Plant Kingdom — BIOLOGY STD 11 Science — Question

Comment on the statement “living state is a non-equilibrium steadystate to be able to perform work”.

Compare the following: Resting potential and action potential

Sumit, student of class XI when returned from school was told by his mother that his grandfather was complaining about some uneasiness. Sumit told his mother to take him to the doctor. The doctor tied a cuff around his arm and pumped air, then he slowly released the air. The handcuff was connected to a tube containing mercury. Doctor told Sumit that his grandfather is suffering from high blood pressure and put him on medication. The doctor also advised him to take precautions and rest and asked Sumit's mother to bring him for regular checkups.

1. What is meant by blood pressure?
2. What is the harmful effect of blood pressure on health?
3. Enumerate the range of normal and high blood pressure in human.
4. What values are displayed by Sumit as a good grandson?

Differentiate between obligate categories and intermediate categories. Demonstrate with the help of a flowchart.

Is Pinus an evergreen tree? Comment.

Highlight the criteria considered for five-kingdom system of classification.

Describe the structure and function of a renal corpuscle.

Hairs in the inner lining of the nasal cavity prevent dust from getting inside the lungs. This is similar to which of the following? Why should we avoid breathing through mouth?

1. Air filters in automobiles prevent dust from getting into the carburetor
2. A sieve is used to filter out impurities from a substance

Make a comparative account of the five kingdoms ole (in Whittaker's classification) on the following characters:

1. Cell wall
2. Body organisation.

What is the difference between direct and indirect development?