A) genes involved in chitin synthesis
B) collagen genes
C) genes involved in directing segmentation development
D) genes involved in eye-lens synthesis
Biology
1 answer:
faust18 [17]4 years ago
3 0

Answer:

Collagen genes.

Explanation:

Phylogenetics helps to study the evolutionary relationship among the different group of organisms. The different characteristics like DNA sequences, mitochondria sequences can be used for the construction of phylogeny tree.

Collagen genes can be used to study the evolutionary relationship as mammals contains nearly 30% of total protein. The collagen gene shows the most of the conserved sequences among the different group of organisms and shows the most recent evolved characters in vertebrates.

Thus, the correct answer is collagen genes.  

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All of Earth's biomes and ecosystems, except the most remote, are affected by the impact that humans have made on the environmen
irina [24]

Answer:

b. False

Explanation:

All biomes, even the most remote, are affected by the impact humans have on the environment.

Humans have been causing deforestation, pollution, agricultural expansion, mining, desertification, extinction of animals and plants, burning and other practices that have had extremely negative impacts on biomes around the world. In addition, all the pollution and exploitation of nature that humans have caused has caused harmful climate change that has affected even the most remote biomes.

The biome is a large set of interconnected ecosystems. Ecosystem, in turn, is an ecological system where there is life and interaction between living beings in a given space, and can vary in size, from a puddle to a large forest.

7 0
3 years ago
A rabbit is caring a dominant allele for brown hair (B) and recessive allele for white hair (b) what’s the rabbits genotype
kifflom [539]

Answer:

B b

Explanation:

hope this helps

4 0
4 years ago
Read 2 more answers
Do carbon dioxide molecules go into or out of the cell ?
Ray Of Light [21]
We inhale oxygen, in which is carried around the body for cellular respiration. To answer your question, carbon dioxide molecules are converted from oxygen therefore, it technically goes out of the cell.
6 0
3 years ago
Bethany thinks her dog is overweight so she switches the dog to a new brand of food for overweight dogs. the switch in dog food
gtnhenbr [62]

In psychology, the manipulation is described a change done, in order to obtain a certain result, but this does not guaranty that the result would be seen in future.  

In this case, the lady (Bethany) switches the diet of the dog. She thinks that switching the food of the dog can help the dog to lose weight. This may or may not be true.  

So, this case is an example of manipulation.  


5 0
3 years ago
Under certain conditions, cytochrome c can trigger apoptosis, or programmed cell death, by activating cytosolic proteins known a
Pachacha [2.7K]

Answer:

A) Cytochrome C reduction in healthy cells B) Cytochrome cause the oligomerization of APAF1 that cause the activation of Caspase-9, which activates the Caspase-3 and Caspase-7 that ultimately lead to apoptosis.

Explanation:

Apoptosis is the programmed cell death which is performed to get rid of unnecessary and damaged cells through biochemical changes in higher animals. In apoptosis the cell shrinks, cytoskeleton collapse, nuclear membrane disassemble and DNA break into fragments.

a) Cytochrome C is present in intermembranel spaces of mitochondaria and the heme group of cytochrome C accepts electrons from Complex bc1 and transferr to complex IV.<em> Thus as the healthy cells requires proper energy to perform its regular functions the cytochrome keep reducing rapidly in it and this inhibit the cytochrome to initiate the apoptosis in healthy cell.</em>

B) Cytochrome C is released from mitochondria in apoptotic cell and it cause the oligomerization of the inactive Apoptosis protease activating factor-1. It form apoptosome complex with APAF1 that initiate and activate the caspases. These caspases are then involved in degradation of protein.

7 0
3 years ago
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