Question

what does genetic variation contribute to within a species?
a. uniformity in traits
b. increased susceptibility to diseases
c. decreased adaptability to environments
d. diversity among individuals

what is the primary mechanism by which species change over time according to evolutionary theory?
a. natural selection
b. artificial selection
c. environmental adaptation
d. genetic drift

what impact did climate fluctuations have on early humans?
a. decreased genetic diversity
b. promoted migration without adaptation
c. hindered technological advancements
d. forced adaptation to changing environments

Explanation:

• Genetic variation leads to differences in traits among individuals within a species, creating diversity.
• Natural selection is the main process by which species evolve over time as it favors traits that enhance survival and reproduction.
• Climate fluctuations forced early humans to adapt to changing environmental conditions to survive.

Answer:

1. d. Diversity among individuals
2. a. Natural selection
3. d. Forced adaptation to changing environments