Which of the following answers include all the others?
a. atoms
b. molecules
c. electrons
d. elements
e. protons
B
Biology & Microbiology
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The quick response of the immune system to a second infection is due to the _____, a feature of the immune system as demonstrated by the success of vaccines
a. activation of macrophage cells b. suppression of suppressor cells c. T and B memory cells d. high levels of antigen e. new cytotoxic T cell.
Biology & Microbiology
Males that tend to be taller than normal with an otherwise normal phenotype have which chromosomal makeup?
a. XX b. XO c. YY d. XXX e. YYY
Biology & Microbiology
A(n) (catalyst/enzyme) is any molecule that speeds up a chemical reaction
What will be an ideal response?
Biology & Microbiology
In humans, genes make up ______ of the DNA.
about 10% about 75% 85% less than 5% about 50%
Biology & Microbiology