SSC CHSL 2017 PYQs

Question 1

What is the total number of bones in the human body?

Accepted Answer

The adult human skeletal system is composed of 206 bones. This is a fundamental fact about human anatomy.

Question 2

Which of the following is a symptom of haemophilia?

Accepted Answer

Haemophilia is a genetic disorder where the blood's ability to clot is severely reduced, leading to prolonged bleeding after injury. Therefore, 'no clotting of blood' is the correct symptom.

Question 3

Brain fever is a disease spread through which of the following?

Accepted Answer

Brain fever, commonly known as Japanese Encephalitis, is primarily transmitted to humans through the bite of infected mosquitoes, particularly from the Culex species.

Question 4

Azadirachata indica is the scientific name of

Accepted Answer

Azadirachta indica is the widely recognized scientific name for the Neem tree, known for its medicinal properties.

Question 5

...........is a typically onecelled, reproductive unit capable of  giving rise to a new individual without sexual fusion.

Accepted Answer

A spore is a reproductive cell, typically one-celled, that can develop into a new organism without sexual fusion, common in fungi, algae, and plants.

Question 6

Achras sapota is the scientific name of

Accepted Answer

Achras sapota is the botanical name for Chiku, also known as Sapodilla. This is a direct recall of a scientific name.

Question 7

Which plants have root nodules?

Accepted Answer

Leguminous plants form root nodules containing nitrogen-fixing bacteria (Rhizobium). This symbiotic relationship allows them to convert atmospheric nitrogen into usable forms for plant growth.

Question 8

Tectona grandis Linn is the scientific name of

Accepted Answer

Tectona grandis Linn is the scientific name for Teak, a tropical hardwood tree. This is a direct recall of a common scientific name.

Question 9

Carotene in fruits and vegetables gives it which color?

Accepted Answer

Carotene is a pigment responsible for the vibrant orange and yellow colors seen in many fruits and vegetables, such as carrots and pumpkins.

Question 10

The process of producing energy in plants is known as

Accepted Answer

Plants produce their own food, and thus energy, through the process of photosynthesis, using sunlight, water, and carbon dioxide.

Question 11

Emblica officinalis is the scientific name of

Accepted Answer

Emblica officinalis is the botanical name for Amla, also known as Indian gooseberry. Recognizing common scientific names is key here.

Question 12

The process of pollination by birds is also known as

Accepted Answer

Pollination by birds is specifically termed Ornithophily. This term is derived from 'ornithos' meaning bird, and 'philein' meaning to love.

Question 13

Mangroves are plants that have

Accepted Answer

Mangroves thrive in oxygen-deficient soil. They develop specialized roots called pneumatophores or respiratory roots to absorb oxygen directly from the atmosphere.

Question 14

Octopus belongs to the phylum

Accepted Answer

Octopus is an invertebrate with a soft body and a mantle, which are defining characteristics of the phylum Mollusca. This makes option 1 correct.

Question 15

Bacteria was discovered by

Accepted Answer

Antonie van Leeuwenhoek is credited with the discovery of bacteria in 1676, observing them through his self-made microscopes.

Question 16

Prawn belongs to the phylum

Accepted Answer

Prawns are invertebrates with an exoskeleton and segmented bodies, which are defining characteristics of the phylum Arthropoda. This is a direct classification fact.

Question 17

Earth-worms belongs to the phylum

Accepted Answer

Earthworms are segmented worms belonging to the phylum Annelida. This phylum includes all segmented worms, characterized by their metameric segmentation.

Question 18

Sea-Anemones belongs to the phylum

Accepted Answer

Sea-Anemones are marine invertebrates characterized by stinging cells, placing them in the phylum Cnidaria. This is a direct recall of biological classification.

Question 19

Equus Caballus is the scientific name of _________.

Accepted Answer

Equus Caballus is the binomial nomenclature for the domestic horse. This is a direct recall of a common scientific name.

Question 20

Which Virus causes Chicken Pox?

Accepted Answer

Chickenpox is caused by the Varicella-zoster virus, which is also known as Herpes Zoster Virus. It's a common childhood infection.