________ observations are supported by factual information, while ________ observations involve personal judgment.
A. Objective; analytical
B. Subjective; theoretical
C. Subjective; analytical
D. Objective; hypothetical
E. Objective; subjective
Answer: E
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As global temperatures increase, Arctic sea ice
becomes thin and breaks up earlier each spring. What potential consequence described in the text might this directly lead to?
a. fewer migratory birds b. polar bears being stranded on ice flows far from land c. further global warming d. a decrease in Arctic sea levels e. an increase in polar bear populations
When metapopulation theory is extended to examining interactions among species, it is termed
A) edge effect. B) island biogeography. C) metacommunity. D) matrix ecology.
Matings between two species that produce embryos that fail to develop are evidence of:
a. hybrid sterility b. hybrid breakdown. c. hybrid inviability. d. ecological barriers e. prezygotic isolation.
The cells organelles that are surrounded by DOUBLE MEMBRANES and contain their OWN DNA are the ___________________.
a) nucleus, ER, and lysosomes b) nucleus, vacuoles, and chloroplasts c) nucleus, chloroplasts, and mitochondria d) ER, Golgi bodies, and vacuoles