Select the correct answer from each drop-down menu. Why is nuclear power considered to be a clean source of energy?

Nuclear power is regarded as a clean source of energy because it doesn't produce
1. or 2.

1
A) greenhouse gases
B)Harmful waste products
C)enough energy

2
D)too much energy
E)helpful waste products
F)air pollutants

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

Give an example of a trait that is controlled by more than one gene.