Gases move freely across the walls of the bronchioles into the capillaries that surround them
____________________ Indicate whether the statement is true or false.
F, alveoli
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Two principal organelles in eukaryotes that were apparently derived from different types of bacteria are the
A. microfilaments and microtubules. B. mitochondria and chloroplasts. C. rough ER and smooth ER. D. plasma membrane and nuclear membrane.
If a hypothesis stands after years of repeated testing, is consistent with all data gathered, and helps make successful predictions about other phenomena, it is considered to be a ____
a. speculative idea b. proven theory c. proven hypothesis d. law of nature e. scientific theory
During the Krebs cycle, ____
a. substrate-level phosphorylation occurs b. oxaloacetate is consumed c. electrons and H+ are removed from the coenzymes NADH and FADH d. molecules of carbon dioxide are consumed e. oxidative phosphorylation occurs
Swallow bugs cause nest failures and juvenile mortality. As colony size increases, the costs to cliff swallows are
a. increased juvenile mortality. b. decreased juvenile mortality. c. decrease in the number of unhatched eggs. d. a change in daily survival probability.