DNA that has wrapped around histones and is in a condensed form following interphase is called ________
A) chromatin B) nucleosomes C) karyokinesis D) chromosomes
Answer: D
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Match the correct case study in conservation biology with its animal.
A. fruit bats—introduction of new species B. prairie chickens—loss of genetic diversity C. songbirds—introduction of new species D. whales—pollution E. Lake Victoria cichlids—loss of habitat
Factors that influence population growth but do not change systematically with the density of the population are called density-________ factors
Fill in the blank(s) with correct word
A portion of DNA that encodes a specific protein is
a) a gene. b) a chromosome. c) a chromatid. d) a centromere. e) a kinetochore.
MPF activity was discovered when cytoplasm from a Xenopus M-phase cell was injected into Xenopus oocytes, inducing the oocytes to form a mitotic spindle
In a control experiment, Xenopus interphase cytoplasm was injected into oocytes and shown not to induce the formation of a mitotic spindle. Which of the following statements is not a legitimate conclusion from the control experiment? (a) The piercing of the oocyte membrane by a needle is insufficient to cause mitotic spindle formation. (b) An increased volume of cytoplasm is insufficient to cause mitotic spindle formation. (c) Injection of extra RNA molecules is insufficient to cause mitotic spindle formation. (d) Components of an interphase nucleus are insufficient to cause mitotic spindle formation.