The Hawaiian bobtail squid forms a symbiotic relationship with the ________ bacterium Aliivibrio fischeri
a. pathogenic
b. nitrogen-fixing
c. antibiotic-producing
d. bioluminescent
Answer: D
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In the second phase of photosynthesis, chemical energy + __________ = sugar
a. carbon dioxide b. nitrogen c. oxygen d. water
Alligators more closely resemble lizards than birds; however, alligators and birds have four-chambered hearts, which
lizards do not have. In this example, the four-chambered heart is a ____, which indicates that alligators are ____ related to birds than to lizards.
a. derived character; more closelyb. key innovation; more closely c. derived character; more distantly d. key innovation; not e. homologous structure; more distantly
The organ of nutrition used in fetal development in the most successful mammals is the
A. mammary gland. B. placenta. C. egg. D. pouch. E. marsupium.
Positive feedback mechanisms enhance changes in the body
Indicate whether the statement is true or false