Homologous chromosomes are held together in the
A) synaptonemal complex.
B) centromere.
C) kinetochore.
D) nucleus.
E) MTOC
A) synaptonemal complex.
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Substances that can readily pass through the cell membrane are chemically ________ in nature.
Fill in the blank(s) with the appropriate word(s).
Genetic drift is most likely to lead to ____
a. artificial selection b. mutation c. the founder effect
d. gene flow e. adaptation
If you were given the task of choosing a biological control agent for a reed from eastern China that has become invasive in the southeastern United States, what do you think would be the best choice? Consider both the effectiveness and the safety of the agent you be releasing.
A. A fungal pathogen from eastern China that specializes on the reed and can kill a plant in a few months. B. A generalist beetle, native to the United States, that can consume massive quantities of the reed in a few weeks. C. A nematode, native to eastern China, that specializes on the reed but can take up to two years to kill a plant. D. A caterpillar, native to the United States, that normally eats close relatives of the weed, but has been found in lab trials to perform better on the Chinese reed.
__________ regulates the maturation of the mammary glands, and then _____ causes contraction of milk glands.
Fill in the blank(s) with the appropriate word(s).