Marge Simpson decided to start a new garden in her backyard. She heard that plants compete for space and decided to testis idea. She bought a mixture of flower seeds and some potting soll She put the same amount of soil into each of 5 plastic cups. In the
first cup she planted 2 seeds, in the second cup she planted 4 seeds, in the third 8 seeds, and in the fourth cup ste planted 16
seeds. In the last cup she planted 32 seeds. After 25 days, she determined which set of plants looked the healthiest
What is the control group?

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.

producers: apple trees, potatoes, carrots, grains, acorns, cabbage, grass, corn, lettuce

consumers: deer, mice, rabbits, chickens, squirrels, horses, worms, cows

predators: eagles, frogs, wolves, owls

the answer is sex-linked recessive.

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