Blood moving through veins can only flow in one direction because of the vein's

valves
pressure
contraction
restrictions

Round peas are dominant to wrinkled. what would you cross a round pea with to determine if it were heterozygous or homozygous dominant? why? ?

Which description provides the best objective summary of the article in the passage?

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation