Answer:
A. Is a collection of organs that work together to perform a specifc job
Explanation:
An organ system is a collection of organs that work together to perform specifc job.
Answer:
D. No, because the first atmosphere contained very little oxygen.
Explanation:
Answer:
The guiding principle of radiation safety is “ALARA”. ALARA stands for “as low as reasonably achievable”.
This is true. The impact of human on trees has been completely
negative. This includes deforestation which causing negative effects on the environment.
A massive scale of Earth’s forest has been cleared through deforestation. This
results to the damage of the land quality.
DNA in Plants. DNA is the hereditary orgenetic material, present in all cells, that carries information for the structure and function of living things. In the plant kingdom, DNA, or deoxyribonucleic acid, is contained within the membrane-bound cellstructures of the nucleus, mitochondria, and chloroplasts.