Acharacteristic of most mollusks is
a. an endoskeleton.
b. a two-part body plan.
c. the absence of a body cavity.
d. bilateral symmetry.

What statements describe a host organism?

Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.

As the human population grows, what happens to our natural-resource requirements? o they increase o they decrease o they do not change. they go in cycles