A patient reports an inability to feel or recognize expressions of fear in others. Damage to which structure in the brain could be responsible for these symptoms?
a. cerebellum
b. brainstem
c. amygdala
d. hypothalamus
c. amygdala
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The amount of energy stored in plant tissue is an ecosystem's
a. gross primary productivity. b. net primary productivity. c. biomass ratio. d. greenhouse cofactor. e. production limit.
What is the importance of the pigment melanin in humans?
a. It prevents destruction of vitamin D caused by UV light. b. It allows formation of vitamin B caused by UV light. c. It prevents DNA damage by absorbing UV light. d. It prevents DNA damage by reflecting UV light.
________ cells provide support for plant organs where secondary growth has not yet occurred.
A. Sclerenchyma B. Meristem C. Parenchyma D. Collenchyma
In animals, mitochondrial DNA
a. has 13 protein coding genes. b. is inherited maternally. c. is very compact with almost no intergenic DNA. d. has genes for both tRNAs and rRNAs. e. All of the above.