What does it mean if there is a lot (vs. a little) amount of carbon dioxide?

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

In what for do plants utilize nitrogen? why do they need nitrogen?

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.