Answer: Adaptations to environment are the means used by an organism to obtain food and energy in its particular habitat. Living things adapt themselves not only to their physical environment but also to their living environment, that is, they must adapt themselves to other plants and animals living around them.
Explanation:
In spermatogenesis,from a single spermatogonia 4 haploid sperms are produced after meiosis (100% efficiency).But in case of oogenesis,from a single oocyte only one is transformed into ovum even after meiotic division(25% efficiency)
The largest of the membrane-bound organelles, the nucleus first was described in 1710 by Antoni van Leeuwenhoek using a simple microscope. In 1831 the Scottish botanist Robert Brown characterized the organelle in detail, calling it the "nucleus," from the Latin word for "little nut." The nucleus is the site of gene expression and gene regulation.<span>
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B) population because there is more than one in one species and types