Vertebrates And Invertebrates (Biology) (Part-II)

Total Questions: 25

11. Paramecium reproduces by— [S.S.C. Online Constable GD 19.02.2019 (Shift-II)]

Correct Answer: (d) Binary fission
Solution:Paramecium is a single-celled ciliate protozoan. Its primary mode of asexual reproduction is binary fission, where the cell elongates and then divides into two roughly equal daughter cells. It also undergoes sexual reproduction through conjugation, but binary fission is its common method of proliferation.

12. Octopus belongs to the phylum ______ . [S.S.C. Online CHSL (T-I) 10.01.2017 (Shift-I)]

Correct Answer: (a) Mollusca
Solution:Octopuses are cephalopods, and cephalopods are a class within the phylum Mollusca. Molluscs are soft-bodied invertebrates, often with a shell (though octopuses have a reduced or absent internal shell). Other molluscs include snails, slugs, clams, and squids.

13. Which of the following types of organisms have an open circulatory system? [S.S.C. Online CHSL (T-I) 19.03.2020 (Shift-III)]

Correct Answer: (a) Mollusca
Solution:In an open circulatory system, blood (hemolymph) is pumped by a heart into a body cavity called a hemocoel, where it directly bathes the organs before returning to the heart. This is in contrast to a closed circulatory system where blood is always contained within vessels (like in humans).

14. The mouth of mollusca contains a file-like rasping organ for feeding which is called ______ . [S.S.C. Online MTS (T-I) 20.08.2019 (Shift-II)]

Correct Answer: (c) Radula
Solution:The radula is a unique anatomical structure found in the mouth of most Mollusca. It is a chitinous ribbon, often bearing rows of teeth, that is used for scraping or cutting food. Snails use it to graze algae, while some predatory mollusca use it to drill into shells.

15. What are dolphins, porcupines and hell fishes called? [S.S.C. Online Constable GD 15.02.2019 (Shift-II)]

Correct Answer: (a) Cetacean
Solution:Dolphins, porcupines and whales are called cetaceans. These are aquatic mammals. Their body is streamlined and streamlined. These are completely aquatic and large sized organisms.

16. If a healthy freshwater fish is placed in salt water, what will be the expected consequences? [S.S.C. Online Graduate Level (T-I) 7.09.2016 (Shift-III)]

Correct Answer: (a) The fish becomes dehydrated and dies
Solution:If a healthy freshwater fish is placed in salt water, it will dehydrate and die. Because the concentration of salt water is higher than the concentration of fish body water and water of lower concentration (due to more free energy) flows towards more concentrated salt water. As a result the fish becomes dehydrated and dies.

17. Which of these following diseases is also known as 'Myopia'? [S.S.C. JE Mechanical Exam 22.03.2021 (Shift-II)]

Correct Answer: (d) Near-sightedness
Solution:Nearsightedness (myopia) is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry. It occurs when the shape of your eye causes light rays to bend (refract) incorrectly, focusing images in front of your retina instead of on your retina.

18. Myopia affects which of the following organs? [S.S.C. Online CHSL (T-I) 25.01.2017 (Shift-III)]

Correct Answer: (c) Eyes
Solution:Nearsightedness (myopia) is a common vision condition in which you can see objects near to you clearly, but objects farther away are blurry. It occurs when the shape of your eye causes light rays to bend (refract) incorrectly, focusing images in front of your retina instead of on your retina.

19. The exchange of gases in a mammal takes place in _____ . [S.S.C. Online MTS (T-I) 20.09.2017 (Shift-I)]

Correct Answer: (d) Alveoli
Solution:In mammals, the respiratory system includes the trachea, bronchi, bronchioles, and finally, tiny air sacs called alveoli. The alveoli are where the crucial exchange of oxygen (from inhaled air into the blood) and carbon dioxide (from the blood into the air to be exhaled) occurs, across their very thin walls, facilitated by a rich capillary network.

20. Which of the following has a vascular circulatory system? [S.S.C. Online C.P.O.S.I. (T-I) 5.01.2017 (Shift-II)]

I. Cockroach
II. Human
III. Shrimp

Correct Answer: (b) I and III
Solution:Cockroach, Shrimp, Spider, Mosquito etc. are the organisms of Arthropoda phylum. In these, the vascular or open circulatory system is found. In which heart and blood vessels are there, but capillaries are not found. Blood Lacunae are found in these.