Question

Meiosis differs from mitosis because:

1. meiosis occurs only in somatic cells.
2. gene exchange between sister chromatids may occur in prophase I.
3. synapsis over occurs in metaphase I.
4. replication of DNA occurs between meiosis I and II.
5. meiosis begins with one haploid cell and produces four diploid cells.

Compact bone:

1. contains many spaces.
2. is found primarily in the epiphyses of long bones.
3. succumbs to stresses caused by weight and movement.
4. is arranged in units called osteons (Haversian systems).
5. is avascular.

Which of the following are required for proper bone growth?

1. vitamins: A, B12, C, D, and K
2. minerals: Ca and P
3. hormones: IGFs, thyroid hormones, growth hormone, and insulin
4. A and B are correct.
5. A, B and C are correct.

Answer 1

1. B) gene exchange between sister chromatids may occur in prophase I.

Explanation: Synapsis takes place during prophase I of meiosis.

Meiosis occurs only in germ cells.

replication of DNA occurs before the meiosis I

Meiosis begins with one diploid cell and produces four haploid cells.

2. d. is arranged in units called osteons (Haversian systems).

Explanation: Haversian system is characteristics of the compact bone

Bone vascular.

They are primarily found in the diaphysis. Epiphysis contains the spongy bone

3. A , b and C are correct