What is the only known eusocial mammal?
A. humans
B. naked mole rats
C. Belding's ground squirrels
D. prairie dogs
E. honeybees
B. naked mole rats
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What causes tidal overmixing in estuaries?
a. strong tidal currents. b. strong river flow. c. an unstable water column. d. downwelling. e. animal migrations.
Which structure gives rise to microtubules?
a. intermediate filaments b. flagella c. collagen d. microfilaments e. centrioles
In Fredrick Griffith's classic experiments,
A. mice injected with strain R cells died of pneumonia. B. mice injected with strain S cells died of pneumonia. C. mice injected with live strain R cells and heat-killed strain S cells died of pneumonia. D. mice injected with strain S cells, or live strain R cells and heat-killed strain S cells died of pneumonia. E. mice injected with strain R cells, or live strain R cells and heat-killed strain S cells died of pneumonia.
________ describes the number of individuals at each trophic level multiplied by their dry weight
Fill in the blank(s) with correct word