MODEL PAPER 10 — BIOLOGY STD 11 Science — Question

Below is a list of plant fibres. From which part of the plant these are obtained (i) coir (ii) hemp (iii) cotton (iv) jute?

How are the hypothalamic hormones transported to target organs?

Water vascular system is the characteristic of which group of the following:

1. Porifera
2. Ctenophora
3. Echinodermata
4. Chordata

How would it affect the digestion of fats and carbohydrates, if there is a blockage in the pancreatic duct? Explain.

Differentiate between apical and intercalary meristems on the basis of location and function.

What is non-cyclic photophosphorylation?

Dissemination of seeds is necessary for better growth of plants of the next generation, because it helps in getting access to necessary resources for growth. Which of the following is similar to this statement? How can we correlate this with our life?

1. We should go out and play outdoor games, instead of sticking to our computer screens.
2. One should travel a lot because traveling is a good way to learn about things around us.
3. One should get rid of home-sickness and leave his home-town to grab most of the opportunities available.

How is heart failure different from cardiac arrest?

Answer the following:

1. Name the stress hormone found in plants.
2. What causes 'bakane' disease of rice?
3. Why do lateral buds start developing into branches, when apical buds are removed?

Give the scientific terms for the following:

1. A protein found in milk that forms curd, it tends to be difficult for infants to digest.
2. A lymphatic vessel in an intestinal villi, it aids in the absorption of fats.
3. Sphere formed by bile salts that surround lipids to make them temporarily water soluble.
4. Fine microscopic, finger-like projections lining the small intestine that serves to increase, the absorptive surface area.