Slime molds are nonphototrophic protists that
a. contain cell walls.
b. can form fruiting structures.
c. can form masses of protoplasm.
d. can form either fruiting structures or masses of protoplasm.
Answer: d. can form either fruiting structures or masses of protoplasm.
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Match the following items to the correct phrase.
_______1. Bacteria without cell walls. _______2. Acid-fast bacteria. _______3. Curved, Gram-negative bacilli. _______4. Spore-forming bacteria. _______5. Bacteria having complex nutritional requirements. a. Fastidious bacteria b. Mycoplasma spp. c. Clostridium and Bacillus spp. d. Mycobacterium and Nocardia spp. e. Vibrio species
A group that contains species from separate evolutionary lineages is
a. paraphyletic. b. polyphyletic. c. monophyletic. d. haplophyletic. e. multiphyletic.
What two gases have a profound effect on the type of organisms that can live in an area and influences the regions carrying capacity?
a. Carbon dioxide and nitrogen b. Carbon dioxide and bicarbonate c. Oxygen and carbon dioxide d. Oxygen and nitrogen
Why are cells considered to be the smallest unit of life?
A. Because you need a microscope to see them B. Because a cell is the smallest thing that carries out all the functions of life C. Because they have an organized structure D. Because all cells have a nucleus with DNA