These are the simplest animals and are diploblastic, which means that they only have two layers of cells, an outer layer and an inner hollow layer that is involved in gathering food. 

A. Mollusca
B. Annelida
C. Jellyfish
D. Arthropoda


C. Jellyfish

Biology & Microbiology

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Complex traits are usually quantified by ____________________ rather than by ____________________

Fill in the blank(s) with correct word

Biology & Microbiology

The energy that fuels most life on earth comes from ____

a. the sun b. heat c. sucrose d. water e. glucose

Biology & Microbiology

The gland that secretes fructose and prostagladins that become part of the semen is the

A. seminal vesicle. D. epididymus. B. bulbourethral gland. E. vas deferens. C. prostate gland.

Biology & Microbiology

A compound contains hydroxyl groups as its predominant functional group. Therefore, this compound _____

A) lacks an asymmetric carbon and is probably a fat or lipid B) should dissolve in water C) should dissolve in a nonpolar solvent D) will not form hydrogen bonds with water

Biology & Microbiology