What did Charles Darwin investigate while visiting the Galapagos Islands?
a. How the island species were completely different
b. How the island species resembled those from nearby islands
c. How the island species resembled those on other arid islands
d. How the island species resembled those from continental South America
e. How the islands were inhabited at all since they were 600 miles from South America
d
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Consulting Figure 7.1 if necessary, during which stage(s) of cellular respiration is(are) carbon dioxide released?
A. stage 1 only B. stages 1 and 2 C. stages 2 and 3 D. stage 3 only E. stages 3 and 4
Diving mammals like whales and seals experience frequent periods when they are not able to breathe air. Which of the following is a muscle adaptation they show to this challenge?
A. increased myoglobin concentrations B. increased capillary densities C. increased amounts of sarcoplasmic reticulum D. increased expression of acetylcholine receptors E. All of the choices for this question are correct.
Abscission can affect
a. leaves. b. fruits. c. flowers. d. all of these. e. none of these
The most complex group of unicellular protists is the ________
Fill in the blank(s) with correct word