To critique scientific arguments and increase the validity of scientific evidence, scientists perform multiple tests of different data to support their hypothesis and claim.
Answer:
answer b is the correct of this question
Answer:
Aside from preventing back flow of blood, valves in the veins aid in the return of blood from the extremities to the heart ( from feet and legs in particular).
Explanation:
Answer:
The biological species concept requires a disruption of gene flow between species
Explanation:
The biological species concept defines a species as a group of organism that interbreed and produce offspring that are fertile and viable. The process of species formation is called speciation and it occurs when two groups of organisms become reproductively isolated. Organisms frown different species do not exchange genes, which means that gene flow between species is disrupted.
