VERTEBRATES AND INVERTEBRATES (Part-I)

11. Spiders belong to the phylum [S.S.C. Online CHSL (T-1) 9.01.2017 (Shift-I)]

(a) Mollusca
(b) Annelida
(c) Cnidaria
(d) Arthropoda

Correct Answer: (d) Arthropoda

Solution:The phylum Arthropoda is the largest phylum in the animal kingdom, characterized by animals with an exoskeleton (a hard outer covering), a segmented body, and jointed appendages (like legs, antennae, and mouthparts). Spiders belong to the class Arachnida, which is a sub-group within the phylum Arthropoda. Other familiar arthropods include insects (like ants, butterflies), crustaceans (like crabs, lobsters), and myriapods (like centipedes, millipedes).

12. Spider webs are made up of _____ a natural fibre made up of protein. [S.S.C. Online CGL (T-I) 20.08.2021 (Shift-IV)]

(a) Fur
(b) Hair
(c) Wool
(d) Silk

Correct Answer: (d) Silk

Solution:Spider silk is a natural protein fiber produced by spiders from specialized glands called spinnerets. This silk is incredibly strong and elastic, allowing spiders to construct intricate webs for catching prey, for shelter, or for dispersal.

13. Which of the following is a fish? [S.S.C. Online Graduate Level (T-I) 2.09.2020 (Shift-II)]

(a) Jelly fish
(b) Lobster
(c) Salmon
(d) Whale

Correct Answer: (c) Salmon

Solution:Jelly fish and lobster are invertebrates under the genus Cilentrata and Arthropoda respectively. Whale is an animal of the Mammalia class, whereas Salmon is an animal of the fish class.

14. Which of the following animal is a mammal? [S.S.C. Online Constable GD 22.02.2019 (Shift-II)]

(a) Bull frog
(b) Tortoise
(c) Annealed
(d) Whale

Correct Answer: (d) Whale

Solution:The whale found in the oceans is a mammal animal, which does not come under the fish category. Whales directly give birth to developed babies. Whale does not lay eggs.

15. Lacrymal glands are situated in the ______ . [S.S.C. Online Graduate Level (T-I) 27.08.2016 (Shift-I)]

(a) Palms
(b) Buccal cavity
(c) Eye orbit
(d) Stomach

Correct Answer: (c) Eye orbit

Solution:Lacrimal glands are responsible for producing the aqueous layer of tears, which lubricate and protect the eye. They are located in the upper, outer part of each eye orbit (the bony socket that houses the eyeball).

16. For the aquatic organisms, the source of food is ______ . [S.S.C. Online CHSL (T-I) 20.01.2017 (Shift-I)]

(a) Phytoplankton
(b) Sea Weed
(c) Aqua plankton
(d) Zooplankton

Correct Answer: (a) Phytoplankton

Solution:Phytoplankton are microscopic, photosynthetic organisms (like tiny plants) that live in the sunlit upper layers of water bodies. They form the base of most aquatic food webs, converting sunlight into energy through photosynthesis, just like plants do on land. Zooplankton (animal plankton) feed on phytoplankton, and then smaller fish eat zooplankton, and so on.

17. Which of the following is the largest known cell? [S.S.C. Online CHSL (T-I) 15.01.2017 (Shift-I)]

(a) Eukaryotic Cell
(b) Prokaryotic Cell
(c) Mycoplasma
(d) Ostrich Eggs

Correct Answer: (d) Ostrich Eggs

Solution:The egg of an ostrich (measuring 170 mm x 130 mm) is the largest known single cell. A cell is the smallest, basic unit of the living matter that composes all the processes of life. Externally bonded by a cell membrane, it contains a mass of cytoplasm, having one or more nuclei and other organelles.

18. The scientific study of birds is called ______ . [S.S.C. Online Graduate Level (T-I) 20.08.2021 (Shift-I)]

(a) Ichthyology
(b) Ornithology
(c) Pomology
(d) Gerontology

Correct Answer: (b) Ornithology

Solution:The study of birds is called Ornithology. Any bird—whether it is a tiny hummingbird or an extra large emu—falls under the realm of ornithology. It is the scientific study of birds, and it evolved in Europe during late 16th century as humans were always fascinated by birds and their natural history.

19. Which of the following is the largest sea bird with the longest wingspan? [S.S.C. Online Graduate Level (T-I) 20.08.2021 (Shift-I)]

(a) Booby
(b) Auk
(c) Wandering Albatross
(d) Frigatebird

Correct Answer: (c) Wandering Albatross

Solution:The largest living or flying bird by wingspan is the Wandering Albatross (Diomedea Exulans family) of the sub-Antarctic oceans. The maximum dimensions in this species are a length of 1.44 m (4.7 ft) and a wingspan of 3.65 m (12.0 ft). It was the first species of albatross to be described and was long considered the same species as the Tristan albatross and the antipodean albatross.

20. Which of the following is a flightless bird? [S.S.C. Online CGL (T-I) 23.08.2021 (Shift-III)]

(a) Kiwi
(b) Hen
(c) Peacock
(d) Crane

Correct Answer: (a) Kiwi

Solution:Flightless birds are those that have lost the ability to fly through evolution. They often have reduced wing bones and strong legs.
The kiwi is a nocturnal, flightless bird native to New Zealand, known for its long beak and hair-like feathers.