What description explains how a flower produces a seed? (2 points) Group of answer choices

1.After the stamen produces pollen, the pollen is moved to the petal to produce a seed.

2.As pollen travels down the stamen, fertilization occurs and a seed is produced.

3.When the ovule receives pollen, fertilization occurs and a seed is produced.

4.When the stigma receives pollen, a seed is produced and then fertilization occurs.

Pretty sure its #3

Explanation:

Plants produce flowers to make seeds. To make a seed a flower must be pollinated. Pollen from the male part of one flower travels to the female part of another flower where the seeds are made. ... The petals act like an advertisement to attract various animals, which will carry the pollen from one flower to another.

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.

b tumor cells have a cell wall instead of a membrane

explanation:

tumor cells different from normal cells because tumor cells have a cell wall instead of a membrane.