The study of the distribution of animals and plants around the world is ____
a. diversity
b. biogeography
c. ecology
d. natural history
e. environmentalism
ANSWER: b
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Explain how the incubation period can influence the spread of an infectious agent
A. An infectious carrier will only spread the illness when they are showing acute symptoms. As such, the length of incubation period is not important for spreading the illness. B. Depending on the microbe and the illness, an asymptomatic carrier in the incubation period might be shedding infectious microbes to his/her surroundings. In such a case, a longer incubation period would lead to a greater spread of the disease as the carrier comes into contact with more individuals while he/she is generally appearing to be healthy. C. A very short incubation period will place a patient into the highly infectious active disease state sooner. Since people avoid contact with actively ill individuals, a very short incubation period will always lead to a DECREASE in the spread of an infectious disease. D. A very long incubation period will place a patient into the highly infectious active disease state later. Since people generally avoid contact with actively ill individuals, a very long incubation period will always lead to a DECREASE in the spread of an infectious disease.
In a population of 2400 long horn sheep, 400 males and 750 females breed each season. What percentage of the actual population is the effective population size?
A. ~48% B. ~43% C. ~27% D. ~65% E. ~17%
After DNA repair enzymes cut out part of a DNA strand that had an incorrect nucleotide, ____ is/are
needed to complete the repair.
a. primase, DNA polymerase, and DNA ligase b. DNA polymerase c. DNA polymerase and DNA ligase d. primase and DNA ligase e. primase and DNA polymerase
These are the cheekbones of the face.
What will be an ideal response?