12. A group of elements that has two electrons in its outer energy level is the

a. alkaline earth metals

c. alkali metals

b. halogens

d. actinides

What is the tendency of an object to resist a change in its motion? A. Velocity B. Inertia C. Gravity D. Momentum

If a climate changed a ecosystem, there would be a change in the kinds of and. that could live in that ecosystem

The concept of evolution by way of natural selection is a central tenet in biology that has been tested in numerous ways by many scientists but is not yet considered a law.

Scientists have never seen the ancient horses shown in figure 16-4 what do you think was the main type of evidence scientists used to prepare these diagrams

Which ecosystem is found where the fresh water of a river meets the salt water of the ocean?

In humans a gene that has been identifoef as causing a type of skin cancer is the

Which one of the "big 3" macronutrients is the most calorically dense at 9 calories per gram?

What happened at Chernobyl? (first to answer this will be marked as the brainliest)

2 cycles most closely related in their role in sustaining life

Which statement explains the difference between multiple alleles and polygenic inheritance? A. Multiple allele means more than one gene contributes to the phenotype and polygenic inheritance means more than two forms of the same gene in the