The purpose of a mordant in the Gram stain is
a. To make the flagella visible.
b. To remove the simple stain.
c. To make gram-negative cells visible.
d. To make the bacterial cells larger.
e. To prevent the crystal violet from leaving the cells.
Answer: e. To prevent the crystal violet from leaving the cells.
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All fungi can form hyphae.
Answer the following statement true (T) or false (F)
Chitons, snails, clams and squid all belong to this phylum:
a. Mollusca. b. Gastropoda. c. Bivalvia. d. Platyhelminthes. e. Cephalopoda.
A community refers to ____
a. the interaction between populations and their environment b. the interaction between species and their environment c. an area in which a single species lives d. all species that live and interact in a specific area e. the nonliving components of an area
The accumulation of dead keratinocytes and the protein ____ on the skin surface forms a waterproof barrier
a. collagen b. elastin c. keratin d. albumin e. myosin