Which vitamin is found in leafy green vegetables and is necessary for proper blood clotting?
a. vitamin D
b. vitamin E
c. vitamin K
d. vitamin A
e. thiamin
ANSWER: c
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Which of the following methods to enumerate cells often requires specialized staining to observe non-pigmented bacteria?
A) spectrophotometry/turbidity B) spread-plating C) microscopy D) spread-plating, turbidity, and microscopy
Valium is a drug that causes voltage-gated Cl- channels to open. What effects would this cause in a postsynaptic
membrane?
What will be an ideal response?Which of the following characteristics distinguishes birds from reptiles?
a. Reptiles have only one single middle ear bone, while birds have two or more. b. The shape of their occipital condyles allows birds to rotate their heads more than reptiles can. c. Birds are endothermic. d. Birds and reptiles have distinctly different jaw bone morphologies.
An organism is heterozygous for two pairs of genes. The number of combinations of alleles that can form from these two genes in the organism's gametes is _____
Fill in the blank(s) with the appropriate word(s).