Estrogen is a lipid-derived hormone.
(a steroid)
Answer:
The correct answer is - option D. adrenergic receptor.
Explanation:
Adrenergic receptors are present on or in the effector cells that are specific molecular structures. The adrenergic receptors are glycoproteins that are present on the cell surface that binds and recognize with the various hormones or drugs such as norepinephrine or epinephrine and others.
These are the receptors that are sympathetic tissue receptors that get drugs or hormones released from the sympathetic nerve endings and the adrenal glands.
Thus, the correct answer is - option D. adrenergic receptors.
Fish, reptiles, birds, and mammals have very similar embryos with gill slits and tales, but all but fish get rid of the gills as they mature
Animal cells contain dna enclosed in the nucleus
The answer is B because:
Cell walls are made of cellulose and proteins (hence II).
Animal cells don't have cell walls (only cell membrane) but plant cells do so IV
They must be semipermeable since materials for example carbon dioxide and water for photosynthesis have to go into the cell <em>some</em> way.
