14. a filter feeding mollusk is the
a. moon snail
b. mussel
c. mud snail
d. whelk

(B) Mussels

Explanation:

Mussels are a filter feeding mollusk.

The mussel circulates its food through its system before eating it. Since the mussel lives in water and it food does as well, the mussel doesn't want to eat tons of water, so it needs to get rid of it as well as the other un-needed things.

option D - Whelks

Explanation:

Whelks are molluscs with a radula on a stalk that can extend beyond the shell and be used to bore into the shells of other molluscs.

Through these holes that they have bored they poke the tip of the radula and suck out the flesh of the victim.

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation: