________ are organelles in the cells concentrated around the mouth and tentacles of cnidarians and contain toxins to penetrate and stun prey.

a. Spicules
b. Nematodes
c. Nematocysts
d. Polyps


c. Nematocysts

Nematocysts are organelles in the cells concentrated around the mouth and tentacles of cnidarians and contain toxins to penetrate and stun prey.

Biology & Microbiology

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The decline of the eugenics movement in the U.S. in the early 20th century resulted from ____

a. breakthroughs in genetic technology b. violent protests by the medical community c. the ability to manipulate gene expression d. social outrage at the number of deaths caused by botched sterilizations e. its misuse for social and political purposes by the Nazis

Biology & Microbiology

In Frits Went's coleoptile experiment,what was the most likely phytohormone transported from the coleoptile tip into the agar block?

(a) Brassinosteroid (b) Gibberellic acid (c) Ethylene (d) Auxin (e) Abscisic acids

Biology & Microbiology

The allergic response is primarily mediated by ________ antibodies.

A. IgA B. IgM C. IgE D. IgG E. IgD

Biology & Microbiology

The ________, or thrombocytes, play a vital role in clotting

Fill in the blank(s) with correct word

Biology & Microbiology