Morphology of Flowering Plants — BIOLOGY STD 11 Science — Question

Mention the four important events/ processes associated with the photochemical phase or light reaction of photosynthesis.

Why are neurons called excitable cells? Mention special features of the membrane of the neuron?

Answer briefly:
How do you perceive the colour of an object?

How do metal ions influence the action of enzymes? Give an example.

Gibberellins were first discovered in Japan when rice plants were suffering from bakane (the foolish seedling disease) caused by a fungus Gibberella fujikuroi.

1. Give two functions of this phytohormone.
2. Which property of Gibberellin caused foolish seedling disease in rice?

What names were given to the PGRs that were discovered as inhibitors independently by three scientists? What are they all referred to as now?

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

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

What is interstitial fluid? Mention its importance in the body.

Name two gonadotropins secreted by the anterior pituitary. Why are they called so?

Excretion is an important process as it helps in getting rid of waste from the body. Which of these is similar to this fact? What is the importance of maintaining cleanliness at public places?

1. Cleaning our home is necessary to create a healthy place for living.
2. Garbage should be thrown out every day.
3. Garbage dumping sites should be far away from the city limits.