Answer:
Focal length of the lens increases hence the size of the lens increases.
3)B
4) B
Explanation:
3)Focal length of the lens increases hence the size of the lens increases.
Pupil of the eye decreases in size so as to decrease the amount of sunlight entering the eye when the person looks at the sky. As the size of the pupil was increased for increase the intake of the light while reading a book in the shade
4) Im not really sure, but i am pretty sure it's B. Don't take my word ;D
Hope this helps,
Best of Luck
Answer:
Antigens
Explanation:
Antigens are the substances which are recognized and processed by many cells in the body and the presented to T cells which propagate immune response by activating B cells and macrophages
