Why is self-reinfection commonly seen in children that suffer from pinworms?
What will be an ideal response?
After mating in the colon, the female pinworm migrates at night to the anus. Here, it deposits its eggs perianally. This causes the intense perianal itching that is characteristic of this infection. Scratching leaves eggs on the skin and under the fingernails; as a result, infected individuals may continuously reinfect themselves. This is especially common in small children because they do not tend to practice effective handwashing.
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Based on the three cell model of global air circulation shown in the figure above, where would you be most likely to find a plant species that is very drought tolerant, but not cold tolerant?
A. Between 20? and 30? latitude
B. Between 0? and 15? latitude
C. Between 45? and 55? latitude
D. Between 60? and 100? latitude
Oceanic surface currents are driven by winds
Indicate whether the statement is true or false
Phenotypic variation among individuals with the same genotype is known as genetic variance
a. True b. False
The original atmosphere of Earth is thought to have been rich in
a. CO2, N2, H2, H2S, and CO. b. CO2, N2, O2, Ar, and Ne. c. CO2, N2, O2, Rn, and Ne. d. CO2, N2, H2, Kr, and Xe.