Which of the following statements is false regarding why some scientists believe that the term "prokaryote" is a somewhat artificial designation?
A. Many bacteria have cytoskeletal elements
B. Some bacteria have internal membranous structures
C. Some bacteria have their genetic material enclosed within a membrane
D. Some bacteria have 80S ribosomes
Answer: D
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Which of the following is not involved in plant development?
A. active migration of cells B. cell division C. adhesion among cells D. adsorption of water and nutrients E. differentiation into distinct cell types
This term indicates that nearly all the individuals in the population have the same alleles.
A. genetic bottleneck B. frequency loss effect C. low genetic diversity D. genetic drift
The major cation responsible for regulating actin-myosin contraction is
a. Ca2+. b. H+. c. K+. d. Na+.
What can you conclude from the fact that DNA analysis of all chloroplasts reveals that they are monophyletic?
A. Endosymbiosis of the same species of cyanobacteria occurred multiple times in cells that evolved into red, green, and brown algae. B. All eukaryotic cells engulfed cyanobacteria at some point in their evolutionary history. C. Aerobic bacteria were engulfed by eukaryotic cells, forming plant cells. D. Cyanobacteria reproduced by sexual reproduction after being engulfed by brown algae.