The key driving force in natural selection as first proposed by Charles Darwin is that _____.
A) mutations are common
B) all forms of life reproduce
C) resources are limited and organisms compete with each other for access
D) it's always better to be bigger and stronger than others in the population
E) living things are formed from cells
Answer: C) resources are limited and organisms compete with each other for access
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Define Mendel's law of independent assortment.
A. There are two versions of each trait, a dominant and a recessive; the one you get is random. B. The inheritance of one character has no effect on the inheritance of another character. C. Segregation of homologous chromosomes is random. D. The expression of one gene has no effect on the expression of another gene.
Which age structure diagram would be most indicative of the African country of Kenya?
a. pyramid-shaped with a wide base b. bullet-shaped c. middle section wider than both the relatively narrow base and top d. tapering from a broad top to a narrow bottom e. base and top both wider than the constricted center
Which structure is part of the brain stem?
A. thyroid B. hypothalamus C. adrenal cortex D. Medulla Oblongata
Which of the following is true about purging behavior related to bulimia?
Select one: a. There are no medical risks to purging. b. After many months of purging, it gets harder and harder to do. c. After vomiting, many kilocalories from the food eaten are still absorbed. d. Few kilocalories are absorbed when laxatives are used as a purging technique.