Rotifers obtain their food by the action of

(a) tentacles.
(b) cilia on the wheel organ.
(c) a muscular pharynx.
(d) pseudopodia.


(b) cilia on the wheel organ.

Biology & Microbiology

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Learning that occurs in the absence of any particular outcome such as reward or punishment is called ____ learning

Fill in the blank with the appropriate word.

Biology & Microbiology

Why are antibodies important to immunity?

What will be an ideal response?

Biology & Microbiology

The stage of human development that occurs from implantation to about 8 weeks after fertilization is the

A. zygote. B. morula. C. gastrula. D. fetal stage. E. embryonic stage.

Biology & Microbiology

The primary function of the leaf structure labeled 5 in Figure 9-1 is:

a. food storage.
b. photosynthesis.
c. water transportation.
d. gas exchange.
e. nutrient absorption.

Biology & Microbiology