Sympatric speciation commonly occurs through ________ in plants but is more likely to occur through ________ in animals
A) polyploidy; habitat differentiation and sexual selection
B) habitat differentiation and sexual selection; polyploidy
C) asexual reproduction; chromosome duplications
D) self-pollination; polyploidy and other genetic mechanisms
Answer: A
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Edema (swelling) occurs when ________.
a. collagen fibers enlarge as they change from dehydrated to hydrated shape b. areolar tissue soaks up excess fluid in an inflamed area c. reticular connective tissue invades the area d. adipose cells enlarge by pinocytosis
In a leaf, where are the most chloroplasts
found?
a. the phloem b. the palisade mesophyll c. the spongy mesophyll d. the upper epidermis e. stomata
Which of the following results if reproduction occurs
early in the life cycle? a. Population growth rate increases. b. Population size declines. c. Population size is not affected. d. Generation time increases. e. Growth rate remains unchanged.
A (Coulter counter/cytometer/spectrophotometer) can measure changes in the turbidity of a bacterial culture
What will be an ideal response?