Answer:
b. Hiccupping is a vestigial reflex that suggests a common ancestry between humans and amphibians.
Explanation:
Hiccupping refers to an involuntary contraction of the diaphragm that usually occurs several times per minute. Some research has suggested that hiccuping is an evolutionary remnant of amphibian respiration. This is because the mechanism is remarkably similar to the way tadpoles gulp air and water across their gills. This would mean that hiccups exist due to an antecedent to modern lung respiration.
Explanation:
The cell nucleus is a membrane-bound structure that contains a cell's hereditary information and controls its growth and reproduction. The main function of the cell nucleus is to control gene expression and mnedite the replication of DNA during the cell cycle.
Answer:
B, Different granulation sizes of black powder
Explanation:
A muzzleloader firearm is a firearm that has a muzzle through which the propeller and the projectile is loaded from. For muzzleloader firearms, Fg, FFg, FFFg and FFFFg are examples of Different granulation sizes of black powder. The number of F's represent how the black powder is grounded, FFFFg is the smoothest and is used for muzzleloading rifles of 45 caliber and smaller. FFG is less smooth and is used in muzzleloading rifles larger than 45 caliber while FG is the most coarse used in large bore shotguns.
Answer:
Plant hormonal regulation differs from animal hormonal regulation in that there are no dedicated hormone-producing organs in plants as there are in animals.
Explanation:
<em>Plant hormones control different functions in plants such as growth and development.</em> These hromones are signal molecules that affect gene expression and transcription levels. What diferentiates them from animals is that in plants there are no dedicated hormone producing organs. For example, that plants and insects produce their hormones differently.
