What are small extrachromosomal pieces of dna found in bacteria?.

Which kind of organism does not generally require oxygen or sunlight to live?

gregori [183]

Answer is A.

Archaea requires neither sunlight for photosynthesis as do plants, nor oxygen. Archaea absorbs CO2, N2, or H2S and gives off methane gas as a waste product the same way humans breathe in oxygen and breathe out carbon dioxide. An example is chemosynthetic bacteria by sea drifts. They use chemical energy to produce vital processes to live.

3 0

3 years ago

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Which of the genotypes below are purebred?

sukhopar [10]

Answer:

DD TT

Explanation:

They are the same and capital

7 0

3 years ago

Differentiated cells in a multicellular organism tend to behave differently from stem cells. The process of differentiation alte

anzhelika [568]

Given what we know, we can confirm that the process of differentiation alters the cells by changing the expression of genes in a cell.

<h3>What is differentiation?</h3>

differentiation is when a cell becomes specialized.
This is the case with heart or digestive cells.
Since all cells carry the same DNA, this does not account for differentiation.
Instead, this is achieved by changing the expression of genes in a cell.

Therefore, we can confirm that differentiation is what we refer to as a cell becoming specialized in one way or function, such is the case with heart cells or digestive cells, and since all cells in the body carry the same DNA, this is done by changing the way in which the cells express their genes in the DNA.

To learn more about differentiation visit:
brainly.com/question/6977275?referrer=searchResults

8 0

3 years ago

I study the details of protein molecules on the surface of a cell, a biologist would really likely use a A. Scanning electron mi

cupoosta [38]

The answer is C.Scanning electron microscope

8 0

4 years ago

A student does an experiment for a science fair to study whether temperature affects the timing of a cricketâ€™s chirps. The stu

nexus9112 [7]

The frequency of chirps increases as the temperature increases. The correct option is B. The chirps occur closer together as the temperature increases.

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<h2>Available data:</h2>

<h3>Data recorded by the student </h3>

Day Temperature Average time between chirps (sec)

1 21 2. 5

2 22 2. 6

3 23 2. 2

4 24 2. 3

5 25 2. 0

6 26 1. 8

7 27 1. 9

8 28 1. 8

9 29 1. 4

10 30 1. 2

11 31 1. 5

12 32 1. 1

In this experiment the student recorded the time in seconds between chirps.

We can see that as the temperature increases, in general, the time between chirps decreases.

At 21ºC the time between chirps is 2.5 seconds

At 26ºC the time between chirps is 1.8 seconds

At 32ºC the time between chirps is 1.1 seconds

According to this information, if the average time between chirps decreases with the temperature increase, we can assume that the frequency of chirps increases as the temperature gets higher.

<h3>Options,</h3>

A) The higher the temperature, the fewer chirps there will be in 10 seconds.

Wrong. The number of chirps in 10 seconds will depend, not only on the frequency but also on how long the chirps last. Since the student did not record the time of chirps, we can not make this conclusion.

B) The chirps occur closer together as the temperature increases.

True. The chirps increase in frequency as the temperature increases, so they occur closer together.

C) The chirps become farther apart as the temperature increases.

Wrong. We can see how the time between chirps decreases as temperature increases, meaning that they are closer not farther.

D) There is no relationship between temperature and the time between chirps.

Wrong. If we make a graph we will see the tendency and the relationship between chirps and temperature.

Graphs usually explain the relationship between variables. In this example, the relationship would be inverse.

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3 years ago