Question

how do plant grows and what makes plants grow​

Answer 1

Answer:

Plant Parts

Each part of a plant has a job that will help it grow. The roots grow down into the soil to hold the plant in the ground, and they also absorb water and food from the soil. ... The stem then carries this sugar from the leaves to the rest of the plant so fruits and flowers can grow and make new seeds.

Answer 2

AnSwEr

Most plants continue to grow throughout their lives. Like other multicellular organisms, plants grow through a combination of cell growth and cell division. Cell growth increases cell size, while cell division (mitosis) increases the number of cells. ... The key to continued growth and repair of plant cells is meristem.

In a natural ecosystem, nutrients are naturally cycled. Plants grow, using these substances, then they die. Microbes decompose them and new plants use the same nutrients to grow again. You know, the whole circle of life thing.

Agriculture gives us civilization exactly because it disrupts this balance. Humans use plants to mine nutrients out of the soil and then eat them. We can even measure the amount of nutrients that a crop can mine for us. For example, a hectare of maize in the US needs about 22 kilograms pounds of nitrogen per tonne of yield. We call this the plant’s mineral uptake. Problem is, the corn on the cob you’re eating is full of the nutrients that the next generation of plants would have used. We’ve taken nutrients out of the cycle, so we’ve got to replace them or the soil will be depleted.

That’s the point of a fertilizer. Since the beginning of agriculture, people have tried to stuff as much nitrogen, phosphorous, and potassium into the soil as they could. But nitrogen, above all, is, as a Cornell paper put it, "the essential element." While phosphorous is needed to make carbohydrates, nitrogen is a necessary component of proteins, which have long been known to be "the most important and most essential part of our food".

Manure has some nitrogen in it, which is why it was used on fields. Some plants — legumes — evolved the ability to support colonies of bacteria that pull nitrogen from the air and convert it from its inert N2 (dinitrogen) form into ammonia (NH3).That’s why people have tended to rotate crops throughout time, trying to balance the differing nutrient needs of a system of plants.

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