The correct answer is D. Two species of insects produce infertile offspring
Explanation:
In biology, the prezygotic barrier refers to mechanisms or barriers that avoid different species to reproduce or that occur before a zygote is formed, this includes differences in the geographical location or ecosystem species reproduce, the time in which they reproduce, reproduction rituals, among others. Additionally, prezygotic barriers differ from postzygotic because postzygotic barriers occur after the zygote has formed and this mainly includes offspring that has lower viability or that is infertile. Considering this, the one that is not an example fo a prezygotic barrier is "Two species of insects produce infertile offspring" because different to the rest of the examples, this occurs after the zygote forms and therefore is a postzygotic barrier and not prezygotic.
Asexual requires one parent, which produces genetically identical offspring, however sexual reproduction requires two parents, and there is a varied genes
if we will grow huge number of trees and other plants the oxygen level will increase because tree produce oxygen during the process of photosynthesis and if one gases level will increase then other will also decrease...
