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cestrela7 [59]
3 years ago
7

According to the fossil record, which of the following was the first organism on land? 1.amphibian

Biology
1 answer:
SashulF [63]3 years ago
7 0

Answer:

It should be mammal

Explanation:

I hope this helps

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What is alveoli??????<br>explain <br>k.o.i. h​
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Listen to pronunciation. (al-VEE-oh-ly) Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs). The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.

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Organisms that have a membrane nucleus belong in which domain?
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C. Eukaria is the answer

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Which statement correctly compares nucleic acids and carbohydrates?
givi [52]

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The correct answer is They both contain carbon ,but only nucleic acid contain phosphorous

Explanation:

Carbohydrates are also called polyhydroxyaldehydes or polyhydroxyketones.Carbohydrates contain carbon,hydrogen and oxygen.For example glucose(C6H12O6).

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3 years ago
When a singly ionized potassium ion moves through a channel in the membrane passing from the outside to the inside, what is the
Korolek [52]

The magnitude of the work done by the electric field of the membrane is <u>W = 1.28 × 10⁻²⁰ Joules</u>.

We start with the necessity to take into account a value for the voltage present there in order to solve this problem by first considering that the membranes have two layers, one internal and one external, each responsible for producing a potential difference between the two levels.

As a result, in order to find a solution, it is necessary to take into account the potential difference between the two surfaces. In this instance, we'll assume a particular value for the load, but the recipient is free to substitute a different value if they prefer.

The product of the potential difference and the charge is used to define the work that an electric field performs. The charge of the potassium ion will be equal to that of its electron, so,

q = 1.6 × 10⁻¹⁹ Coulombs

Then the Work would be:

W = Vq

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The 80mV potential difference we will have is quantified as follows:

W = (80mV (1V/1000mV))( 1.6 × 10⁻¹⁹ C)

W = 1.28 × 10⁻²⁰ Joules is the amount of work that the membrane's electric field has produced.

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Maintaining the expensive labs required for Making the clones  will the future of developing biotechnology, such as cloning, most likely require of society

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