Two species of turtles belonging to the same genus occasionally cross paths in nature and attempt to mate. However the shape of their shells makes mating nearly impossible so fertilization rarely occurs. What mechanism is keeping these two turtle species separate?     Mechanical isolation   Behavioural isolation   Geographic isolation   Hybrid isolation   Temporal isolation

Over the years, you notice that a chipmunk that has been making narrow tunnels under trees in your backyard has acquired a narrower body shape with strong digging arms and legs. Which of the following describes how Lamarck would view this change in the chipmunk's body.   Question 17 options:   The chipmunk will undergo rapid speciation, followed by long periods of no speciation.   The chipmunk will only pass on genetic information to it's offspring, and the environment will shape how they develop.   The chipmunk will pass the acquired traits in it's body to it's offspring.   If this chipmunk is better adapted to it's environment, it will be more likely to reproduce and pass on it's genes.

Speciation Mating at different times of the year is a barrier to reproduction. postzygotic O prezygotic

You have 3 populations inhabiting the same landmass. Individuals from the first and second populations cannot mate with each other. Individuals from the first and third population cannot mate with each other either. Individuals from second and third populations can mate with each other but produce sterile offspring . How many species do the three populations together represent based on biological species concept?