Ascientist has discovered a new gene in oysters. oysters with the dominant allele for disease resistance 'r' have been found to tolerate polluted waters better than oysters with the recessive 'r' allele. what term is used to describe an oyster that has two identical dominant alleles (rr) for this gene? a) genetic hybrid b) homozygous dominant c) heterozygous dominant d) heterozyous recessive

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above