During a field trip to a rocky intertidal area during low tide, you notice an interesting cone-shaped shell. you reach down to pick it up but to your surprise find it is firmly attached to the substrate by a strong muscle that acts like a suction cup. what abiotic factor drives these adaptations?

"do a testcross with a homozygous recessive plant."

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.