Answer:atmosphere
Explanation:Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly 78% nitrogen and 21% oxygen 0.97% argon and carbon dioxide 0.04% trace amounts of other gases, and water vapor. This mixture of gases is commonly known as air.
Answer:
The first three steps are related to the construction of Punnett squares and the fourth step is not part of the square construction since information related to the phenotype It can be established as a conclusion or result of the genotypes obtained.
Explanation:
Unlike gradualism, punctuated equilibrium involves stable periods of change interrupted by rapidly occurring change. The correct answer is B.
Answer: Pioneer Species
Explanation: Because they are part of a hardy species that whom are the first to move to a previously bio diverse steady ecosystem.
Give scientists clues about the kind of organisms that lived in an ancient environment...... FOSSILS