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Exhalation is a process of:

What is the difference between breathing and respiration

How lactic acid is formed ?

If a seed can be separated into two equal halves than it is;

Abhi observed the following cell parts of two different cells under a microscope. He recorded his observation in the table given.
$\begin{array}{ccc}\text{Parts of cell}& Cell{}^{\prime }{X}^{\prime }& Cell{}^{\prime }{Y}^{\prime }\\ \text{Cell wall}& \text{Present}& \text{Absent}\\ \text{Cytoplasm}& \text{Present}& \text{Present}\\ \text{Nucleus}& \text{Present}& \text{Present}\\ \text{Cell Membrane}& \text{Present}& \text{Present}\\ \text{Chloroplast}& \text{Present}& \text{Absent}\end{array}$

Identify 'X' and 'Y'

Plant prepare their own food by a process called

Why was the use of DDT banned?

The wave-like movement of the oesophagus which enables the transport of food from the mouth to stomach is called:

Mention three adaptations of cacti for life in the desert? [3 MARKS]

The breathing rate changes with respect to the:

Match the following.
$\begin{array}{cc}\text{a)Pepsinogen is secreted by}& \text{I)Liver}\\ \text{b)Trypsin is secreted by}& \text{II) Pancreas}\\ \text{c) Bile is produced in}& \text{III) Gall bladder}\\ \text{d) Bile is stored in}& \text{IV) Gastric glands}\end{array}$

Which of the following group of plants do kelps belong to?

What is a pitcher plants?

What is an anaemometer and a wind vane ?

How to make them ?

How is Wheat different from Rice?

The confirmation of carbohydrate can be done using

Natural source of pollution is

Match the following types of soils to their respective percolation rate.

Name the red pigment which carries oxygen in blood.

___ system helps in the intake of food and provides nutrition to the body.

Match the following:

Column - I Column - II

A.Manganese 1. Involved in electron transport

B.Copper 2. Role in Nitrogen fixation

C.Boron 3. Photolysis of water

D.Molybdenum 4. Maintenance of ionic balance in cells

5. Required for pollen germination

In 1000 A.D., the world population was probably about _________ million.

The flowering plants have

"Sun is the ultimate source of energy." Explain. [2 MARKS]

_____is the male sex hormone and is produced by ______.

Which of the following groups does Ostrich belong to?

Which of these has a heterotrophic mode of nutrition?

Pranav eats different kinds of food items, except fruits and vegetables. Which of the following deficiency may Pranav suffer from?

Factors responsible for soil pollution are

Fungi spoil many things during which season?

What does this sign on the packets of food substances indicate?​

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A good vector used in genetic engineering is

Which part of reproductive system is cut and ligated in case of tubectomy?

$Completethefollowingtable?$ $$\begin{array}{ccc}Digestivejuicesandenzymes& Substancedigested& ProductFormed\\ Saliva& & \\ Amylase& & \\ Gastricjuice& & \\ Protease\left(pepsin\right)andhydrochloricacid& & \\ Pancreaticjuice& & \\ Proteases\left(trypsin\right)& & \\ Lipases& & \\ Amylase& & \\ Intestinalenzymes& & \\ Peptidases& & \\ Sucrase& & \\ Lactase& & \\ Maltase& & \\ Bilefromtheliver& & \\ Bilesalts& & \end{array}$$
[5 MARKS]

Which is a symptom of dengue?

Mesocarp, endosperm and thalamus are edible in

If the older leaves of a plant show yellowing and the yield is reduced, then it may be due to the deficiency of:

What happens to the air breathed in, once it reachs the lungs

Which of the following is not a barrier method?

Which of the following is/are barrier method(s) used by females?

Choose all the correct options.

What instrument from the following is used to examine the heartbeat of a person?

The thick layer of fat found in polar bears, penguins, whales, seals and dolphins which helps protect against the cold and also aid in buoyancy is called:

The bone running through the middle of your back is