In the mid-nineteenth century Charles Darwin and Alfred Russel Wallace observed many organisms. Based on these
observations, they arrived at an explanation, called ____, for how populations change through time.
a. creationism
b. natural evolution
c. natural selection
d. genetics
e. evolution
c
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The pitch of a sound is determined by its ________
a. frequency b. loudness c. intensity d. amplitude
In mammals, the master clock is located in the:a
pineal gland. b. suprachiasmatic nucleus. c. crepuscular gland. d. biological clock. e. pituitary gland
Because their host cells have dsDNA genomes, viruses with RNA genomes cannot rely on host cell enzymes for genome replication or mRNA synthesis.
Answer the following statement true (T) or false (F)
Please match the clinical stage of infection with its description.
Decline of symptoms and return to a state of health A) Prodromal stage B) Period of invasion C) Convalescent period D) Incubation period