Which centre of the central nervous system is primarily responsible for regulation of respiration?

The human cranium is made of_________________ bones.

How correlated characters help in defining genus?

In which plant coralloid roots are present?

Write the floral formula of an actionmporphic, bisexual,hypogynous flower with five united sepals, five free petals, five free stamens and two united carpels with suoerior ovary and axile placentation.

What is the role of pectoral girdle?

Identify the neurohormone that has its functioning in inhibiting the secretion of growth hormone from anterior lobe of pituitary.

There are many endocrine glands in human body. Name the gland, which is absent in male and the one absent in female.

Which organisms can sense and respond to their environment? How do humans sense their environment?

The number and kinds of organisms are not constant. How do you explain this statement ?

List out some freshwater and some marine bony fishes

What do you understand by guttation?

What is the importance of excretion?

What is the role of skull in human?

Do you consider a person in coma, living or dead?

Prepare a list of some animals that are found parasitic on human beings.

Give a comparison of different transport mechanisms used by plants.

What is osteoporosis? Why are women at a greater risk of suffering from osteoporosis? Suggest some precautionary means to avoid osteoporosis.

What is the need of a classification system in biology? How did different classification systems develop over a period of time?

During a painting class, the teacher asked students to draw a sketch and paint it by using only green colour. Ravi could not find green colour in his colour box and was scolded by the teacher who could easily see the green colour in the box. Suddenly teacher realised that Ravi was not able to differentiate colours. After school was over, teacher reported this matter to Ravi's parents.
(i) Did Ravi lack knowledge of colours?
(ii) How do you perceive the colour of an object?
(iii) Discuss the function of cones.
(iv) What values did teacher possess?

Some of the properties of tissues are not the properties of constituents of its cells. Give three examples to support the statement.

What is the importance of taxonomical aids? Describe various taxonomical aids.

Differentiate between polyp and medusa

What is the concept of metabolism? What are the metabolic basis for living?

Explain different types of blood groups and donor compatibility making a table.

Explain how the function of kidney is regulated in the body.

Calcium plays a very important role in the formation of bones. Write about the role of endocrine glands and hormones responsible for maintaining calcium homoeostasis.