What is the function of the sepal of a flowering plant?
a. To absorb sunlight for photosynthesis
b. To protect the flower bud
c. To attract pollinators
d. To absorb nutrients
e. To bear ovules
b
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During normal human embryonic development, if ____, then the SRY gene switches development toward ____
a. a Y chromosome is present; maleness b. an X chromosome is present; femaleness c. two X chromosomes are present; femaleness d. the X chromosome is absent; maleness e. a Y chromosome is present; femaleness
Eukaryotes have more ways to obtain energy than prokaryotes
A. true B. false
The number and variety of species within a community is its:
1.Biodiversity 2.Ecosystem biodiversity 3.Genetic variation 4.Species richness
M. pneumoniae is detected as the most common agent of lower respiratory tract infection among:
a. previously healthy patients 2 months to 5 years of age. b. adults younger than 30 years of age. c. community-acquired pneumonia in adults. d. school-age children.