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What happens when

(a) Dry apricots are left for sometime in pure water and later transferred to sugar solution?

(b) A Red Blood Cell is kept in concentrated saline solution?

(c) Rheo leaves are boiled in water first and then a drop of sugar syrup is put on it?

(a) Name the scientist who gave the theory of the origin of life on earth. What is this theory?
(b) How are those species which are now 'extinct' studied?

What is the function of receptors in human body ? What are the types of receptors found in humans ?

A cross is made between true breeding lines of pea plants with axillary and terminal flowers. If 1240 progeny are obtained, what is the ratio between homozygous plants and heterozygous plants of $F_2$ progeny?

The absorption of water from the surrounding soil by root depends completely on the characteristics of __________

Assertion: Each organelle has a specific function in the cell.

Reason: An organ is a group of tissues which perform a similar function.

Consider the following statements:
A. In the Tundra region, animals have thick fur and thick skin.
B. Most of the animals in grasslands are herbivores.
C. In tropical rain forests, many animals live on trees.
Which of the following best explains these statements?

Differentiate between the following pairs :

(a) Menarche and menopause

(b) Bulbo-urethral gland and prostate gland.

(c) Hymen and clitoris

(d) Uterus and vagina

(e) Efferent duct and sperm duct.

Arrange the following events of the menstrual cycle in correct sequence.

a) release of an egg from the ovary

b) breakdown of the thickened inner wall of the uterus

c) thickening of the wall of the uterus

d) maturation of the ovum

Which hormone regulates the secretion of adrenal gland

How the government of Tamilnadu is taking effective measures to stop plastic pollution?

Oocyte is released from the ovary only after completing

Which of the following is the common passage for both digestive and respiratory systems?

Match the following:

$$\begin{array}{cccc}& \text{A}& & \text{B}\\ \text{1}& \text{Bile juice}& \text{a}& \text{Carbohydrate digestion}\\ \text{2}& \text{Trypsin}& \text{b}& \text{Digestion of fats}\\ \text{3}& \text{Lipase}& \text{c}& \text{Emulsification of fats}\\ \text{4}& \text{Amylase}& \text{d}& \text{Digestion of proteins}\end{array}$$

Question 3

In evolutionary terms, we have more in common with



(a) A Chinese school-boy

(b) A chimpanzee

(c) A spider

(d) A bacterium

Which of the following methods of reproduction are employed by Hydra?

Why are some plants or animals called hosts?

Which of the following statements is true for vegetative propagation?

What are the scheme of travelling of nerve impulse in the body?

Which is the bag-like structure that receives food from the food pipe?

Select the group of different substances that make soil rich in nutrients.

Budding is observed in ______.

Does dna makes its replica by fission or what happens. And what happens during dna copying. Explain in detail

Match the following:

Column - I Column - II

A. Aquaporins 1. Transport two molecules in opposite direction

B. Uniporters 2. Use energy to carry substances

C. Symporters 3. Water channels

D. Antiporters 4. Transport two molecules in the same direction

E. Pumps 5. Transport one molecule

Generally, blood vessels which carry pure blood are called _____.

If blood flows through heart only once for completing one circulation it is called___.

World environment day is celebrated on__________.

The part of the respiratory tract that is responsible for keeping healthy is

The renal corpuscle is composed of the glomerulus and _______.

Our nervous system helps us in controlling all the functions of our body. It is made up of nervous tissue. Name the cell that make up the nervous tissue. Draw a well labelled diagram of the same.

Suppose you have a small rose plant growing in a pot. How would you demonstrate transpiration in it ?

Identify the following images i to iv and choose the correct option.

Natural killer cells

(a) make a person look old pretty quickly.

(b) are produced in large numbers when we stay awake.

(c) help us fight viruses and bacteria.

(d) work well even for sleep-deprived people.

Identify the odd one in each of the following and mention what the rest are :

(a) Larynx; glucagon; testosterone; prolactin......................................

(b) Adrenaline; penicillin; insulin; thyroxin.................................

(c) Stomach; ileum; liver; adrenaline.............................

(d) TSH; GH; ADH; insulin.................................

(e) Iodine, cretinism, goitre, myxoedema............................