Please help me make one I don't understand Select ten to twenty animals to construct a dichotomous key.
Develop a key for animals.
Make a list of ten to twenty animals of your area, or of one continent of the earth. If a wildlife reserve or a zoo is not easily accessible, pictures may be used to help you with this activity. From this list, construct a dichotomous key for animals.

the diploid number of chromosomes is sometimes represented by the symbol 2n. for the fruit fly, the diploid number is 8, which can be written as 2n = 8, where n represents twice the number of chromosomes in a sperm or egg cell.

not sure if this what   you'r looking for would be percent composition

the answer u all are looking for is 4000000000000000000000 million years.

plants absorb water from the soil by osmosis. root hair cells are adapted for this by having a large surface area to speed up osmosis. the absorbed water is transported through the roots to the rest of the plant where it is used for different purposes: it transports dissolved minerals around the plant.