None of them.
I'm assuming that you left off an option. a prokaryotic cell is a single-celled organism, generally a bacteria. an example would be e-coli.
Answer:
B
Explanation:
Crossing over is the process involved during meiosis of two chromosomes sharing genetic information with each other from each parent. This happens so the two daughter cells or sister chromatids have a variety of genetic information and so they are not completely identical. This leads to genetic diversity or variation.
The Live oak trees can be defined as the sources of nutrients for the animals and plants.
Explanation:
Live oak trees are capable of producing acorns that turkeys, ducks, deer and other animals can feed on.
The acorn and flowers of oak rot and decay are the sources of nutrients for the soil and provides nutrients to other plants sharing the same soil for water and nutrients.
According to Darwin, evolution occurs because of natural selection.