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Tuberculosis is a ________ disease.

Steps involved in the test to check the presence of starch in a leaf are shown in figure 1, 2, 3 and 4. They are not in the correct sequence. Arrange them in proper sequence?

Draw a labeled diagram of the human digestive system. [5 MARKS]

Which of the following instruments is used to observe cells?

The diaphragm relaxes during:

Match the following organelles with their cellular significance and choose the correct option from the codes.
$\begin{array}{cc}ColumnI& ColumnII\\ i).\text{Ribosome}& a.\text{Transport}\\ ii).\text{Endoplasmic Reticulum}& b.\text{Suicide bag}\\ iii).\text{Lysosome}& c.\text{Formation of Spindle Fibres}\\ iv).\text{Centriole}& d.\text{Protein synthesis}\end{array}$

Choose the correct option for the source/s of vitamin B1.

Look at the figure given below. Draw another figure of the same set-up as would be observed after a few hours.

State whether the following statements are true/ false .Give the explanation for each statement to support your answer. [5 MARKS]
(1) During heavy exercise the breathing rate of a person slows down.
(2) Plants carry out photosynthesis only during the day and respiration only at night.
(3) Frogs breathe through their skins as well as their lungs.
(4) The amount of air available on the mountains is more than that available on the ground.
(5) Glucose breaks down into lactic acid in the absence of oxygen.

Plants take in ______ and release ______ in the atmosphere during respiration.

What are the factors that sustainable development depends on? [3 MARKS]

Earthworms belong to the Phylum ____

Which of the following is a decomposable waste?

If all the plants steps performing photosynthetic process. What will happen?

During starch test, why is leaf boiled in alcohol for a short time

When a company takes masoor ki daal and puts it into a packet, it will need to give it a

Match the column I with column II:

$\begin{array}{cccc}& \text{Column-I}& & \text{Column-II}\\ \text{A.}& \text{Bulliform cells}& \text{P}& \text{Gymnosperm}\\ \text{B.}& \text{Complimentary cells}& \text{Q}& \text{Phloem}\\ \text{C.}& \text{Companion cells}& \text{R}& \text{Grass}\\ \text{D.}& \text{Non porous wood}& \text{S}& \text{Lenticel}\end{array}$

Mention the important characteristics of tropical rain forests. Which types of animals are inhabitants of this area? Explain in detail. [5 MARKS]

"All the changes in the weather are caused by the Sun." Do you agree with this statement?​ If yes, Explain.

Match the following organs/components with the elements which they help in excreting: $\begin{array}{cc}\text{Column I}& \text{Column II}\\ \text{i. Lungs}& \text{a. Low amount of nitrogenous waste}\\ \text{ii. Sebaceous secretion}& \text{b. Sodium chloride and lactic acid}\\ \text{iii. Sweat}& \text{c. Hydrocarbons, sterols and waxes}\\ \text{iv. Saliva}& \text{d. Carbon~dioxide}\end{array}$

The given picture depicts the surface of the small intestine. What is the main reason for it to be so convoluted?

The plastids responsible for the storage of fats are-

A. Chloroplasts

B. Chromoplasts

C. Leucoplasts

D. Both (A) and (B)

Assertion (A): A complex of veins beginning and ending in capillaries through which blood circulates before returning to the heart is called a portal system.

Reason (R): All mammals have a hepatic portal system.

Can we survive only on raw vegetables or grass ?Discuss.

Do you think the microorganisms in the large intestine have a role other than producing in odour in the faeces?

Choose the correct statement.

Immunoglobulin E (IgE) is a type of

Yeast is used as a raising agent in the preparation of bread. Which type of respiration happens in yeast?

Which of the following organelles are bounded by single membrane.

Which of the following is not a direct animal nutrient?

Which part of the plant is modified into pitcher-like structure in pitcher plant?

Why are the lungs internal in humans?

Which of the following are methods of asexual reproduction?

The joint which moves in all directions is

Plant germination of seven days report

Raghav used to farm on a land near a dumping site. After a period of time, his land became acidic.
Which of the following could be the reason for a change in chemical composition of his land?

The cotton like structure spread over the bread is called

Question 19
Fill in the blanks of the paragraph given below with the words provided in the box.

A word can be used more than once.

Leaves have a green pigment called (a) ___ which captures (b) ___ from sunlight. This (c) ___ is used in the process of (d) ___ and along with other raw materials like (e) ___ and (f) ___ to synthesize (g) ___ .

Honey bees make honey by collecting ___ from flowers.

The major and primary functions of the digestive system is to transfer_____ from the environment into our bodies.

Match the items listed under columns I and II

Column I Column II

1. Triticum p. indica

2. Mangifera q. melongena

3. Musca r. aestivum

4. Solanum s. domestica

Whose money is utilised for relief and rehabilitation in case of natural disasters?

If an ovary develops into fruit without fertilization, it is called ___ .

This improves the circulation of blood: