What effect would constriction of the blood vessels have on the body?
a) decreased blood volume resulting in decrease heart rate
b) decreased blood pressure resulting in light headedness
c) increase blood pressure resulting in risk of heart of attack
d) increase blood volume resulting in decreased heart rate

Punctuated equilibrium verses gradualism have long been contested as ways in which species evolve. choose the best evidence for gradualism.

There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?

Need an answer asap 45 points and brainlest to the first person to answer why do scientific theories, such as biological and chemical evolution, represent the strongest explanation of the changes observed in the fossil record. must be in sentence form how can scientific theories on evolution and the fossil record change over time? must be in sentence form