The echinoderms are most closely related to the ________.

A. mollusks
B. arthropods
C. flatworms
D. chordates


Answer: D

Biology & Microbiology

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Judy had plaque buildup in her arteries. When one of these ruptured, a blood clot traveled to

her brain where it blocked blood flow, resulting in death of some of the brain cells. This is an example of __________.

a. a stroke b. atherosclerosis c. coronary heart disease d. a carcinogen

Biology & Microbiology

The most likely place where an exoenzyme participates in a chemical reaction is ________.

A. outside of the cell B. within the cell membrane C. in mitochondria D. in lysosomes E. in cytoplasm

Biology & Microbiology

What type of tissue is characterized by adherence to a basement membrane on one side and a free

surface on the opposite? a. connective b. muscle c. nervous d. epithelial e. adipose

Biology & Microbiology

The mutualistic algae that live within the tissues of corals are called ________

Fill in the blank(s) with correct word

Biology & Microbiology