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Ymorist [56]
4 years ago
11

Which of these is a starting point for primary succession? A) a surface exposed by a retreating glacier B) abandoned farmland C)

an abandoned city D) a neglected yard E) none of the above
Biology
1 answer:
blsea [12.9K]4 years ago
4 0

Answer:

surface exposed by a retreating glacier - A)

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When NADH passes its electrons into the Electron Transport System, NADH is chemically:
erik [133]

Answer:

Option D, oxidized

Explanation:

The NADH gets oxidised when it passes its electrons into the Electron Transport System

Oxidization is a process in which one element or compound loses its electron to other chemical element or compound thereby itself getting oxidised and reducing the other one (the one who gains the electron).

Here in the electron transport system, the NADH loses or donates its electron to the Electron Transport System thus chemically it gets oxidized.

Hence, option D is correct

8 0
3 years ago
How many chromosomes do each ending cell of meiosis contain
Viefleur [7K]

(See figure below, where meiosis I begins with a diploid (2n = 4) cell and ends with two haploid (n = 2) cells.) In humans (2n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I (n = 23).

4 0
3 years ago
Read 2 more answers
When plants make flowers, gene A is expressedin whorls 1 and 2, gene B is expressed in whorls 2 and 3 and gene C in whorls 3 and
Sati [7]

Answer:

The correct answer would be option D) no gametes.

Explanation:

The ABC model of the flower was formulated to describe the collection of genetic procedures that determines floral organs in several plants. These species consist of four whorls which are sepals, petals, stamens, and carpels. These whorls are expressed by the expression of a number of genes present in each whorl or verticli.

Gene A is solely responsible for the sepals while the co-expression of A and B genes are responsible for the petals. The identity of the stamens is expressed by B and C and the carpels require C and D genes to be active.

The homozygousity for a normal mutation in gene C will lead to inactive or lack stamens and carpels, which are male and female reproductive organs. These are an important structure for forming gametes.

Thus, the correct answer would be option D) no gametes.

3 0
3 years ago
If a label indicated the presence of a radioactive isotope, you would know what
Citrus2011 [14]

Answer:

Radioisotopes are radioactive isotopes of an element

Explanation: Radioactive isotopes are detected by: photographic film.

a cloud or bubble chamber.

a liquid scintillation detector.

a Geiger-Muller counter.

5 0
3 years ago
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Cells need energy to function, but also need to be able to heal and grow for a person to be healthy. Which of the following desc
just olya [345]

Answer:

B. Oxygen molecules recombine to allow cells to get larger

8 0
3 years ago
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