What relationships exist among reasoning, evidence, and explanation?
A. Evidence is used to connect the explanation and the reasoning.
B. Reasoning is used to connect the evidence and the explanation.
C. Reasoning is associated directly with explanation, but not evidence.
D. Evidence is associated directly with explanation, but not reasoning.
B. Reasoning is used to connect the evidence and the explanation.
If members of a population have a variety of traits, it is..
A. less likely that most of the members will have traits that let them survive and reproduce.
B. less likely that some of the members will have traits that let them survive and reproduce.
C. more likely that some of the members will have traits that let them survive and reproduce.
D. more likely that most of the members will have traits that let them survive and reproduce.
C. more likely that some of the members will have traits that let them survive and reproduce.
Living things with traits that are a good fit to their environment
A. are less common in many ecosystems.
B. are more likely to survive and reproduce.
C. are less likely to survive and reproduce.
D. are more common in many ecosystems.
B. are more likely to survive and reproduce.
Consider the following scenario:
A scientist is analyzing one bird population. There is a large amount of variation in size in the population. There are also predators that eat these birds. After collecting evidence on three types of birds (small, medium, and large), the scientist discovers that the large birds are less likely to be killed. The only major genetic difference is the size of the birds. The colors and behaviors of the large birds are the same as those of the small and medium birds.
Using reasoning skills, which is the most credible explanation for what is contributing to this higher rate of survival?
A. The large birds may be the hardest for predators to attack.
B. The large birds may be the largest group in the population.
C. The large birds may be the hardest for predators to see.
D. The large birds may be the smallest group in the population.
A. The large birds may be the hardest for predators to attack.
Researchers plotted a distribution curve for leg length in a population of birds, with length from short to long on the x-axis. The curve shifts to the right after a disturbance. Which statement is correct about natural selection in this population of birds?
A. Birds with short legs were selected for.
B. Birds with long legs were selected for.
C. Birds with medium-length legs were selected for.
D. Birds with long legs and birds with short legs were selected for.