ZOOLOGY MISCELLANEOUS (Part-I)

📆 November 7, 2024

Total Questions: 41

21. _____ is the movement of molecules across a cell membrane from a region of their lower concentration to a region of their higher concentration. [S.S.C. Online CHSL (T-I) 20.01.2017 (Shift-II)]

(a) Diffusion
(b) Osmosis
(c) Active Transport
(d) Passive Transport

Correct Answer: (b) Osmosis

Solution:The movement of a liquid solvent from its lower concentration to a region of higher concentration through a semipermeable membrane is called osmosis. This is a special type of diffusion, which occurs through a semipermeable membrane.

22. _____ is the fourth state of matter. [S.S.C. Online CHSL (T-I) 29.01.2017 (Shift-II)]

(a) Plasma
(b) Steam
(c) Gas
(d) Matteroid

Correct Answer: (a) Plasma

Solution:The four fundamental states of matter commonly discussed are solid, liquid, gas, and plasma. Plasma is an ionized gas, meaning it's a gas in which a certain proportion of the particles are ionized (atoms or molecules have lost or gained electrons), forming ions and free electrons. It is the most abundant state of matter in the universe (e.g., in stars).

23. Which of the following is a large bean-shaped lymphoid organ in the human body? [S.S.C. Online C.H.S.L. (T-I) 16.04.2021 (Shift-I)]

(a) Lymph node
(b) Thymus
(c) Tonsil
(d) Spleen

Correct Answer: (d) Spleen

Solution:The spleen is the largest lymphoid organ in the body, located in the upper left part of the abdomen, under the ribcage. It plays a crucial role in the immune system (filtering blood, storing white blood cells) and in the circulatory system (recycling old red blood cells, storing blood). Lymph nodes are also lymphoid organs, but they are typically much smaller and distributed throughout the body.

24. Which of the following is a trace mineral found in the human body? [S.S.C. Online C.H.S.L. (T-I) 15.04.2021 (Shift-I)]

(a) Sulfur
(b) Magnesium
(c) Selenium
(d) Phosphorus

Correct Answer: (c) Selenium

Solution:Selenium (Se) is an essential trace element. The Selenium content in the human body is about 13-20 mg. Selenium containing protein also known as seleno-protein carries out various functions in normal health and metabolism.

25. A fresh egg when placed in salt water will— [S.S.C. Online Graduate Level (T-I) 6.09.2016 (Shift-II)]

(a) sink and go to the bottom
(b) sink but will not go to the bottom
(c) float
(d) burst

Correct Answer: (c) float

Solution:Saltwater is denser than fresh water because of its salt content. The egg will sink in the fresh water because it has greater density than the water. The egg will float in the salt water because when salt is added to water its density becomes greater than that of the egg.

26. In a Punnett Square with the cross AaBb × Aabb, how many AaBb genotypes would be created? [S.S.C. Online CHSL (T-I) 29.01.2017 (Shift-II)]

(a) 4
(b) 7
(c) 1
(d) 6

Correct Answer: (a) 4

Solution:4 times
AaBb × Aabb → AABb AaBb AaBb AAbb

Pairs →

	Ab	ab
AB	AABb	AaBb
Ab	AaBb	Aabb
aB	AaBb	Aabb
ab	Aabb	aabb

Two terms will be added to the Punnett Square.

27. With the cross AaBb × AaBb in Punnett Square, how many Aabb genotypes will be formed? [S.S.C. Online CHSL (T-I) 27.01.2017 (Shift-III)]

(a) 1
(b) 8
(c) 2
(d) 3

Correct Answer: (c) 2

Solution:2 times
AaBb × AaBb →

Pair →

	AB	Ab	aB	ab
AB	AABB	AABb	AaBB	AaBb
Ab	AABb	AAbb	AaBb	Aabb
aB	AaBB	AaBb	aaBB	aaBb
ab	AaBb	Aabb	aaBb	aabb

28. Acidity that occurs in the stomach after eating can be ended by taking it— [S.S.C. Online Constable GD 18.02.2019 (Shift-III)]

(a) Vegetables
(b) Baking soda
(c) Lemon juice
(d) Fruit juice

Correct Answer: (b) Baking soda

Solution:In the stomach of humans, hydrochloric acid (HCl) is secreted to break down the proteins present in the food. Acidity occurs when more than the normal amount is produced in the stomach. It can be treated with the help of baking soda (NaHCO₃). An aqueous solution of baking soda exhibits alkaline symptoms, due to which the excess acid in the stomach is neutralized by it.

29. General anaesthetic was invented by _____ . [S.S.C. Online CHSL (T-I) 15.01.2017 (Shift-I)]

(a) Alfred P. Southwick
(b) Isaac Singer
(c) Murasaki Shikibu
(d) Hanaoka Seishu

Correct Answer: (d) Hanaoka Seishu

Solution:The general anesthetic was invented by Hanaoka Seishu. He was a Japanese surgeon. He did the first surgical treatment in the world under general anesthetic by treating breast cancer in 1804 AD.

30. Which of the following statement is correct? [S.S.C. Online CPO S.I. (T-I) 11.11.2022 (Shift-III)]

I. When any plane passing through the central axis of the body divides the organism into two identical halves, it is called radial symmetry.
II. Where the body can be divided into identical left and right halves in only one plane, exhibit bilateral symmetry.

(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II

Correct Answer: (c) Both I and II

Solution:There are three types of symmetry- Bilateral, Radial, and Asymmetrical.

Bilateral Symmetry: Animals, whose bodies can be divided into left and right halves, are said to be bilaterally symmetrical. For example, Platyhelminthes, Annelida, Arthropoda, Chordata, etc.

Radial Symmetry: Animals whose bodies can be divided into two halves from any plane passing through the centre of the body are said to be radially symmetrical. For example, Coelenterates, Echinoderms, and Ctenophores.

Asymmetrical:
Few animals cannot be divided into two equivalent parts, along with any plane going through the central point of the organism. Therefore, they are said to be asymmetrical.

For example, Sponges.

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