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Why should we save, reuse and recycle paper ?

Which of the following sequences correctly represents the flow of electrons during photosynthesis?

Commercial cork is a derivative of:

Which of the following statements are true?

A cell wall is present in

The two kinds of elements present in xylem are:

Diseases that can spread from an infected person to a healthy person through air, water, food or physical contact are called __.

Justify the statement : all ores are minerals but all minerals are not ores.

I am a microbe who lives in polluted water. During the rainy season, I make many people fall ill. I can also cause a disease known as typhoid. Who am I?

The suffixes in the words below refer to _________.

why does body temperature rises when we have a fever?

Name two animals which have vanished from Satpura National Park and two animals which are still found there.

In crop rotation, growing of crop plants like wheat is alternated with growing of

All cells in our body maintain a definite shape by the help of:

Chemicals used to control weeds are:

Human heart has ___ chambers.

Why should we take antibiotics only when it is prescribed by the doctor? [1 MARK]

Write the various methods of cross pollination. [2 MARKS]

Community ecology is the

Ashes after cremation of dead bodies are immersed into river bodies. This causes __________ pollution.

The loss of water in the form of water vapour from the aerial parts of a living plant is termed as ___.

Water vapor exits and CO2 enters a leaf through the

What is the major reason for a food chain to have limited trophic levels of 3-4 only?

Which of the following is/are asexual modes of reproduction in plants?

I: Pollination

II: Vegetative propagation

III: Fragmentation

IV: Spore formation

Match the discoveries with the scientist who have made it.
$\begin{array}{cc}\text{Column I}& \text{Column II}\\ a.\text{Anton Von Leeuwenhoek}& i.\text{All animals are made of cells}\\ b.\text{Robert Hooke}& ii.\text{Microscope}\\ c.\text{Theodor Schwann}& iii.\text{Cork has boxed structures}\\ d.\text{Matthias Schleiden}& iv.\text{All plants are made of cells}\end{array}$

When forests are degraded, it can set off a devastating chain of events both locally and around the world. What is the effect of deforestation?

I. Loss of species.
II. Droughts conditions may prevail.
III. Soil properties increases
IV. Reduce global warming

Some water was added to three different soil samples and the amount of water that seeped in and got retained was noted. Can you distinguish the three different soil types based on the diagrams made? Choose the option that labels all three soil types correctly.

Which element essential for photolysis of water?

The extract of ____________ leaf is important for amino acid, fatty acid and many vital vitamins.

Name any two human diseases caused by fungi.

Chemical coordination in organisms is brought about by

The legal age for the marriage of girls in our country is :

(a) 16 years (b) 18 years (c) 21 years (d) 24 years

Which acid produced by bacteria makes the milk thicker during curd formation?

Usually, adolescence begins _____ in girls than in boys.

When do health authorities declare outbreak of disease?

Why do sex organs fully develop during adolescence and not right from the birth of an individual?

The organelle which plays an important role in cell division is:

In which type of reproduction is the body of the parent organism broken into pieces?

Which of the following are methods of irrigation?