Malaria is directly caused by
A. protozoa.
B. mosquitoes.
C. bacteria.
D. unclean environments.
A. protozoa.
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Flagellated protozoans possess a layer of
elastic proteins just beneath the plasma membrane called the
a. pellicle. b. cilium. c. capsule. d. pillus. e. flagellum
Which of the following is NOT an advantage of
asexual reproduction? a. Asexual reproduction is more efficient than sexual reproduction. b. Individual organisms do not have to seek mates. c. Asexual reproduction promotes variation. d. Asexual reproduction is less energetically costly than sexual reproduction. e. In stable environments the offspring are as well adapted as the parents.
Liquid portion of a solution that serves to dissolve a solute.
What will be an ideal response?
Normal diploid somatic (body) cells of the mosquito Culex pipiens contain six chromosomes. Assuming that all nuclear DNA is restricted to chromosomes and that the amount of nuclear DNA essentially doubles during the S phase of interphase, how much
nuclear DNA would be present in metaphase I of mitosis? Note: Assume that the G1 nucleus of a mosquito cell contains 3.0 × 10-12 grams of DNA. A) 3.0 × 10?12 g B) 6.0 × 10?12 g C) 12 × 10?12 g D) 0.75 × 10?12 g E) 1.5 × 10?12 g