Plant growth requires steady sources of water and
nutrients obtainable from __________ and soil. Fill in the blank(s) with the appropriate word(s).
Answer: carbon dioxide
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Substitution of one base pair for another in a coding region of a gene can result in a ____ mutation
where the changed codon codes for a different amino acid than was previously coded for.
a. missense b. chromosomal c. frameshift d. silent e. nonsense
The “sixth mass extinction” refers to
a. the end of the dinosaur era b. the rise of predators during the Cambrian period c. what will happen to the human species after a nuclear war d. the rapid loss of biodiversity due to degradation of the environment by humans e. what happened when insects evolved on land
The rocky area at the bottom of the photo would be considered which section of a soil profile?
A) unconsolidated material B) subsoil C) topsoil D) organic layer
Which organisms undergo alternation between haploid and diploid generations?
a. all plants b. all animals c. all bacteria d. all fungi