Answer: I can only list one (sorry): saber-toothed cats.
Explanation: . . .
Answer:
a. two plant species flowering at different times.
Explanation:
<em>The only option that is not a post-zygotic reproductive isolation mechanism would be option a, when two plant species flower at different times.</em>
Post-zygotic reproductive isolation mechanisms are those mechanisms that act to ensure that the product of fertilization remains invalid. This is as opposed to pre-zygotic isolation mechanisms that act to prevent fertilization and hence, formation of zygotes.
In option b, c, d and e; the zygote has been formed already and all the forces are just acting to ensure that it remains invalid. whereas in option a, there is no fertilization yet.
<u>Two plant species flowering at different times will ensure that there is no cross pollination between the two species. Without pollination, there cannot be a zygote formation.</u>
Hence, the correct option is a.
Answer:
This is the basic idea behind his theory of Natural selection
Explanation:
The theory of Natural selection was demonstrate in Darwin's book known as 'Origin of species' which was written in 1859
In this book, the process of change of an organism over time is described and also mentioned about their physical as well as behavioral changes.
Natural selection means the survival and reproduction of individuals by changing the phenotypes.
Natural selection is a process by which the nature accepts those organisms that can change their phenotype in order to survive with changing environment and eliminate those phenotypes that are not favorable for their survival.
Mullerian mimicry. Unpalatable means not tasty. If an animal (fly) is copying a toxic or unpalatable animal, it must be for survival. If predators know that one animal is unpalatable, the predator would not eat a fly that looks similar to that unpalatable animal.
