The sex life of the saguaro cactus begins
a. immediately after formation.
b. after 5–10 years.
c. after 35–50 years.
d. after 100 years
C
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Which system maintains the volume and composition of body fluids?
a. integumentary b. immune c. digestive d. urinary e. circulatory
Genotype can always be inferred from phenotype
__________________ Indicate whether the statement is true or false.
Which of the following statements is true?
A) Even in a seemingly clear-cut example of complete dominance, at the protein or enzyme level, one can detect about half the activity or gene product. B) In the threshold effect, one would expect the gain of function mutant to be recessive. C) With both incomplete dominance and codominance, one expects heterozygous and homozygous classes to be phenotypically identical. D) The threshold effect is only seen in incomplete dominance, not in codominance. E) An individual won't show incomplete dominance if one allele is a loss of function allele.
Which of the following is not true of viruses?
A. Viruses replicate by binary fission. B. Viruses consist of one or more molecules of DNA or RNA enclosed in a coat of protein and sometimes in other more complex layers. C. Viruses can exist in two phases: intracellular and extracellular. D. Viruses are acellular.