Armadillos have a diploid chromosome number of 64. At prophase I, an armadillo's cell would have ____ tetrads present.
A. 56
B. 32
C. 78
D. 64
Answer: B. 32
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The receptors for steroid hormones are located inside the cell instead of on the membrane surface like most other signal receptors. This is not a problem for steroids because _____
A) the receptors can be readily stimulated to exit and relocate on the membrane surface B) steroids do not directly affect cells but instead alter the chemistry of blood plasma C) steroid hormones are lipid soluble, so they can readily diffuse through the lipid bilayer of the cell membrane D) steroids must first bond to a steroid activator, forming a complex that then binds to the cell surface
Certain traits will have been lost from the gene pool forever. Some may be obvious, like people with red hair or double jointed thumbs. Others will be less obvious, like the ability to process cholesterol or being allergic to peanuts. This loss of diversity in a reduced population is called ________.
A) gene flow B) genetic drift C) bottleneck effect D) founder effect
Which group of fungi has hyphae that are multinucleate and not divided by septa?
a. monokaryotic b. unicellular c. ascomycete d. coenocytic e. sporophyllous
Which of the following does NOT affect eukaryotic cells?
A) antiprotozoan drugs B) antihelminthic drugs C) antifungal drugs D) nucleotide analogs E) semisynthetic penicillins