What is the name of the muscle that is responsible for blinking and winking?
A. latissimus dorsi
B. extensor digitorum
C. pectoralis major
D. trapezius
E. orbicularis oculi
Answer: E
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When the SRY gene of the Y chromosome becomes active (around 7 weeks),
a. the Müllerian and Wolffian ducts both develop into male reproductive structures. b. the Müllerian ducts develop into male reproductive structures and the Wolffian ducts disappear. c. the Müllerian ducts disappear and the Wolffian ducts develop into male reproductive structures. d. the Müllerian and Wolffian ducts both disappear. e. the Müllerian and Wolffian ducts both develop into female reproductive structures.
What is one current limitation of whole-genome sequencing for personalized cancer treatment?
A) The human genome is too large to be sequenced for individual patients. B) Drugs may not exist to target the mutant genes that are identified. C) Whole-genome sequencing reveals only mutations in coding sequences, and regulatory mutations may also be important. D) The genomes of cells with abnormal karyotypes, such as cancer cells, cannot be sequenced reliably.
The most common cause of low sperm count in males is _____
a. varicocele b. undescended testicles
c. testicular failure d. semen disorders e. obstructions
Who, along with Alfred Wallace, formulated the theory of natural selection?
A) Charles Darwin B) James Watson C) William Harvey D) Gregor Mendel E) Louis Pasteur