VERTEBRATES AND INVERTEBRATES (Part-I)

1. Vertebrates belong to the phylum— [S.S.C. Online CHSL (T-I) 3.02.2017 (Shift-II)]

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

Correct Answer: (d) Chordata

Solution:All vertebrates belong to the subphylum Vertebrata of the phylum Chordata. There are five classes of vertebrates: fish, amphibians, reptiles, birds, and mammals.

2. Which of the following is NOT a vertebrate? [S.S.C. Online Graduate Level (T-I) 3.03.2020 (Shift-II)]

(a) Bird
(b) Mammal
(c) Fish
(d) Snail

Correct Answer: (d) Snail

Solution:The spinal cord is found in vertebrates. Birds, mammals, fish, reptiles, etc., are vertebrate animals. The snail is an invertebrate animal that does not have a spinal column.

3. Which of the following is not a characteristic of Chordates? [S.S.C. Online MTS (T-I) 21.08.2019 (Shift-I)]

(a) The central nervous system is dorsal, hollow, and single
(b) A posterior-anal part (tail) is present
(c) Notochord is absent
(d) Heart is abdominal

Correct Answer: (c) Notochord is absent

Solution:Chordates are characterized by the presence of a notochord, dorsal hollow nerve cord, and paired pharyngeal slits. They are triploblastic and possess ectoderm, mesoderm, and endoderm.

4. What is the distinctive characteristic of marsupials? [S.S.C. Online Graduate Level (T-I) 12.06.2019 (Shift-I)]

(a) They carry young ones in pouches
(b) They hibernate in winter
(c) They lay eggs
(d) They migrate from one place to another

Correct Answer: (a) They carry young ones in pouches

Solution:Marsupials are a class of mammals that carry their young for some time in a natural pouch made in the body. They do this because their babies are not as fully developed in pregnancy as in normal mammals but develop the rest after birth.

5. Which of the following creatures is oviparous? [S.S.C. Online Graduate Level (T-I) 11.06.2019 (Shift-I)]

(a) Mouse
(b) Squirrel
(c) Rabbit
(d) Frog

Correct Answer: (d) Frog

Solution:Rat, squirrel and rabbit are animals of the Mammalia group, which give birth to young, whereas the first eggs are laid by frogs, from which the tadpoles (undeveloped frogs) are first born. After tadpole metamorphosis, it takes the form of a full-fledged frog.

6. Dugong is the key animal of which biosphere conservation area? [S.S.C. Online MTS (T-1) 2.08.2019 (Shift-II)]

(a) Simlipal
(b) Gulf of Mannar
(c) Manas
(d) Great Rann of Kutch

Correct Answer: (b) Gulf of Mannar

Solution:The Dugong is a species of sea cow found throughout the warm latitudes of the Indian and western Pacific Oceans. The Gulf of Mannar Biosphere Reserve covers an area of 1,050,000 hectares on the south-east coast of India across from Sri Lanka. It is one of the world’s richest regions from a marine biodiversity perspective and comprises 21 islands with estuaries, beaches, forests of the nearshore environment, including a marine component with algal communities, sea grasses, coral reefs, salt marshes and mangroves.

7. Which of the following is an example of a marsupial? [S.S.C. Online Constable GD 2.03.2019 (Shift-II)]

(a) Zebra
(b) Turtle
(c) Kangaroo
(d) Jackal

Correct Answer: (c) Kangaroo

Solution:Among the given animals, kangaroo comes under marsupial animals. In the body of such animals, sac (or external sac) is found, in which they keep their undeveloped child till full development.

8. Which of these animals does not have jaws? [C.P.O. S.I. 5.06.2016 (Shift-II)]

(a) Trigon
(b) Shark
(c) Myxine
(d) Sphyrna

Correct Answer: (c) Myxine

Solution:Myxine is a jawless animal. It is a member of the Cyclostomata class.

9. Animals of which phylum have jointed legs? [S.S.C. Online CHSL (T-1) 19.03.2020 (Shift-I)]

(a) Arthropoda
(b) Echinodermata
(c) Mollusca
(d) Nematoda

Correct Answer: (a) Arthropoda

Solution:The phylum Arthropoda contains a wide diversity of animals with hard exoskeletons and jointed appendages or legs. Many familiar species belong to the phylum Arthropoda—insects, spiders, scorpions, centipedes, and millipedes on land; crabs, crayfish, shrimp, lobsters, and barnacles in water.

10. Which one of the following is a ruminant animal? [S.S.C. Online M.T.S. (T-1) 26.10.2021 (Shift-I)]

(a) Hen
(b) Cow
(c) Donkey
(d) Horse

Correct Answer: (b) Cow

Solution:Cow is the ruminant animal among the given option. Ruminants are herbivorous animals that digest their food multiple times, chewing and regurgitate grass or vegetation more than once and digesting it in various chambers of their stomachs.