Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction. For example, if a population is exposed to a new disease, selection will act on genes for resistance to the disease if they exist in the population.
The atrioventricular valves.
Answer:
B - invasive species
Explanation:
Invasive species are species that are not native to a particular habitat but are introduced into that habitat intentionally or by accident.
The Burmese python was released in Florida (where it is not a native species). Because it is not from Florida, it does not have any natural predators there, and it can seriously damage the ecosystems by preying on organisms that have no adaptations against the new predator.
