I think it’s C, cooling and hardening, but I might be wrong. If it’s wrong then I’m sorry.
Two chromosomes in a pair – normally one inherited from the mother and one from the father. For example, the two copies of Chromosome 1 in a cell would be referred to as homologous chromosomes.
Answer:
True
Explanation:
Biomes such as the Amazon have so many different species we don't know all of them.
The Oxygen-Carbon Dioxide Cycle. Plants use carbon dioxide in a process known as photosynthesis. During photosynthesis, plants give off oxygen as a waste product. ... Animals breathe in the oxygen made by plants and breathe out carbon dioxide as a waste product.