The second one, I took the test already. And I got it right. But just negate it. Causijg more soil erosion.
Answer:
While humans, as well as other vertebrates, have a closed blood circulatory system (meaning that the blood never leaves the network of arteries, veins and capillaries), some invertebrate groups have an open circulatory system containing a heart but limited blood vessels.
Explanation:
The first one, Added removed or changed. Mutation as in anything that would cause the slightest change.
Explanation:
It responds to big changes including changes in output from the sun, plate tectonic movements, and random asteroid impacts from space.
