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Why do we smell hot food from long distance?

Which disease is caused by the micro organisms present in the water?

The pyramid of energy in a terrestrial ecosystem is:

Disease can be

This gland has two lobes and regulates the growth hormone. Could you recognise it?

Question 6

Which of the following is not an example of response to a stimulus?
(a) Watering in mouth when we see delicious food items.
(b) Closing of leaves of Mimosa plant when touched.
(c) Shutting our eyes when an object is suddenly thrown in our direction.
(d) A chick hatching out of an egg.

Q59. Consider the following statement about Creutzfeldt–Jakob disease (CJD).

1. It is a fatal brain disorder.

2. It is caused by virus.

3. It is a communicable disease.

Select the correct answer using the code given below:

The best technique of watering the fruit plants and trees is :

(a) chain pump system (b) sprinkler system (c) moat (pulley system) (d) drip system

Which of the following statement(s) is/are true about pheromones?

Which female reproductive organ is also called the womb?

In which part of the female reproductive system is the sperm deposited?

Which of the following food habits ensure good health?

What is the other name of sex cells ?

Central nervous system comprises of

Ribosomes are absent in

Rita wants to make mango jam, what should she use to preserve the jam?

I. Sugar

II. Sodium benzoate

III. Salt

IV. Sodium metabisulphite

The male and female gametes fuse to form the __ during fertilisation.

The secretion of sebaceous glands which causes acne in adolescents is known as:

A phylogenetic system of classification depends upon

Question 35
Classify the following terms into cells, tissues and organs and write in the tabular column given below.

RBC, WBC, Nerve cell, blood, muscle, blood vessels, brain, heart, hand
$\begin{array}{ccc}Cell& Tissue& Organ\\ \cdots \cdots & \cdots \cdots & \cdots \cdots \\ \cdots \cdots & \cdots \cdots & \cdots \cdots \\ \cdots \cdots & \cdots \cdots & \cdots \cdots \end{array}$

Question 14
State whether the following statements are True or False. Correct the false statements.

(i) Using good quality seed is the only criterion to get high yield.
(ii) Growing different crops in different seasons in the same field will deplete the soil of nutrients.
(iii) All crop plants are sown as seeds in the field.
(iv) Cells of root nodules of leguminous plants fix nitrogen.
(v) Freshly harvested grains must be dried before storing.

Which of the following is/are not the postulate(s) of the cell theory?

Deserts and grasslands are examples of

What disease does the deficiency of Vitamin C cause? How is it characterized? [3 MARKS]

State whether the following statements are true or false :

(a) Each sperm is a single cell.

(b) A new human individual develops from a cell called gamete.

(c) Egg laid after fertilisation is made up of a single cell.

(d) A zygote is formed as a result of fertilisation.

(e) External fertilisation takes place in frog.

(f) An embryo is made up of a single cell.

(g) Oviparous animals give birth to young ones.

(h) Oviparous animals give birth to young ones.

(i) The hens give birth to chicks like human beings give birth to babies.

(j) Amoeba reproduces by budding.

(k) Binary fission is a method of asexual reproduction.

(l) Fertilisation is necessary even in asexual reproduction.

(m) Cloning is a sexual reproduction method in mammals.

Sexual maturity in males is obtained at the age of

OscillatoriaAnabaena and Nostoc are ________ which fix atmospheric nitrogen and improve soil fertility.

Identify the given implement:

What gives a permanent image of the object?

what are crumbs?

Weeding is necessary because:

Which of the following result in outbreeding?

What type of a plant is bamboo?

Who proposed five kingdom classification and named kingdoms as Monera, Protista, Fungi, Plantae and Animalia?

The functional photosynthetic units are known as

What is eradication?

How it is caused?

Which of the following are transported by the circulatory system of our body?

The given passage has numbered blanks. Find out the word which completes the blank appropriately.

Generally, a disaster ____(1)____ in significant loss in social, psychological and economic aspects. It not only ____(2)____ to structural damages, but also leaves families torn apart, children orphaned, livelihoods destroyed and communities traumatised.

Non-structural factors such as lack of responsiveness of government officials and ineffective leadership are mainly ____(3)____ for any disaster mismanagements. India is ____(4)____ to a variety of natural and man-made disasters. Strong and effective emergency management has been a felt ____(5)____ in all corners of the world. Effective policies play a ____(6)____ role in mitigating the impact of disasters and reducing likely losses of life and property. Economic resources are important for any disaster management. Yet, it has been ____(7)____ that economic resources did not necessarily translate into greater investment in this domain as there is no ____(8)____ of issues that demand governments attention and resources. Disaster management has ____(9)____ acquired importance in the agenda of governance, unless there is a major natural or man-made disaster. The major shortcomings observed in Indian disaster management, along with their probable solutions, need to be discussed on an ____(10)____ basis.

Find out the appropriate word which fits the 4th blank.

Placenta formed between the uterine wall of the mother and the foetus is a :

Serious candidates for biological warfare include

Kharif crop used what quantity of water (match up)

a ) need less water comparatively

b) need very large quantity of water

C) need large quantity of water

What are the various practices necessary for raising animals for food and other purposes ?

Element with highest electron affinity is

Why do scientists classify organisms?