The zygote implants in the uterus
<span>In aquatic ecosystems net primary productivity is related to</span>available sunlight and nutrients.
Answer:
c. It dealt with the subject of human evolution.
Explanation:
- The origin of the species tells about the evolution of the species through the natural selection and the descent of man is the evolution of man as a single specie which <u>began on the African continent.</u>
- And this theory focused on the sexual selection and process of the human evolution that are closely connected and he found that the selection of males is different from those of the females.