Which of the following structures are accessory structures of the digestive system?
mouth and stomach
esophagus and rectum
pancreas and liver
pharynx and gall bladder

What would be the result if crossing over did not happen during meiosis in humans? a. there would be less genetic variation in humans. b. parents would be more likely to look like their children. c. the human population could not reproduce. d. children would have more chromosomes.

Preventive health behaviors rarely have much influence on health as most diseases are genetic. a. true b. false

When one dna molecule is copied to make two dna molecules, the new dna contains a) 25% of the parent dna. b) 50% of the parent dna. c) 75% of the parent dna. d) 100% of the parent dna. e) none of the parent dna.