PART - 2 - Unit V : CH - 18 Neural Control and Coordination — BIOLOGY STD 11 Science — Question

In which fields taxonomical aids are helpful? Why taxonomic aids are used in these studies? Which different taxonomical aids are used by the biologists?

Distinguish between Shark and Ray.

State the condition in which the flowers are described.

1. Perigynous.
2. Epigynous and.
3. Hypogynous.

Give one example of each plant in whih these flowers are found.

List the information that should be shown on the label of a herbarium sheet.

Fill in the blanks at (A), (B), (C) and (D) as shown in diagram. Name the chemical present in its (D) part which is also present in mitochondria.

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?

Study the following figure and label A, B, C and D pathway of anaerobic respiration in yeast.

Can there be mitosis without DNA replication in ‘S’ phase?

What is cardiac cycle? Write the difference between right ventricle and left ventricle.