4. all of the above is the answer
Answer:
Light ray coming inside the human eye refracts four times,
the first refraction takes place in cornea, secondly it takes place in aqueous humor, followed by refraction in lens and then in vitreous humor.
Answer:
C. Classification of Organisms
Explanation:
<span>In the process of photosynthesis, carbon dioxide is taken from the atmosphere and oxygen is realased. But now with the evolution, the atmosphere has much more oxygen than carbon dioxide. So the first step of absorbing carbon dioxide itself has been challenged by the process of photosynthesis.</span>
Answer:
<u>Red blood cell in humans -</u> it has no nucleus. Hence it offers the cell to carry more haemoglobin.
- they are disc shaped allowing them to pass through narrow capillaries.
<u>Root hair cells in plants-</u> they have a large cytoplasm which enables them to take water from the soil.
<u>White Blood Cells in humans -</u> they have lobed nucleus and so can change their shape to pass through narrow capillaries.
- <em><u>HOPE IT HELPS...</u></em>