At least two host races of apple maggots have appeared within the past 150 years, suggesting they may be undergoing
____.
a. parapatric speciation
b. allopatric speciation
c. sympatric speciation
d. genetic drift
e. development of a hybrid zone
ANSWER: c
You might also like to view...
Most nutrients are absorbed across the epithelium of the
A. colon. B. stomach. C. esophagus. D. small intestine. E. large intestine.
A scientist is trying to coax stem cells to differentiate into muscle to use as a therapy for muscular dystrophy. He looks at his Petri dish and is excited to see the cells contracting! The cells appear striated and multinucleate. What type of muscle are they?
A. cardiac muscle B. smooth muscle C. involuntary muscle D. skeletal muscle Clarify Question What is the key concept addressed by the question? What type of thinking is required?8 Gather Content What do you already know about muscle tissue? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Unlike herbaceous eudicot stems, monocot stems do not have distinct areas of cortex and pith. Instead,
their __________ functions as the cortex and pith. a. endodermis b. ground tissue c. meristem d. vascular cambium e. periderm
In an uncharged atom, the number of protons and ___________ must be equal.
A) electrons B) neutrons C) neurons D) ions E) particles