True or False: Acidophiles maintain a cytoplasmic pH below 5.5

a. TRUE
b. FALSE


Answer: B

Biology & Microbiology

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When crossover occurs, the result is:

A. 4 chromosomes, all nonrecombinant. B. 4 chromosomes: 3 nonrecombinant and 1 recombinant. C. 4 chromosomes: 2 nonrecombinant and 2 recombinant. D. 4 chromosomes: 1 nonrecombinant and 3 recombinant. E. 4 chromosomes, all recombinant.

Biology & Microbiology

Allopatric populations that are morphologically ____ use ____ resources

a. similar; similar b. similar; different c. different; different d. different; similar e. unrelated; mimicry

Biology & Microbiology

The Chlorophyta are believed to be the ancestors of fungi and animals

Indicate whether the statement is true or false.

Biology & Microbiology

Why are epithelial membranes not very thick?

A. Epithelial tissues can only reach a certain thickness because their growth is constrained by microtubules inside the cell membrane. B. Thick epithelial tissues would collapse due to the drying effect of the environment. C. Epithelial tissues are programmed to stop dividing after only a few cell cycles. D. Epithelial tissues are required to support other cells growing on top of the tissue. E. Epithelial tissues play a critical role in transport and must be thin to allow diffusion to occur.

Biology & Microbiology