Answer:
number of lenses used to magnify specimen. 1 vs 2 lenses in general.
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Answer:</u></h3>
<u>(a) Reason for the heart beating fast:</u>
- When we exercise/run the muscles work hard and need more oxygen.
- So, when Ravi's heart beats faster more blood can be pumped to the muscles thus giving the oxygen required.
<u>(b) Organs involved along with the heart to help Ravi complete his race:</u>
- The main organs involved along with the heart are quadriceps, hip flexors, hamstring, glutes and calf muscles.
- The nervous system, muscular system, skeletal system, respiratory system and circulatory system function effectively when a person runs.
The correct answer is the first one: The sun's energy is transferred through the vacuum of space to Earth. Radiation, the reason we wear sunscreen, is how we get light and warmth from the sun.
Answer : Corpus Callosum
Explanation : By the end of the preschool period, the brain structure called the <u>Corpus Callosum </u> becomes considerably thicker, with individual fibers that helps to co-ordinate brain functioning between the two hemispheres.
Corpus Callosum by definition is a thick band of nerve fibers that divides the cerebral cortex lobes into left and right hemispheres in the brain, which connects the left and right sides of the brain allowing for communication between both hemispheres.
