Which of the following convert atmospheric nitrogen to ammonium?
A) nitrifying bacteria
B) nitrogen-fixing bacteria
C) mycorrhizae
D) ammonifying bacteria
B
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Which of the following would you classify as something other than an animal?
A) sponges B) coral C) jellyfish D) choanoflagellates
Tendons and ligaments are made of:
a. loose connective tissue b. dense regular connective tissue c. dense irregular connective tissue d. cartilage e. collagen
This animal has the fewest genes, the simplest
body plan, and only four cell types. It is a
a. planarian. b. placozoan. c. annelid. d. roundworm. e. sponge
The phenomenon of microbial antagonism can be explained by
a. certain normal biota directly kill other species by phagocytosis b. normal biota members change the chemical environment making it hostile to other species c. the immune system only recognizes certain species for destruction d. there is limited space for occupation in or on certain areas of the human body