Some scientists theorize that early life was RNA-based
Indicate whether the statement is true or false
TRUE
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Which of the following statements about species, as defined by the biological species concept, is (are) correct? I. Biological species are defined by reproductive isolation. II. Biological species are the model used for grouping extinct forms of life. III. All members of a species can potentially interbreed.
A) I and II B) I and III C) II and III D) I, II, and III
Ecdysone, or chemicals that mimic ecdysone, are sometimes used as ____
a. insecticides b. fungicides c. herbicides d. fungicides and nematocides e. fertilizers
Beginning with growth of the pathogen at the top, place the events in order that can lead to a rapid exit of the pathogen.
a. inflammation results b. motility (irritability) of the bowel increases c. fluid stool provides rapid exit for pathogen d. increased peristalsis results in diarrhea e. intestinal pathogens grow in intestinal mucosa
Omnivores differ from carnivores in that omnivores derive their energy from
A) green plants. B) plants and animals. C) detritus. D) animals only. E) plants, animals, and photosynthesis.