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Elina [12.6K]
3 years ago
8

Which statement about cell membrane is false? A. The cell membrane has 2 layers. B. The outside of the cell membrane is hydrophi

lic. C. The cell membrane is semipermeable. D. The cell membrane is made primarily of carbohydrates.
Biology
1 answer:
MaRussiya [10]3 years ago
7 0
I believe it’s C, but if it’s wrong please correct me, but I think it’s C !
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I need help with this (#20)
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Answer:

a Anaphase I

b Metaphase I

c Telophase I

d Anaphase II

e Prophase I

f Telophase II

Explanation:

Prophase I begins after the DNA has been duplicated, as shown in picture e. The chromosomes are condensed, and also visible, which is apparent in picture e.

The next stage is called Metaphase I, in which the pairs of homologous chromosomes align at The the centre of the cell and the spindle fibres attach, as shown in picture b.

The pairs of chromosomes are pulled apart to opposite poles of the cell by the spindle fibres., as shown in picture a. This stage is called Anaphase I.

Then, a process called Telophase I occurs, when the cell divides into two daughter cells. One of these cells is shown in picture c.

Picture d shows the stage Anaphase II, where the spindle has attached and the chromatids are pulled to the opposite poles of the cell.

The final picture left is picture f, which shows the daughter cell at the end of meiosis II, where the nuclear envelope is reforming, as in telophase II.

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3 years ago
Which pair of nitrogenous bases will form a bond in a DNA molecule?
sashaice [31]
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cytosine to guanine
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6 0
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Why do populations have variation of certain traits
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The ability of Salmonella to produce H2S is one characteristic that helps differentiate it from Shigella.
Goryan [66]

KIA tubes and SIM tube in this exercise to determine whether or not your unknown produced H2S.

<h3>What gas is produced by Salmonella?</h3>

F0F1 ATP synthase activity is necessary for Salmonella typhimurium to produce hydrogen sulfide and fermentative gases.

<h3>H2S production by Salmonella enterica?</h3>

Infections with Salmonella enterica continue to have a serious impact on global public health. H2S-negative Salmonella have lately surfaced, despite the fact that the capacity of S. enterica to produce H2S is an essential phenotypic trait utilized to screen and identify Salmonella with selective media.

<h3>H2S is it produced by Shigella?</h3>

Shigella do not create H2S, hence colonies on Hektoen agar appear bluish-green rather than having the black center seen with Salmonella. Shigella are comparatively biochemically inactive and do not ferment lactose or xylose.

learn more about Salmonella here

<u>brainly.com/question/14326716</u>

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the question you are looking for is

The ability of Salmonella to produce H2S is one characteristic that helps differentiate it from Shigella. List the three opportunities you had in this exercise to determine whether or not your unknown produced H2S.

KIA tubes and SIM tube

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