When copies of chromosomes are made, there is an area where the copies will attach called a _____.
Fill in the blank(s) with the appropriate word(s).
Answer: Centromere
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For a pure culture of Saccharomyces cerevisiae cells that were all derived from a single cell to mate,
A) a mating-type switch in one or more cells in the culture must occur. B) both the ? and the a gene must be fully expressed in the population. C) the ? gene must be fully repressed in the population. D) some cells must exist as diploids.
Which of the following statements about mimicry are true? Check all that apply.
_____ Generally, the number of mimics in a Müllerian mimicry system must be less than the number of models _____ Only Batesian mimicry depends on the ability of the predator to learn. _____ In Müllerian mimicry, the participants are both mimics and models. _____ In Batesian mimicry, the participants are either mimics or models. _____ A Müllerian mimic is "a sheep in wolf's clothing".
Ferns often have small bumps called sori arranged in rows on their undersides. What are these structures?
A) Spore capsules B) Seed capsules C) Nodules containing symbiotic bacteria D) Parasites
The Shannon diversity index would be most valuable to
A. a conservation biologist deciding where to locate a new nature preserve. B. a microbiologist looking for E. coli strains in the drinking water supply. C. a plant biologist calculating evapotranspiration rates of various grass species. D. an ornithologist studying red-tailed hawk populations. E. an agricultural economist studying soybean production.