Praxis Biology Content Knowledge (5235) Test Prep Questions and Answers

Which of the following characteristics of a material found on the bark of a tree will most likely prove that the material is a living thing? B.The material appears to reproduce on its own. Option (B) is correct. One of the characteristics of a living thing is that it can reproduce on its own. Given the DNA sequence 5' ATGCCCTCA 3', which of the following is the correct complementary sequence of messenger RNA? A.3' U A C G G G A G U 5' Option (A) is correct. A strand of messenger RNA has a base sequence complementary to that of the DNA template strand, and the strand orientations are antiparallel. The only difference between DNA-DNA and DNA-RNA pairing is that uracil in RNA replaces thymine in DNA. According to evolutionary theory, which of the following individuals has the greatest Darwinian fitness? C.A woman who lives to be 80 years old, has 6 children and 30 grandchildren, and is in poor health most of her life Option (C) is correct. Darwinian fitness is largely defined by the ability to survive, reproduce, and pass on one's genes. Despite the fact that the woman is in poor health most of her life, she has more children than any of the other individuals has. Because she also has 30 grandchildren, the woman has made a large contribution to the gene pool of two generations. When caribou migrate, the weaker ones often become the prey of wolves and other carnivores. If the vegetation that the caribou eat is sparse for several consecutive years, which of the following will most likely be true about the wolf population during that same period? A.The wolf population will initially increase because of an increase in the wolves' food availability. Option (A) is correct. In this example of interacting organisms in a community, the caribou population will weaken because of lack of food, making them easier prey for the wolves. With the increase in food, more wolves will survive and hence will produce more offspring. With time, if the caribou population does not rebound, the number of wolves will also decrease. Which TWO of the following are scientific theories? B.Evolutionary adaptations arise by natural selection.