In the formula for calcium nitrate below, how many atoms of nitrogen are represented? 2 HNO3 + Ca(OH)2 ---> Ca(NO3)2 + 2 H2O

Select one:
a. 1
b. 2
c. 3
d. 6

Imagine that you have produced several versions of lactase, each of which differs from normal lactase by a single amino acid. describe a test that could indirectly determine which of the versions significantly alters the three-dimensional shape of the lactase protein.

In pea plants, the allele for tallness (t) is dominant to the allele for shortness (t). in the cross between a tall pea plant and a short pea plant shown below, what is the probability that the resulting offspring will be tall? whats the percent

Write the empirical chemical formula of calcium with a mass percent of 38.8, phosphorus with a mass percent of 20.0, and oxygen with a mass percent of 41.3.