In mollusks, which of the following encloses the gills and anus?

a. mantle
b. nacre
c. cuticle
d. clitellum


a. mantle

Biology & Microbiology

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Stomata

a. are found in the root cells. b. may be found scattered anywhere throughout the plant. c. allow the movement of gases into and out of plants. d. prevent the loss of water from plants. e. remain open at all times

Biology & Microbiology

The total cross-sectional area is greatest in which blood vessels?

A) venules B) arteries C) arterioles D) veins E) capillaries

Biology & Microbiology

Which organelle or structure is absent in plant cells?

A) mitochondria B) microtubules C) centrosomes D) peroxisomes

Biology & Microbiology

A protein that relies on protein-protein interactions to stabilize its membrane association is classified as a peripheral membrane protein.

a. true b. false

Biology & Microbiology