Some species of plants cannot interbreed by pollinating each other because the sexual structures of the one species ripen and mature at a different time from the other. This genetic isolating mechanism is
A. geographic.
B. seasonal isolation.
C. habitat preference.
D. behavioral.
B. seasonal isolation.
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The specific traits of a particular organism enabling it to survive, grow, and reproduce within a given environment are called
A) mutations. B) genes. C) adaptations. D) phenotypes.
Nutritional mutations can be described as ________
A) those mutations that change the composition of the medium B) those mutations that do not allow a bacterium or fungus to grow on minimal medium but do allow growth on complete medium C) all strains that are not auxotrophic D) those mutations belonging to the group called prototrophs E) those mutations caused by site-specific mutagenesis
All of the following statements are true regarding mitosis and meiosis II EXCEPT:
A. The earliest eukaryotes were almost always single-celled and haploid, and they produced by mitosis. B. Mitosis evolved later, from meiosis. C. By mitosis and cytoplasmic division, one cell becomes two new cells. D. The outcomes of mitosis and meiosis differ. E. The molecular machinery of mitosis became remodeled into meiosis.
Where might you find microbes like bacteria and fungi? (Choose all that apply)
> In soil > In many places within your body > On your skin > On the inside of a sterile agar plate that has not been inoculated > On a disinfected lab bench > In the air > In sterilized growth medium prior to inoculation > On the inside of a nutrient agar plate that has been left open for several minutes > On your phone