The major food producers for other living organisms is/are
A) higher plants.
B) cyanobacteria.
C) algae.
D) higher plants and algae.
E) higher plants, cyanobacteria, and algae.
E
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At which human developmental stage does sexual maturation occur?
a. embryo b. fetus c. newborn d. pubescent e. adult
Where does normal fertilization of an egg by a sperm in a human female occur?
A. at the ovary upon ovulation B. in the uterus after the egg has implanted C. in the uterus before the egg has implanted D. near the cervix before the egg leaves the female E. in the Fallopian tube
Humans gain the least amounts of water by what
route(s)? a. metabolism b. ingestion of liquids c. ingestion of solids d. ingestion of liquids and of solids e. all of these contribute equal amounts of water
Balantidium coli uses ________ to penetrate the intestinal mucosa
A) adhesion discs B) flagella C) cilia D) pseudopodia E) suckers