The source of energy for nearly all ecosystems is
A. the sun.
B. food.
C. oxygen.
D. water.
A. the sun.
Biology & Microbiology
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The ____ layer of the mammalian gut performs peristalsis
a. mucosa b. muscularis c. serosa d. submucosa e. submucosa and muscularis
Biology & Microbiology
A bacterial loop entails a portion of the food web in which bacteria convert dissolved organic matter into consumable bacterial biomass
Indicate whether the statement is true or false
Biology & Microbiology
Biodiversity refers to _____
a. genetic diversity b. species diversity c. ecosystem diversity d. all of these
Biology & Microbiology
Plants adapted to low-nutrient environments are characterized by
A) a high growth rate. B) decreased root production. C) increased leaf longevity. D) faster growth when more nitrogen is available.
Biology & Microbiology