Neural Control and Coordination — BIOLOGY STD 11 Science — Question

In how many classes was the superclass Tetrapoda classified? Write name.

Differentiate between RBCs and WBCs.

Differentiate between ascending limb and descending limb of Henle's loop.

Explain the function of melanin.

Lalit, student of class XI always likes to have junk food. His mother insists him to have fibre rich fruits and vegetables, because they are good for health. Lalit always ignored his mother's advise. One day, while his biology teacher was teaching about the digestive system and mechanism of digestion. She also explained about the food one should eat (Le., balanced diet) Lalit remembered his mother's advice and asked his teacher about the importance of fibre rich food in one's diet.

1. According to you, what is the advantage of having fibrous material in our food?
2. Name the term used to describe fibrous materials which is indigestible in nature.
3. Name any four fibre rich fruits.
4. What values are reflected through Lalit's character?

When separated by a semi permeable membrane, water enters the sugar solution. What would you call the sugar solution? Osmotically active or inactive?

`Digestion of starch starts in the buccal cavity, but stops in the stomach'. Comment.

1. Name the two hormones synthesised by Thyroid gland.
2. Write the full form of the following:

1. FSH
2. LH

Ascaris lumbricoides infection occurs through:

1. Sole of uncovered feet.
2. Contaminated cooked measly pork.
3. Improperly cooked measly pork.
4. From air through inhalation.

How does a gap junction facilitate intercellular communication?