Biology - Study Mode
[#181] Our skin, when exposed to excess sunlight, becomes dark. This is because of our skin pigments called
Correct Answer
(B) melanin
Explanation
Solution: Within the skin's epidermal (outer) layer are cells that contain the pigment melanin. Suntanning occurs because exposure to sunlight causes the skin to produce more melanin and to darken. The tan fades as these cells move toward the surface and are sloughed off.
[#182] Ramapithecus and Cro-Magnon man are considered
Correct Answer
(A) ancestors of modern man
Explanation
Solution: Ramapithecus and Cro-Magnon man are considered ancestors of modern man.
[#183] Vitamin present in guava fruit is
Correct Answer
(C) Vitamin - C
Explanation
Solution: Guava has a rich source of vitamin C, A and E. Guava is called the super fruit because it is said to contain four times more vitamin C than orange and three times more proteins and four times more fibre than pineapple. It is also said to have more potassium than a banana.
[#184] Vitamins are
Correct Answer
(B) Micro nutrients
Explanation
Solution: Vitamins are micro nutrients.
[#185] Which of the following vitamins acts like hormone?
Correct Answer
(D) Vitamin D
Explanation
Solution: Vitamin D is a hormone the kidneys produce that controls blood calcium concentration and impacts the immune system. It is also known as calcitriol, ergocalciferol, calcidiol and cholecalciferol. Of those, calcidiol is the form doctors most commonly focus on when measuring vitamin D levels in the blood.