Recombination between two Alu elements results in deletions. In humans these have often been associated with specific disorders. In a recent study, researchers compared Alu recombination-mediated deletions of humans and chimpanzees
They identified 492 human-specific deletions of this type. Why is this finding important? A) It shows that humans are not as genetically close to chimpanzees as researchers previously thought.
B) It shows how much the chimpanzee genome has changed since the divergence of these two lineages.
C) It shows that the time of divergence of the two lineages is much older than was previously thought.
D) It shows that more deletions have occurred in humans than in chimps.
E) It demonstrates the importance of Alu recombination in shaping genome divergence.
E
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No cases of attenuated polio virus reverting to a neurovirulent strain have been documented.
Answer the following statement true (T) or false (F)
The primary cause of human population growth following the Industrial Revolution was
a. an increase in death rates. b. a decrease in death rates. c. an increase in birthrates. d. a decrease in birthrates e. more children being born to women over 35 years of age.
How do the anterior and posterior pituitary
glands differ?
a. the anterior pituitary produces peptide hormones while the posterior pituitary produces steroid hormones b. the anterior pituitary produces its own hormones but the posterior pituitary doesn’t c. the anterior pituitary is a part of the nervous system; the posterior pituitary is a part of the endocrine system d. the anterior pituitary is controlled by the hypothalamus whereas the posterior pituitary is controlled by the adrenal cortex e. the anterior pituitary is under voluntary control; the posterior pituitary is under involuntary control
The cell wall of bacteria constrains the ________ ________ that results from the osmolarity of the cytoplasmic contents.
Fill in the blank(s) with the appropriate word(s).