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Why do we consider Tiger an endangered species? Name and explain the government initiative to save the tiger population.
[3 MARKS]

What is the difference between immunization and vaccination?

Mushrooms are a rich source of

Which of the following hormones have a role in ovulation and menstrual cycle?

Nicotiana is a

Which of the following is not a postulate of the cell theory?

What is receptors

Read the assertions and its reasons A and B

Assertion A: Sporophyte shows 2n condition in the vegetative cell and is the plant body of higher plants.

Reason: Sporophyte develops from the spore by mitosis.

Assertion B: Gametophyte shows n condition in the vegetative cell.

Reason: Gametophyte develops from the zygote by mitosis.

On a daily basis, our food consists of cereals, pulses, vegetables and fruits. Why do we consume different variety of food materials?

Name three food materials obtained from animals.

Which among the following disease(s) is/are caused by bacteria?

(a) How do mosquitoes carry disease-causing micro-organisms and spread diseases?

(b) Mention any three ways of preventing diseases spread by mosquitoes.

Which of the following disease is not caused by viruses ?

(a) measles (b) smallpox (c) cholera (d) polio

Respiration in living things and burning are the important uses of _________ gas.

Select the incorrect statement in the following?

What happens when seeds are placed in water?

Sebaceous glands

The farmers consider sparrows a nuisance because

Which of the following can be prevented by vaccination?

Fill in the following blanks with suitable words:

(a) Alcohol is produced with the help of _________

(b) Blue -green algae fix______directly from air to enhance fertility of soil.

(c) Micro-organisms can be seen with help of a______

(d) Cholera is caused by______

(e) Common salt has been used to preserve______ and ______for ages.

(f) The food material which is preserved by pasteurisation is ______

(g) As a result of nitrogen cycle, the percentage of nitrogen in the atmosphere remains more or less.______

How many types of hormones are available in our body?

Chlamydomonas is the example of -

Why do people have different skin tones?

Question 32
Complete the crossword puzzle with the help of clues given below:

Across
1.Pollutant which was used in refrigerators and air conditioners. (18)
3.Produced on incomplete combustion of fuels (14)
6.This chemical protects our crops and is washed into water bodies from the field. (9)
Down
2.This layer protects us from harmful ultraviolet rays. (5)
4.1t is essential for combustion. (6)
5.Disease which is caused by drinking contaminated water. (7)
7. River which is famous in India and sustains most of the northern, central and eastern Indian population. (5)

Is cell membrane living ?

Question 22
Name the hormone which would be released during the following situations:

Which organelle is called the powerhouse of the cell?

Which of the following is NOT a natural enemy of pests?

From where do root hair carry out exchange of oxygen and carbon dioxide?

Write the full name of IVF.

Identify the tense of the sentence.

The nurse spoke so softly that I could not catch her instructions.

Which of the following are secondary sexual characteristics?

When we touch the leaves of a touch-me-not plant, they begin to fold up and droop. What kind of movement is observed here?

Are atoms smaller than cells?

The main function of the pheripheral nervous system is

During which time the adolescent girls should take special care of personal hygiene?

The right meal for adolescents consists of :

(a) chips, noodles, coke (b) chapati, dal, vegetables

(c) rice, noodles, and burger (d) vegetable cutlets, chips, and lemon drink.

Fill in the following blanks with suitable words :
(a) Deforestation increases the level of ___ in the atmosphere.
(b) Species found only in a particular area is known as ___ species.
(c) A place where animals are protected in their natural habitat is called ___
(d) Satpura National Park is a part of ___ Biosphere Reserve.
(e) Red Data Book contains a record of ___ species.
(f) Migratory birds fly to far away places because of ___ changes.
(g) In reforestation, the planted trees should be generally of the same ___ which were cut down in that forest.
(h) Paper can be ___ recycled to ___ times.

The transport in xylem in usually unidirectional, whereas in phloem it is __.

Name the 3 types of papillae

Which of the following is NOT true for organisms in kingdom Animalia?

In the following food chain, which organisms will have the least energy?

Grass→Grasshopper→Frog→Snake→Eagle