Answer:
change through natural selection
Explanation:
A.
contracts to move substances through the body
D.
breaks down food to acquire nutrients
As animals move up in the food chain they start to have larger competition for food with other animals, deer compete with elk and even rodents that eat the same food as them. They must fight for food and survival.
Answer: C. is less likely to be eaten by a predator.
Explanation:
The adult seven-spotted cockroach is the prey of various other insects including beetles so mimicking the pattern of a beetle would send a message that it is a beetle and because the chemical irritant that the beetle has makes it get avoided by others, the cockroach gets avoided by other insects too who don't want to be sprayed.
Of course this does not always work but it works for the most part and ensures the cockroach's survival.
Blood enters the pulmonary vein with close to 100% of the blinding site for oxygen saturated.
