Suzanna is often irritable, impatient, and punitive with alana and ben, her two preschool children. in response, alana is becoming difficult and poorly adjusted, whereas ben remains even-tempered and self-controlled. which of the following concepts explain alana and ben’s differing reactions?
a) gene-environment interaction
b) heritability
c) genomic imprinting
d) passive gene-environment correlation

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

both male and female gametes are produced by meiosis of the germ cells. therefore, both male and female gametes are haploid. one male and one female gamete unite during the fertilization to form the diploid zygote. in seed bearing plants, pollen grain is the male gametophyte, which produces sperm cells.