It is true that studies of animals show that they play only when the physical survival needs have been met; however, there is growing evidence that for children, play is crucial in terms of biological evolution as well as individual development.
Answer:
The answer is a codon. A codon is in a mRNA while an anti-codon is in a tRNA.
Answer B sounds reasonable
They transport the pathogens by biting, or a human eats an infected animal.
Answer:
Inside the air sacs, oxygen moves across paper-thin walls to tiny blood vessels called capillaries and into your blood. A protein called haemoglobin in the red blood cells then carries the oxygen around your body.
Explanation:
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