Radula modification allowed all of the following functions in gastropods except  

A.  scraping algae off rocks.
B.  eating vegetation.
C.  boring holes in other mollusk shells.
D.  protecting themselves with nematocysts.
E.  injecting poison through a harpoon-like structure.


D.  protecting themselves with nematocysts.

Biology & Microbiology

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Embryonic stem cells cannot develop into __________ cells

a. muscle b. nerve c. blood d. placental e. other stem

Biology & Microbiology

Double fertilization in an ovule of a flowering plant results in which of the following?

A. Two embryos B. Two seeds in a fruit C. One embryo and one endosperm D. Two fruits joined together E. One endosperm and one cotyledon

Biology & Microbiology

Shown here is a representation of a portion of a pair of schmoos chromosomes



Crossing over would probably be most frequent between
A) hair and legs.
B) hair and eyes.
C) eyes and legs.
D) eyes and arms.

Biology & Microbiology

MacConkey agar plates represent ________ medium

A) a minimal B) a selective C) a differential D) both a differential and a selective E) both a minimal and a selective

Biology & Microbiology