Which of the following is a major influence on the direction of evolution (which organisms go extinct and which new ones evolve)?
A. the environmental conditions a species encounters
B. the size of the Earth
C. mutations in the cells that do not form gametes
D. floods, tornados, earthquakes, and hurricanes
A. the environmental conditions a species encounters
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______ do NOT depend on the circulatory system to deliver oxygen to the tissues.
A. Insects B. Molluscs C. Mammals D. Birds E. Amphibians
All microbicidal agents are sterilants.
Answer the following statement true (T) or false (F)
Which pathway is the foundation for the majority of ecosystems and food chains on Earth?
A) photosynthesis B) anaerobic respiration C) aerobic respiration D) chemosynthesis E) decomposition
Which of the following can best be considered a biological system?
a. a pond b. the biosphere c. a single liver cell d. all of the listed responses are correct