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A particular tribe mostly irrigates their fields by a dipping lift, from temporary wells or from water-holes in rivers. In this form of lift, there is a hollowed tree trunk worked on a fulcrum, with a weight at one end and a bucket or kerosene tin suspended from the other. This raises the water a few feet.

Identify the irrigation system used by the tribe.

Why are arteries deep seated

The first stable product in CAM/C4 plants is

What is biodiversity ? Why it is different in different places ?

Biodiversity serves the ecosystem by

Arrange the coal types on the basis of carbon content in increasing order:

Ribosomes are sites for synthesis of

How does the traditional sowing tool work?

Muscular sheet that forms the floor of thoracic cavity is known as ___.

What are eukaryotic cells?

Describe the threat to the beauty of the Taj Mahal

Can a microbe attack on other microbe

For example,

Can a fungi get a viral disease or a bacteria get a fungal attack?

Question 24
The table given below has certain terms and four blank spaces named A, B, C, and D

From the options given below choose the correct combination of terms.

(a) A-Pseudopodia; B-Respirations; C-Muscle cell; D-Branched
(b) A-Pseudopodia; B-Photosynthesis; C-Muscle cell; D-Branched
(c) A-Contractile vacuole; B-Photosynthesis; C-Blood cell; D-Spindle shaped
(d) A-Pseudopodia; B-Photosynthesis; C-Cheek cell; D-Spindle shaped​​​​​​​

Name the endocrine gland which secretes the growth hormone.

describe the mamary glands

Give any four differences between manures and fertilisers.

Question 19
Under a microscope, Paheli observes a cell that has a cell wall but no distinct nucleus. The cell that she observes is

(a) a plant cell
(b) an animal cell
(c) a nerve cell
(d) a bacterial cell

To curb pollution, the government decided to collect data from various companies. For this, government executives were sent to the respective companies to collect the required data. What kind of data is it?

Infectious proteins are

Hormone insulin is secreted by___

There are organisms which are composed of a single cell and this single cell performs all the vital functions of that organism. Such an organism is called___.

Fill in the following blanks with suitable words :

(a) Sexual maturity is reached at___

(b) The changes which occur in boys and girls at puberty are brought about by various___

(c) Initially, girls grow___than boys.

(d) The changes occurring in body and mind during adolescence are a natural part of___up.

(e) The features which help us to distinguish between a mature boy and a girl are called___sexual characteristics.

(f) The onset of puberty is controlled by___

(g) Menstrual cycle in women is controlled by___

(h) Each normal body cell in humans contains___pairs of chromosomes out of which___pair is of sex chromosomes.

(i) X and Y chromosomes are called___chromosomes.

(j) Early marriage and motherhood cause health problems in the___and the___

(k) The protective foods are___and___

(l) Thyroid and adrenals secrete their hormones when they receive instructions from___gland through its hormones.

(m) Metamorphosis in amphibians is brought about by___hormone.

Name one Goverment A gency which is involved in procuring food grains (like wheat and rice) from farmers and storing them properly.

Which of these is/are the vegetative part(s) of the plant?

The nutrients which are required by the plants in large quantities are called

What are the vitamins and minerals which help in neutralizing the free radicals that can have damaging effect on the retina called?

The cell membrane is

Cartilages and bones are types of _______.

Which of the following is not a characteristic of a national park?

In ETC, first ATP is formed when hydrogen passes from

Leaves of water lillies have a coating on them to prevent them from ___ .

Water will be absorbed by root hair by

Why do animal cells contain more mitochondria than plant cells?

Vegetative propagation is a mode of:

What gives the eye the power of accommodation?

Question 30
Terms related to agricultural practice are given below. Rearrange them in the correct sequence.
harvesting, sowing, manuring, tilling and ploughing, irrigation, de–weeding

What are the cells that are sensitive to bright light called and low light called?
[2 MARKS]

The most abundant element found in plants is

The size of a cell in bigger bodies/animals cannot be necessarily bigger than a smaller body or animal. Justify the statement

Which of the following organisms reproduced by binary fission ?

(a) Hydra

(b) Yeast

(c) Amoeba

(d) Sea anemone

How pancreas helps in regulating blood sugar level?

The two crops which are not grown by sowing theri seeds directly into the soil in large fields are :

A. Peas B. Tomatoes C. Chillies D. Maize

(a) A and B (b) B and C (c) A and C (d) only C

Which of the following changes are observed during puberty?

I. Increase in height

II. Development of hair in armpits and groin area.

III. Pain in joints and knees.

IV. Discoloration of nail fingers.

V. Development of reproductive organs.

Where is ATP formed in a cell?

___ is the process of the maturation of the female gametes in the ovary.