Which of the following apply to the demography of human populations today? (Check all that apply.)
A. We are using distributed resources disproportionately-less than 20% of us use over 80% of the energy.
B. We have plenty of resources still untouched.
C. We use over half of all renewable fresh water sources.
D. We use almost half of the Earth's land.
E. Our ecological footprint is decreasing.
Answer: D
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Escherichia coli and Salmonella can live in our intestines in the presence or absence of oxygen. They are considered which of the following?
A. autotrophs B. facultative anaerobes C. obligate anaerobes D. aerobic E. phototrophs
Four features help define __________: a notochord,
a dorsal hollow nerve cord, a pharynx with gill slits, and a tail extending past the anus. Fill in the blank(s) with the appropriate word(s).
In a given situation, reduced or missing function in gene A results in a viable but noticeable phenotype. The same is true for gene B. However, when both gene A and gene B products are reduced or missing in the same organism, the result is lethality
What is this called?
Cytoplasmic extensions by which some protozoa move are
A. cilia. B. flagella. C. pseudopodia. D. All answers are correct. E. pili.