How is environmental impact measured in a population?
A. number of individuals dying each generation plus birthrates
B. population size and resource production
C. population size and resource consumption
D. All of these are used to measure environmental impact.
E. None of these are used to measure environmental impact.
Answer: C
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In seed plants, meiosis produces ____ megaspores, however ____ leaving a single functional megaspore to produce a
____ gametophyte.
a. four; three disintegrate; male b. four; three disintegrate; female
c. eight; seven disintegrate; female d. two; one disintegrates; male e. two; one disintegrates; female
In humans, the condition of male pattern baldness is an example of a(n)
A. allele. B. genotype. C. gene. D. locus. E. phenotype.
On a field trip, a student in a marine biology class collects an organism that has differentiated organs, cell walls of cellulose, and chloroplasts with chlorophyll a. Based on this description, the organism could be a brown alga, a red alga, a green alga, a charophyte recently washed into the ocean from a freshwater or brackish water source, or a land plant washed into the ocean. The presence of which of the following features would definitively identify this organism as a land plant?
A) alternation of generations B) sporopollenin C) rosette cellulose-synthesizing complexes D) flagellated sperm E) embryos
Hydrophobic molecules tend to be ________ by water
A) absorbed B) mixed C) attracted D) repelled