Which of these animals has a unidirectional circulatory system?

a. jellyfish
b. honeybee
c. earthworm
d. snail


c. earthworm

Biology & Microbiology

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Acetic acid gives vinegar its sour taste. Which functional group has acidic properties and would release hydrogen ions in an aqueous (water) solution?

A. -OH B. -NH2 C. -SH D. -COOH E. -CO

Biology & Microbiology

In the case of the Fo complex, the "o" refers to the antibiotic ________, to which the structure is sensitive.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

How do the seeds of angiosperms differ from those of gymnosperms?

What will be an ideal response?

Biology & Microbiology

The dominant stage in the life cycle of tracheophyte plants is the

A. angiosperm generation. B. sporophyte generation. C. spore generation. D. epiphyte generation. E. gametophyte generation.

Biology & Microbiology