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The Human Eye Cell Diversity - Organization, Tissues, Plants and Animals Body Fluids and Blood Cells Epidemiology Trauma Surgery Heart and Blood Vessels Pathogens - Bacteria and Viruses Type of Dementia Musculoskeletal Diseases Cell Theory and Cell Organelles Viruses and Prions Phlebotomy Reproduction Anatomy: Muscle Surgical tech-safety

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Inheritance › View

In dogs, the allele for black fur (B) is dominant over the allele for white fur (b). A breeder breeds a heterozygous dog with a recessive homozygous dog. If the female dog has a litter of 12 puppies, predict how many will have black fur.

A. 12

B. 3

C. 6

D. 4

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The Vascular System and Blood Flow › View

What is the role of the thoracic pump in the return of blood to the heart?

A. Creating a difference in pressure between the veins in the chest and abdominal cavities

B. Pushing or massaging blood back to the heart with each muscle contraction

C. Regulating blood clotting

D. Assisting in the distribution of blood to different organs

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