Cartilaginous joints unite two bones by means of ________.
A. capsules
B. cartilage
C. collagen fibers
D. synovial membranes
Answer: B
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In epigenetic inheritance ________.
both homologous chromosomes are inactivated one set of the homologous chromosomes is silenced one allele of a homologous pair is expressed None of the choices are correct.
How does a sagittal plane separate the body?
A. Up from down B. Front from back C. Right from left D. Top from bottom
The acrosome cap contains
A. testosterone. B. nutrients to sustain the sperm. C. enzymes to allow penetration into the oocyte. D. mitochondria to provide energy for movement. E. buffers to neutralize the acidity of the female reproductive tract.
If both ACTH (adrenocorticotropic hormone) and cortisol levels increase, which of the following would occur?
A. ACTH production is increased even more by positive feedback. B. High cortisol levels will begin to cause ACTH levels to decline. C. High ACTH levels will begin to cause cortisol levels to decline. D. Aldosterone levels will increase. E. None of these choices are correct.