Biology – Page 72 of 95

711. In male reproductive system, the testes are situated outside the abdominal cavity within a pouch called __________.

1. Glands
2. Scrotum
3. Testicular Lobules
4. Seminiferous Tubules

Option “2” is correct
In male reproductive system, the testes are situated outside the abdominal cavity within a pouch is called Scrotum.

712. Which of the following is not among the three main classes of Algae?

1. Chlorophyceae
2. Rhodophyceae
3. Phaeophyceae
4. Gymnosperms

Option “4” is correct
The gymnosperms are a group of seed-producing plants.

713. Which part of the animal cell is called power house?

1. Cell wall
2. Nucleus
3. Mitochondria
4. Entire cell

Option “3” is correct
Mitochondria are sometimes described as “the powerhouse of the cell” as they generate energy.

714. The number of bones in an adult human body is-

1. 204
2. 206
3. 208
4. 210

Option “2” is correct
The skeleton of an adult human body consists of 206 bones. It is composed of 213 bones in a child, which decreases to 206 bones by adulthood after some bones have fused together.

715. What are vitamins?

1. Organic Compound
2. Inorganic Compound
3. Living organism
4. None of these

Option “1” is correct

Vitamins are organic compounds and a vital nutrient that an organism requires in limited amounts.

716. Haemophilia is-

1. Caused by bacteria
2. Caused by Virus
3. Caused by pollutants
4. A hereditary defect

Option “4” is correct
Haemophilia is a genetic sex-linked disease in which blood clotting takes a long time in a patient (up to 24 hours) due to lack of thromboplastin protein in blood plasma.

717. The radio isotope used in the detection of tumor is-

1. Arsenic – 74
2. Cobalt – 62
3. Sodium – 24
4. Carbon – 14

Option “1” is correct
Arsenic – 74 tracer is used to detect the presence of tumours.

718. What does the philatelist do?

1. Collects the coins
2. Collects stamps
3. Collects the pictures of birds
4. Collects the feathers

Option “2” is correct
Philatelist collects postage stamps.

719. Potato is a:

1. Root
2. Fruit
3. Tuber
4. Bulb

Option “3” is correct
Potatoes grow underground, but the part we eat is not a root. It is an underground stem called a tuber.

720. Match the following-

1. a
2. b
3. c
4. d

Option “1” is correct
The correctly matched is-

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