46 chromosomes, but 23 pairs.
Answer:
Mutations are random Mutations can be beneficial, neutral, or harmful for the organism, but mutations do not “try” to supply what the organism “needs.”
Explanation:
Rachel Carson played a key role in the birth of environmentalism in the 20th century.
She became increasingly aware of the harmful facts of insecticide DDT on the environment. This compelled her to write her most famous work Silent Spring and defending herself against attacks from commercial interests.
The book also played an influential part in persuading governments to ban or heavily restrict the use of DDT and similar chemicals that persist in the environment.
Answer:
World Health Organisation
Explanation:
"WHO" stands for World Health Organisation. It's an specialized agency of the U.N that is concerned with international public health.
Answer:
A. Oxygen
Explanation:
During cellular respiration the cell uses oxygen to break down sugar. When sugar breaks down it produces energy in which your body needs. Blood picks up oxygen and releses carbon dioxide into your lungs.
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