Answer:
a. Smaller class size is related to better academic performance.
Explanation:
A hypothesis is a testable prediction, a scientific guess of what you expect to happen from a study. There are directional and non directional hypothesis, the directional hypothesis states exactly what you expect such as " smaller class size is related to better academic performance while a non directional hypothesis predicts that there will be an effect but does not specify the direction, example is "smaller class size is related to academic performance".
The option chosen is an example of a directional hypothesis, option b, c, and d are more statements of facts and not hypothesis.
Answer:
Directional selection; stabilizing selection
Explanation:
- The stabilizing selection is a result of the decrease of the population and causes genetic variation due to the natural selection.
- The directional selection of the genetic variation shifts to a new phenotype and on exposure to the environmental changes and both of these can lead to the natural selection and contribute to the variation of the population.
Colder becuase of global warming
