Pleaseee help i’m struggling sm! :( thank you picture provided!

The last option

Explanation:

Since the ability to roll the tongue is a dominant trait, the percent chance that all children will be tongue rollers depends on the tongue rolling ability of the parents

If both parents are homozygous dominos for the trait, there is a 100% chance that their children will be tongue rollers.

If both are heterozygous for the trait, there is a 75% chance of production tongue rollers

answer; polycythemia is the correct answer;

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.