A pH value of ____ has the highest concentration of hydrogen ions
a. 1
b. 3
c. 5
d. 7
e. 9
ANSWER: a
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A. oxaloacetate B. malate C. phosphoenolpyruvate (PEP) D. pyruvate
Excluding humans, which group of organisms is most likely to change the abiotic factors within an ecosystem?
A. producers B. detritivores C. herbivores D. None of these can change the abiotic factors within an ecosystem. E. All of these can change the abiotic factors within an ecosystem.
Why do we find fossils of the same species located on multiple continents?
a. These species are all birds and could fly between the continents. b. These species are all fish that washed up on shores around the world. c. These fossils are from species that lived when supercontinents existed. d. Fossils from any species are only found on one continent.
As mesodermal structures rearrange during early development, spaces that open up merge to form the ____
a. coelom b. colon c. notochord d. mouth e. anus