2) We wish to test if a certain vaccine developed for a disease is effective or not. What is the best way to do this?
A. Vaccinate 100 animals and expose all 100 to the disease.
B. Vaccinate 100 animals and expose 50 of them to the disease.
c. Vaccinate 50 animals, do not vaccinate 50 other animals, and expose all 1
to the disease.

Apreschooler with partial-thickness burns on 21% of the total body surface area progresses from the emergency phase to the acute phase of burn care. what is the most important nursing intervention at this time?

Two male mice, which we will call male a and male b, are both phenotypically normal. male a was from a litter that contained half phenotypically normal mice and half dwarf mice. the mother of male a was known to be homozygous for the normal igf2 allele. male b was from a litter of eight mice that were all phenotypically normal. the parents of male b were a phenotypically normal male and a dwarf female. male a and male b were put into a cage with two female mice that we will call female a and female b. female a is a dwarf and female b is phenotypically normal. the parents of these two females were unknown, although it was known that they were from the same litter. the mice were allowed to mate with each other, and the following data were obtained: female a gave birth to three dwarf babies and four normal babies. female b gave birth to four normal babies and two dwarf babies. which male(s)mated with female a and female b? male a with both females male a with female b, and male b with female a male a with female a, and male b with female b could not be determined male b with both females

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy