An oocyte is produced in the ovary during female gametogenesis. The female germ cells produce a primordial germ cell (PGC), which then undergoes mitosis,forming oogonia. During oogenesis, the oogonia become primary oocytes<span>.
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Answer:
i would believe C.
Explanation:
Vestigial structures are structures in animals that are reduced in size to where they are just traces of homologous structures in other species. Examples would include the human tail bone, certain bones in whales and the human appendix.
D flagellum
Flagellum is defined as a slender threadlike structure, especially a microscopic whiplike appendage that enables many protozoa, bacteria, spermatozoa, etc., to swim.
Astrocytes, <span>Star-shaped cells that anchor small blood vessels to neurons.</span>
Answer:
The two major differences lies in the function and support system.
Explanation:
The two major differences between an endocrine and an exocrine system are as follows –
a) An endocrine system releases its produce (hormones) into the connective tissue i.e blood while the exocrine system releases hormones directly into the ducts so that it could reach the targeted tissue directly.
For example – the Adrenal gland is an endocrine gland that secretes adrenaline directly into the blood. The salivary gland is an exocrine gland that releases its produce into the collecting duct leading to mouth. However, Pancreas is both endocrine and exocrine gland.
b) The endocrine system cannot work alone therefore it works in coordination with the nervous system to control actions and balance the body. However, the exocrine system works independently
.