What does nitrogen fixation accomplish?
O
A. It allows bacteria to use nitrogen to grow.
O
B. It allows respiration to occur.
O
C CU
C. It allows plants to use nitrogen to grow.
O
D. It allows industry to mass-produce nitrogen.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?

Guinea pig coat color is determined by a single gene. the allele for black coat color is dominant to brown. in a cross between twoblack-haired guinea pigs, 20 offspring are born. if both parents were heterozygous, probability would predict that approximately howmany of the 20 offspring would have brown hair?