Answer:
One reason, it causes global warming
Explanation:
It is a major source of carbon dioxide when it burns.Furthermore, the ash coal produces makes it impossible to get things clean.
Answer:
The image on the left is unicellular. Unicellular means to be made of one cell and the two on the right are multicellular, made of multiple cells.
Science experiments can be like “measuring how heart rate is effected by music “
Answer:
I) Sexual reproduction
II) Mutation
Explanation:
Variations refer to the difference observed within organisms of the same species. Variation are introduced into a population by:
- new genetic combinations that occur during sexual reproduction (i.e during meiosis)
- mutations, spontaneous changes that occur in genes and chromosomes.
