Which of the following is true about the fetal stage of development?
A) The organ systems initially form, and then grow.
B) The head is disproportionately small at the beginning of the stage.
C) It comes after the embryonic period.
D) It consists of the first three months of the pregnancy.
C) It comes after the embryonic period.
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The type of DNA repair that corrects errors due to oxidative damage by replacing one to five nucleotides is
A) mismatch repair. B) base excision repair. C) roto-rooter repair. D) photoreactivation.
Which of the following is least likely to be found in an animal-pollinated plant?
a. scent b. nectar c. bright colors d. inconspicuous flowers e. nutritious pollen
Huntington disease
a. is inherited as an autosomal dominant condition. b. results in progressive deterioration of the nervous system. c. often does not show any symptoms until after the child-bearing years. d. is caused by an expansion mutation. e. is all of these.
What is the purpose of the waxy cuticle in plants?
a. It prevents desiccation. b. It prevents transpiration. c. It prevents diffusion of gases. d. It prevents the transport of nutrients. e. It prevents the internal transport of water.