STD 11 - 4. Animal kingdom — NEET STD 11 Science — Question

Sweat contains

Assertion: Secondary immune response is quicker and stronger than the primary one.
Reason: Memory cells conversant with the recoming antigens are ready to combat the invaders.

Which of the following statement are true about Rana tigrina ?
(i) The most common species of frog found in India is Rana tigrina.
(ii) In peak summer frog take shelter in deep burrows to protect them from extreme heat, this is called as hibernation.
(iii) In peak winter frog take shelter in deep burrows to protect them from extreme cold, this is called an aestivation.
(iv) The frog never drinks water but absorb it through the skin.
(v) Male frogs can be distinguished by the presence of vocal sacs and a copulatory pad on the first digit of the hind limbs.

A man whose father was colour blind marries a woman who had a colour blind mother and normal father. What percentage of male children of this couple will be colour blind?

Assertion: Tendons and ligaments are examples dense regular tissue.
Reason: The collagen fibres are present in rows between many parallel bundles of fibres.

Out of the following, reptiles and birds differ in only one, which is it

For understanding the genotype of an offspring which cross should be performed