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Which of these is an Intra-Uterine Device(IUD)?

Assertion: extra oxygen consumption is called oxygen dept

reason: extra oxygen is required to oxidize accumulated lactic acid produced during strenuous exercise

An enzyme called __________ is present in tears and saliva.

Stroke volume is the amount of blood the left ventricle pumps out in one cardiac cycle. This is around 70 ml. Now, to get the cardiac output, we have to multiply (i)__ with the normal heart rate of (ii)__ beats/min and we get (iii)__ ml/min. This means that in one minute, a normal heart pumps about (iv)__ litres of blood out.

How do contraceptive pills help to avoid pregnancy?

Which of these is FALSE about nutrition in amoeba?

World population day is observed on

What is the importance of phytoplankton?

What is the correct order in which the factors of clotting are affected in order for blood to clot?

Question 1
Can any source of energy be pollution-free? Why or why not?

Label the eye parts correctly.

Control of reflex action is through ___ .

Deficiency of iodine in an adult diet causes a disease called

The response of plants to gravity is known as geotropism. How are plant parts sensitive to gravity ? Describe with the help of a diagram.

If trait A exists in 10% of the population of an asexually reproducing species and trait B exists in 60% of the same population, which trait is likely to arise earlier.?

Lack of which of the following organelles impart flexibility to RBC to move through narrow capillaries?

Sort the steps of action of ADH on the water balance in the body (In the case of decrease in water level).

What would a non-hydrocarbon form of life look like?

Which of the following statements is INCORRECT?

13) Write one function of each :

a) Toungue

b) Pepsine

c) Villi

d) Rectum

e) Colon

f) Bike

g) Liver

h) Renin

Edward Jenner is known as the father of __.

Match the disease with the organisms which cause them.

$\begin{array}{cc}\text{Diseases}& \text{Organism}\\ \text{A. Cholera}& \text{i. Virus}\\ \text{B. Filariasis}& \text{ii. Bacteria}\\ \text{C. Quickwilt}& \text{iii. Worm}\\ \text{D. Dengue}& \text{iv. Fungus}\end{array}$

Which of the following is a gas released by the usage of petroleum and coal but not poisonous?

Are the following statements right or wrong?

Change the underlined words to correct the wrong ones.

(a) Octopus is an aquatic animal.

(b) Amphibians live both in air and in water.

(c) The function of the brain is more developed in vertebrate animals.

(d) Amoeba is a multi-cellular animal.

(a) What is meant by dialysis ? What type of patients are put on dialysis ?
(b) Explain the principle of dialysis with the help of a labelled diagram.

Adrenaline increases which of the following?

A gland W is located just below the stomach in the human body. The gland W secretes a hormone X. The deficiency of hormone X in the body causes a disease Y in which the blood sugar level of a person rises too much. The person having high blood sugar is called Z.

(a) Name (i) gland W, and (ii) hormone X.

(b) What is the function of hormone X ?

(c) Name (i) disease Y, and (ii) person Z.

(d) What advice would you like to give to a person who is suffering from disease Y due to faulty life-style ?

The release of adrenaline in our body increases:

The young ones of a cuckoo bird are fed by a crow in its nest. This behavioural pattern is called__ .

Humans have ________ pairs of chromosomes.

Question 29

Why do all the gametes formed in human females have an X chromosome?

Regarding assertion and reason, choose the correct option.

Assertion [A]: Small plant tissues can regenerate whole plants in-vitro

Reason [R]: Plant cells are totipotent

The outermost covering of the brain is called as ___ .

(a) What are the short fibres of a neuron known as?

(b) What is the long fibre of a neuron known as?