The Living World — BIOLOGY STD 11 Science — Question

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?

Write a brief account of reproduction in fungi.

Name the division in which true jaws are absent. Write any four differences between Pisces and Tetrapoda super class.

Classify the following: plants into Long-Day Plants (LDP), Short Day Plants (SDP) and Day Neutral Plants (DNP) Xanthium, Henbane (Hyoscyamus niger), Spinach, Rice, Strawberry, Bryophyllum, Sunflower, Tomato, Maize.

Which structures form gynoecium? How is placenta related to gynoecium? What are its types?

Describe at least three major functions of turgor pressure.

How is secondary growth accomplished in dicot roots? Explain with the help of schematic diagrams.

Explain the chemical events that take place to form a blood clot to seal the wound.

Analyse the events during every stage of cell cycle and notice how the following two parameters change. Number of chromosomes (N) per cell.

Write the scientific names of following organisms?

1. Cat.
2. Rose.
3. Sparrow.