Allopatric populations that are morphologically ____ use ____ resources
a. similar; similar
b. similar; different
c. different; different
d. different; similar
e. unrelated; mimicry
ANSWER: a
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Leguminous plants such as alfalfa, beans, clover, peas, and soybeans all benefit from symbiotic bacteria that leach vitamins into the plant roots
Indicate whether the statement is true or false.
Which is an example of a species with K-selected adaptations?
A. dandelion B. fruit fly C. herring D. bobcat
A scientist hypothesizes that a new drug turns on a certain gene in a skin cell. Which of the following experiments would be the best to test her hypothesis?
A) Use qPCR to measure the initial levels of gene expression in skin cells, treat skin cells with the drug and measure the levels of gene expression, and then compare the two measurements. B) Use qPCR to measure the levels of gene expression in skin cells after exposure to the drug. C) Use qPCR to measure the initial levels of gene expression in muscle cells, treat skin cells with the drug and measure the levels of gene expression, and then compare the two measurements. D) Use qPCR to measure the levels of gene expression in skin cells after exposure to the drug and then add another drug to turn off gene expression and use qPCR to measure the levels of expression.
RBCs are better known as ________ and WBCs are better known as ________.
A. macrophages; neutrophils B. lymphocytes; monocytes C. leukocytes; erythrocytes D. erythrocytes; eosinophils E. erythrocytes; leukocytes