Humans have 23 pairs of chromosomes, for a total of 46 chromosomes. In fact, each species of plants and animals has a set number of chromosomes. A fruit fly, for example, has four pairs of chromosomes, while a rice plant has 12 and a dog, 39. Top of page.
The germination time for grass seed ranges from 5 to 30 days depending on the variety. It can be even longer than this in cooler temperatures. This is how long it will take to actually see the grass growing. Until this point, the seed, or the soil and mulch in contact with the seed, must stay moist.
Replanting New Grass Seed. Grass is a fast growing plant, but the exact rate at which it grows depends upon the type of grass used and the growing conditions. Germination. Grass seeds usually germinate between seven and ten days after they have been sown, although it can take between three and thirty days.Growth. A fast growing variety of grass sown under good growing conditions will produce a green covering in about a week, although it will not yet be properly established.rass is a fast growing plant, but the exact rate at which it grows depends upon the type of grass used and the growing conditions. Germination. Grass seeds usually germinate between seven and ten days after they have been sown, although it can take between three and thirty days.