MODEL PAPER 1 — BIOLOGY STD 11 Science — Question

Give the location of hepatic caecae in a cockroach. What is their function?

Write any four differences between phycomycetes and ascomycetes.

Raju has recently joined the gym. The very first day, while doing exercise, he felt increased rate of respiration, heartbeat, sweating, etc. He got worried as he experienced the sudden changes in his body. He discussed it with his brother who is a biology student. His brother smiled and explained him that these are the normal activities of the organs/ organ systems that occur during exercise for the maintenance of normal physiology of the human body.

1. Name the processes that are necessary for maintaining normal physiology of the human body.
2. Define coordination and integration.
3. Explain the functions of various organs of the by body that are coordinated and integrated during exercise.
4. What values did Raju's brother possess?

Photosynthesis not only facilitates production of food but also cleans up the environment. Which of the following is similar to this multipronged effect of photosynthesis? Explain how deforestation affects our environment.

1. An automobile not only carries people but also releases carbon dioxide in the air.
2. A cow not only gives milk but also produces methane which is a greenhouse gas.
3. A cow not only gives milk but also produces cowdung which can be used as kitchen fuel.

Describe the structure of contractile proteins.

Enlist the demerits of an artificial system of classification of plants.

Draw the following structures of Pisum sativum:

1. Diadelphous androecium.
2. Carpel.
3. TS of ovary.

Name the two groups of nephrons on the basis of their position in the kidney. How are they different from each other?