Energy yields are high enough for Fe2+ oxidation that the bacteria that perform this reaction require only small quantities of Fe2+ to be available
Indicate whether the statement is true or false.
Answer: FALSE
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Photosynthesis and respiration both play a major role in the ____ carbon cycle, and can affect atmospheric CO2 levels on a seasonal or annual basis
Fill in the blank with the appropriate word.
Fairy shrimp are filter feeders that obtain organic particles from the water or scrape algae
from surfaces. Species that are found in deserts tend to have very drought-resistant eggs that can remain dormant for many months. They are an important food source for both birds and fishes. This description describes the organism’s __________.
a. niche b. life zone c. habitat d. population
What is the effect of stress on a population?
a. Plants compete less with each other in stressful environments. b. Plants compete more with each other in a stressful environments. c. Only abiotic factors contribute to environmental stress. d. Stressful environments brought about by humans do not affect populations. e. Stressful environments brought about by nature do not affect populations.
The sample size in this experiment is the number of flies in each treatment.
a. true b. false