Look it up on google , i had this same question and google helped me. i can’t remember the answer or i’d tell u
The mechanisms of reproductive isolation prevent the reproduction of two individuals from different species. The prezygotic mechanisms disrupt the stages of reproduction before the forming of the zygote or prevent the mating at the start, and the postzygotic mechanisms affect the stages of reproduction after the forming of the zygote.
So, the first and the third example (the urchins and the grasshoppers) show the prezygotic mechanism, as the two individuals are not able to mate or form a zygote.
The second and the fourth example ( zonkey and the death of a zygote) show the working of the postzygotic mechanisms, as the zygote is formed, but it seems to be inviable, and the zonkeys are sterile, preventing the individual to reproduce.
In place of clicking on the touchpad for the Cases, I would boost
in response to the visual incitements that would be linked with a reflex hammer
with an accelerometer; the reflex hammer would move appropriately to the carrying
of the picture on the screen by a programmed mechanical device. I wouldn’t use
the reflex hammer’s sound however; it’s purely there to compute my reaction
times (time of highest acceleration of movement of the reflex hammer deducted
by time of reflex) instead of using the computer’s software at figuring
reaction times, since I think the software is defective.
A homologous<span> structure is an organ, system, or body part that shares a common ancestry in multiple organisms. So the Structure is said to be C) Homologous. Hope this Helps</span>
