Which members of Platyhelminthes are parasitic?

a. Planarians and cnidarians
b. Flukes and planarians
c. Flukes and cnidarians
d. Planarians and tapeworms
e. Flukes and tapeworms


e

Biology & Microbiology

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Cartilaginous fishes retain __________ in their body, so they do not lose or gain water by osmosis. Fill in the blank(s) with the appropriate word(s)

Biology & Microbiology

Target cells

a. are found only in specific endocrine glands. b. are equipped with specific receptor molecules. c. are never muscle cells. d. may occur in any part of the body. e. are equipped with specific receptor molecules and may occur in any part of the body.

Biology & Microbiology

Hair is made up mostly of

a. calcium b. keratinized cells. c. carbohydrates. d. fats. e. chitin.

Biology & Microbiology

Cellulose in the cell wall is a primary energy store for plants.

Answer the following statement true (T) or false (F)

Biology & Microbiology