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iogann1982 [59]
3 years ago
10

Can you tell from this tree whether a C at position 15 evolved before or after a T at position 15? Explain your answer

Biology
1 answer:
Ratling [72]3 years ago
7 0

The evolutionary tree is not observed here but it is possible to answer this question by observing which nucleotide is found in the root of the node. It indicates the first substitution.

<h3>What is an evolutionary tree?</h3>

A phylogenetic evolutionary tree is a diagram used to show the evolution of a given taxonomic group (for example, a group of species).

It is possible to trace the evolution of a given taxon by tracing the nucleotide substitution observed from a common ancestor.

In an evolutionary tree, the root of the node is represented by the common ancestor and therefore the presence of a particular nucleotide (either T or C) in that position can be considered as the ancestral character.

Learn more about evolutionary trees here:

brainly.com/question/2189834

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Archaea differ from bacteria in that archaea Archaea differ from bacteria in that archaea use organic compounds for food. lack n
Deffense [45]

Answer:

The correct answer is- have diverse cell wall composition

Explanation:

Bacteria and archaea are both prokaryotes because they both lack membrane-bound nucleus and other membrane-bound organelle. There are differences between bacteria and archaea which allow their differentiation into two different domains.

One of the main difference is the difference in their cell wall. The cell wall of bacteria is made up of peptidoglycan and the cell wall of archaea is made up of pseudo-peptidoglycan.

In peptidoglycan N-acetylglucosamine and N-acetylglucosamine are the two sugars but in archaea N-acetyltalosaminuronic acid (NAT) replaces NAM.

3 0
3 years ago
Which photosystem releases the electrons for the electron transport chain?
WARRIOR [948]

Answer:

B

PSII

Explanation:

good luck have a nice day

8 0
3 years ago
Positive feedback in a system is
musickatia [10]

Positive feedback in a system is a benefit for the entire system

Answer: Option B

<u>Explanation:</u>

The positive mechanism is a stimuli that the body exhibits when in time of need which actually benefits the entire system. When required the positive feedback runs to rescue and neutralize the effect caused by the negative impact which paves a way to maintain equilibrium throughout the body.

Many examples can be cited for this like blood clotting, during labor and even in ripening of fruits. Positive and negative feedback work hand in hand to maintain homeostasis in place. Positive feedback is required to enhance the system while the negative feedback is to inhibit the activity.

5 0
3 years ago
1. What is the relationship among chromosomes, genes, and DNA?
Lyrx [107]
I think it’s b hopefully it helps
7 0
3 years ago
Read 2 more answers
Help please , giving out lots of points
Annette [7]
<h2>Answer:</h2>

Following are the examples of the given associations:

  1. Mutualism- Oxpecker and rhinoceros.
  2. Commensalism- Birds and tree.
  3. Parasitism- Sashimi and round worm.
<h2>Explanation:</h2>
  1. <u>Mutualism</u>- It is a the interaction of two organisms of two different species in which each of them gets benefited from each other. For example- Oxpecker eats the ticks, pests and other parasites present on the body of Rhinoceros and hence both of them get benefited as the oxpecker gets food and in return rhinoceros gets pest control.
  2. <u>Commensalism</u>- it is a association in which two organisms get interacted in which one get benefited and the other is neither benefited nor harmed. For example birds living on trees generally do not harm tree in any case but in return gets food and shelter from the tree.
  3. <u>Parasitism</u> in aquatic environment- it is defined as the interaction of two organisms in which a organism lives in or on other organism of another species (its host) and benefits by deriving nutrients from the host at the host's expense. For example round worm or tapeworm obtain food and even complete their life cycle inside fishes like Sashimi and harms them.

Result: The above are the examples of the given associations.

6 0
4 years ago
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