Which form of natural selection is most likely to play a role in speciation?
A. stabilizing selection
B. directional selection
C. Natural selection does not lead to speciation.
D. disruptive selection
Answer: D. disruptive selection
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Oxytocin is produced in the ___ and causes
___.
a. anterior pituitary--milk to move into mammary glands b. posterior pituitary--childbirth muscle contractions c. hypothalamus--childbirth muscle contractions d. hypothalamus--the fight or flight response e. anterior pituitary--glucose uptake by cells of the pancreas
Incomplete genetic linkage is far more common than complete linkage. What is the term for gametes produced when recombination shuffles the alleles of linked genes?
What will be an ideal response?
In the embryonic development of flowering plants, the basal cell develops into the:a
apical cell. b. apical meristem. c. suspensor. d. integuments. e. endosperm.
Which of the following can be used to help classify actinomycetes?
A. Phospholipid composition of the membrane B. Cell wall composition C. Percent G + C content D. All of these can be used to classify actinomycetes.