STATE TRUE OR FALSE: [5]
1. Maize and gram are examples of dicot seeds.
2. Backbone is made up of 34 small bones.
3. Cornea is a screen on which the image is formed inside our eye.
4. AIDS is a communicable disease caused by virus.
5. The Red Fort and Qutub Minar in Delhi is made of red sandstone.
Q2 GIVE ONE WORD FOR FOLLOWING: [5]
6. A fertilizer obtained from cow dung.
7. Long narrow flat bone that forms the front of the chest.
8. Part of brain that controls balance and muscle movement.
9. Microorganism causing disease like malaria.
10.A soft rock made up of mud and clay particles piled up in layers.
Q3. FILL IN THE BLANKS: [7]
11._________ is celebrated as World Water Day.
12._________ is used to produce fluorescent tubes.
13.Hydrophobia is the fear of _________.
14._________ is a disease caused by bacteria that causes sudden involuntary contraction
of muscles.
15.A fixed pulley changes the direction of _________.
16.A __________ is an inclined plane wrapped around a cylinder in the form of spiral.
17.A pulley is also called a drum or a __________.
SECTION-B
Q4. ANSWER THE FOLLOWING: [6]
18.Explain various types of crops.
19.What are tendons?
20.Which type of joints make the movement of the head possible?
Q5. ANSWER THE FOLLOWING: [6]
21.Explain various parts of seed.
22.What is the function of muscular system?
sorry this is science
Answers
Answer:
1. FALSE. Gram, pea, pumpkin all have two cotyledons in the seed, so they are dicots. Rice, wheat, maize all have one cotyledon in their seed, so they are monocots.
2. TRUE. The backbone consists of small bones known as the vertebrae. The spinal cord comprises 7 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 4 coccygeal bones. Complete answer: ... The vertebrae are divided into regions such as cervical, thoracic, lumbar, sacrum, and coccyx.
3.TRUE. The cornea and lens of an eye act together to form a real image on the light-sensing retina, which has its densest concentration of receptors in the fovea and a blind spot over the optic nerve. The power of the lens of an eye is adjustable to provide an image on the retina for varying object distances.
4. TRUE. Communicable Diseases - HIV/AIDS. Definition: AIDS is a chronic disease caused by the Human Immunodeficiency virus (HIV) that affects and destroys CD4 cells; which are a type of white blood cell that is responsible for the immune system.
5. TRUE. Made of red sandstone and marble, Qutub Minar is a 73-metre (240 feet) tall tapering tower of five storeys. Delhi, India...
6.manure
7. sternum
8.cerebellum
9. Protozoa
10. Sedimentary Rock
11. March 22
12.A fluorescent lamp tube is filled with a mix of argon, xenon, neon, or krypton, and mercury vapor. The pressure inside the lamp is around 0.3% of atmospheric pressure.
13. water
14.Tetanus
15.force
16. screw
17.sheave
18.By use, crops fall into six categories: food crops, feed crops, fiber crops, oil crops, ornamental crops, and industrial crops. Food crops, such as fruit and vegetables, are harvested for human consumption. Grains, such as corn, wheat, and rice, are the world's most popular food crops.
19.A tendon is a fibrous connective tissue which attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure.
20.The joint in the neck that allows the head to move back and forth is an example of a pivot joint. Pivot joints consist of the rounded end of one bone fitting into a ring formed by the other bone. This structure allows rotational movement, as the rounded bone moves around its own axis.
21.The three primary parts of a seed are the embryo, endosperm, and seed coat. The embryo is the young multicellular organism before it emerges from the seed. The endosperm is a source of stored food, consisting primarily of starches. The seed coat consists of one or more protective layers that encase the seed.
22.The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contractibility. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.
Answer:
a}. state true or false:
1) false
2)false
3)true
4)true
5) The first three storeys of the Qutub Minar are made of red sandstone and the last two are made of marble and sandstone.
b}. give one word for following:
6) I dont know!
7) sternum
8) cerebellum
9) malaria
10) Sedimentary rocks
c} fill in the blanks:
11) March 22
12) phosphors
13) water
14) tetanus
15) the force you exert by pulling, so you can pull down to move an object up
16) screw
17) sheave
d}. ans the following:
18) By use, crops fall into six categories: food crops, feed crops, fiber crops, oil crops, ornamental crops, and industrial crops. Food crops, such as fruit and vegetables, are harvested for human consumption. Grains, such as corn, wheat, and rice, are the world's most popular food crops.
19). A tendon (or sinew) is a tough band of fibrous connective tissue that connects muscle to bone, or muscle to muscle and is designed to withstand tension.
20). The joint in the neck that allows the head to move back and forth is an example of a pivot joint. Pivot joints consist of the rounded end of one bone fitting into a ring formed by the other bone. This structure allows rotational movement, as the rounded bone moves around its own axis.
21). The three primary parts of a seed are the embryo, endosperm, and seed coat. The embryo is the young multicellular organism before it emerges from the seed. The endosperm is a source of stored food, consisting primarily of starches. The seed coat consists of one or more protective layers that encase the seed.
22). The muscular system is composed of specialized cells called muscle fibers. Their predominant function is contract liability. Muscles, attached to bones or internal organs and blood vessels, are responsible for movement. Nearly all movement in the body is the result of muscle contraction.
work hard to ans these questions.