Answer:
In all organisms, the instructions for specifying the characteristics of the organism are carried in DNA, a large polymer formed from subunits of four kinds (A, G, C, and T). ...
Most of the cells in a human contain two copies of each of 22 different chromosomes. ...
Changes in DNA (mutations) occur spontaneously at low rates.
If you cut a flatworm in half, both halves can grow into a new individual by fission.
The leaves grow when the plant is growing.and the leaves are attached because it's part of the plant
The main functions of a petal is to attract an insect with its pretty colors and give the insect a landing pad to collect to pollen
The surface area is used to get substances in or out through the cell's membrane.
