The Cenozoic era, during which the diversity of animals living today arose, has extended from 65 mya to the present. This is approximately ___ of the geologic timescale.
A. 4%
B. 15%
C. 1.5%
D. None of the answer choices is correct.
E. 7%
C. 1.5%
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Up until 20-30 years ago, people with cystic fibrosis (CF) wouldn't live long enough to reproduce
CF is a homozygous recessive condition, leading researchers to think that over time the incidence of CF would decrease because the allele would be removed from the gene pool. The results actually indicate that the rate of CF is on the rise. Which of the following would explain those results? A. We are being subjected to more mutations as a population due to more pollution. B. The population is increasing, and more people mean more mutations. C. The heterozygous condition is being selected for, much like what we see with sickle cell trait. D. People are traveling more, so when members from different areas reproduce, more mutations will result.
Which of the following are functions of decomposer fungi? Check all that apply.
_____ breakdown of leaf litter _____ breakdown of wood _____ breakdown of dead animals _____ recycling of essential nutrients _____ breakdown of pathogenic bacteria
The study of evolutionary relationships is called:
a. taxonomy b. phylogeny c. genetics
Virions attach to a target host cell by means of (capsules/capsids/ligands)
What will be an ideal response?