Chemical elements are important to living organisms because they make up the organic molecules that are found in all living things
The answer is lithosphere.
Answer:
The rift valley formed when the crust pulled apart.
Explanation:
The statement that best describes how the Great Rift Valley in Africa formed is that they formed when the crust pulled apart.
- This is geologically known as divergence.
- The Arabian plate and the Nubian/Somali plate are divergent plates.
- They are currently moving apart and away from each other.
- This creates a crack on the earth which is what formed the rift valley in Africa.
- Along such margins, earthquake activities are prominent.
<span>One of the advantages of genetic engineering is the ability to add vitamins and minerals supplements to food. The correct option is D. The other options given are disadvantages of genetic engineering. Apart from the advantages given here, genetic engineering has other merits, such as production of better agricultural products, increasing shelf life of products, elimination of diseases, etc.</span>
Tumor suppressor genes and proto-oncogenes cause cancer cells to divide uncontrollably.
The answer is B) proto-oncogenes.
