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What is the purpose of hair inside the nose?

Acromegaly is caused by:

The part of an embryo which gives rise to root is called …………………… and the part which gives rise to shoot is called ………………………..

Vegetative propagation refers to the formation of new plants from the following existing organs of the old plants
(a) stems, roots and flowers
(b) stems, roots and leaves
(c) stems, flowers and fruits
(d) stems, leaves and flowers

Which of the following are completely absent in plants:

The regulation of temperature by the skin is controlled by

Differentiate between :

(a) semen and sperm

(b) implantation and pregnancy

(c) follicle and corpus luteum

(d) ammion and allantois

(e) impotency and sterility

(f) prostate gland and Cowper's gland (the nature of secretion)

(g) identical twins and fraternal twins

Name the stimulus which causes the following movements in plants :

phototropism, thigmotropism, hydrotropism and geotropism.

Where in the lungs does gas exchange take place ?

Which of the statements given below is incorrect?

The Refractory Period, is the period soon after an action potential during which the neuron resists the production of another action potential.

During refractory period

X, Y, and Z are three animals. The animal X can fly but animal Y can only run on ground or walls. The forelimbs of animals X and Y have the same basic design but they are used for different purposes such as flying and running respectively. The animal Z became extinct a long time ago. The study of fossils of Z tells us that it had some features like those of X and some like those of Y. In fact, Z is said to form a connecting link in the evolutionary chain of X and Y.
(a) What could the animals X, Y and Z be?
(b) What name is given to the forelimbs like those of X and Y which have the same basic design but different functions?
(c) Name one feature in which Z resembled X.
(d) Name one feature in which Z resembled Y.
(e) Which is the correct evolutionary chain involving X, Y and Z : X $\to$ Z $\to$ Y or Y $\to$ Z $\to$ X?

Urea is formed in

The stimulus in the process of thigmotropism is :

(a) touch

(b) gravity

(c) light

(d) chemical

Which among the following is not a type of bacteria based on the shape?

i) What is the difference between fission in amoeba and fission in plasmodium?

ii) What are the advantages of reproduction by spores?

iii) Give two advantages of growing plants by vegetative propagation.

The arrangement of white and gray matter in spinal cord is completely reverse to that of ___

The technology that controls traits of organisms by modifying their genetic material is known as ______.

Which among the following statements is/are correct with respect to the law of dominance?

When the parasympathetic nervous system is stimulated:

Give a flow chart for classification of plant tissues. [5 MARKS]

The Neel-Kranti Mission was launched in the year

_______________ is the male reproductive organ in lower plants .

During which phase do the sister chromatids line up at the equator?

The ___________ receives, processes, interprets and stores information coming from senses. The __________ handles its input and output.

Which of the following hormone inhibits the growth of lateral buds and promotes the growth of terminal buds?

Define evolution how does it occur describe how fossils provide us evidences in support of evolution

Evaporation reduces temperature of __ surface.

What is the potassium pump theory? Explain in easy language.

(a) Name the three types of nerves which constitute the peripheral nervous system.

(b) What is the difference between a reflex action and walking?

(c) How do we detect the smell of an incense stick (agarbatti)?

In Spirogyra, asexual reproduction takes place by __.

A spherical mass of cells resulting from the repeated divisions of the zygote is called the _____

Plants absorb minerals by:

In which type of respiration, aerobic or anaerobic, more energy is released ?

The figure above shows the cross section of lichen. Can you identify which components are shown in green and blue?