Hummingbirds are small birds that require a regular food supply
When hummingbirds are faced with a situation that decreases their food supply, such as a storm, which of the following adaptations would be most useful for the bird to survive such an unpredictable and short-term absence of food resources? A) shivering
B) torpor
C) hibernation
D) burrowing into soil
B
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All of the following statements about a blastocyst are true EXCEPT
a. develops about 5 days after fertilization. b. still surrounded by the zona pellucida. c. comprised of blastomeres reorganized around the blastocyst cavity. d. still about the size of the original zygote. e. organized as embryoblast and trophoblast.
Rheumatic fever is caused by a(n) ________ infection.
A. primary viral B. opportunistic streptococcal C. primary streptococcal D. endogenous
Regardless of the source of energy, virtually all living organisms convert their energy into ________ before using it
a. light and heat b. carbon dioxide c. glucose d. ATP
Watson and Crick proposed that genetic information is encoded in the ____________________ of
____________________ in DNA. Fill in the blank(s) with the appropriate word(s).