Which evolved during the paleozoic era? a. saber-toothed cats b. the first humans c. bacteria that could produce oxygen d. earth’s first land plants

4. how does a phospholipid behave in water? the phosphate head does not mix with water; the fatty acid tails do. the phosphate head and the fatty acid tails mix with water. the phosphate head and the fatty acid tails do not mix with water. the phosphate head mixes with water; the fatty acid tails do not.

Which level of consumer had access to the smallest apply of energy

The response is the basis for vaccination. primary secondary tertiary none of the above