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Anton [14]
3 years ago
12

Two aligned sequences fo the same gene differ by four substitutions, all transitions, two more sequences for the same gene also

differ by found substitutions, two transitions and two transversals. which pair of sequences has probably been evolving independently longer and how do you know?
Biology
1 answer:
Ganezh [65]3 years ago
5 0

Answer:

The first pair of sequence.

This is because transitions are interchangeable of two ringed purines A to G or of one ringed pyrimidine C to T they therefore involves bases of similar shapes.

Transition mutations are generated at higher frequency than transformation which is interchangeable of purines for pyrimidine bases which involves exchange of one ring and two ring structures.

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<h2><u><em>The central vacuole</em></u></h2>

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The food web shows a salt marsh ecosystem Which food chain does not show a way in which energy flows through this ecosystem?
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A

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Which term best describes the number of calories the body uses at rest??
Sever21 [200]
The choices can be found elsewhere and as follows:

<span>body mass index
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I believe the correct answer is the second option. The term that describes the <span>number of calories the body uses at rest would be basal metabolic rate. Hope this answers the question. Have a nice day.</span>
4 0
3 years ago
Read 2 more answers
The effects of epinephrine are typically observed within _________ following administration. Select one: a. 30 minutes b. 1 minu
goldenfox [79]

The effects of epinephrine are typically observed within 1 minute following administration.

<h3><u>Explanation:</u></h3>

The chemical that is used for the purpose of making blood vessels to be narrower and opening the airways in the human lungs are the Epinephrine. This can be used for reversing the low BP, skin itching problems, reactions based on allergy, wheezing problems,etc.

The effects of this chemical will be observed within the period of 1 minute. It is also called as adrenaline which is a hormone released by the adrenal glands. The blood pressure, anger and fear are some of the things that are associated with the release of this hormone.

4 0
3 years ago
Why does pulse (and breathing rate) increase during exercise? (relate to cellular respiration)
Mumz [18]

Answer:

Explanation:

During exercise, the rate of breathing increases in order to fulfill the needs of oxygen required by the body for the release pf energy required.  The body activity and muscles are in movement and required more energy than at rest.  The absorbance of oxygen in to the blood increases which will increase the heart beat and also carbon dioxide starts removing from the blood.  the lungs  must provide more oxygen to the blood during the exercise.

so as the activity level increases, the demand for oxygen increase which will increase the breathing to take in more oxygen from outside in to lungs so that the lungs pump more oxygen to the hearth which will deliver to the muscles for activity.

6 0
3 years ago
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