ZOOLOGY MISCELLANEOUS (Part-I)

31. Male mosquitoes take their food from— [S.S.C. Online Graduate Level (T-I) 30.08.2016 (Shift-III)]

(a) human blood
(b) stagnant water
(c) sap of plants
(d) dung and debris

Correct Answer: (c) sap of plants

Solution:Only female mosquitoes bite humans and animals to feed on blood, as they require the protein and nutrients in blood for egg production. Male mosquitoes, on the other hand, feed exclusively on plant sap, nectar, and other sugary fluids.

32. Which is the largest organ in human beings? [S.S.C. Online CHSL (T-I) 7.01.2017 (Shift-III)]

(a) Skin
(b) Large Intestine
(c) Small Intestine
(d) Liver

Correct Answer: (a) Skin

Solution:The skin is the largest organ of the human body by both surface area and weight. It forms a protective barrier against the external environment, regulates body temperature, and contains sensory receptors.

33. Which cell disorder in our body is responsible for colour blindness? [S.S.C. Online Graduate Level (T-I) 8.09.2016 (Shift-I)]

(a) WBC
(b) Cone Cell
(c) Rod Cell
(d) Neurons

Correct Answer: (b) Cone Cell

Solution:Color blindness occurs when there is a problem with the pigments in certain nerve cells of the eye that sense color. These cells are called cones. They are found in the light-sensitive layer of tissue at the back of the eye, called the retina.

34. There are ______ uterus in women. [S.S.C. Online Graduate Level (T-I) 22.08.2017 (Shift-III)]

(a) One
(b) Two
(c) Twice
(d) Four

Correct Answer: (a) One

Solution:Typically, women have one uterus (womb), a muscular organ located in the pelvis where a fetus develops during pregnancy. In rare cases, anatomical abnormalities can lead to a double uterus (uterus didelphys), but the normal human anatomy includes a single uterus.

35. The outermost layer of skin is ______ . [S.S.C. Online CHSL (T-I) 11.01.2017 (Shift-I)]

(a) Epidermis
(b) Dermis
(c) Tissues
(d) Hypodermis

Correct Answer: (a) Epidermis

Solution:Epidermis is the outermost layer of skin on your body. It protects your body from harm, keeps your body hydrated, produces new skin cells and contains melanin, which determines the color of your skin.

36. Which of the following alloys is commonly used in orthodontics for wires and brackets, which join teeth? [C.P.O. S.I. 7.06.2016 (Shift-I)]

(a) Austenite
(b) Nitinol
(c) Alnico
(d) Nichrome

Correct Answer: (b) Nitinol

Solution:Nitinol is a nickel-titanium alloy known for its super elasticity and shape memory properties. These characteristics make it ideal for orthodontic wires and brackets, as it can be easily shaped and then exert a constant, gentle force to move teeth, returning to its original shape when heated.

37. Which is the longest vein in the human body? [C.P.O. S.I. 6.06.2016 (Shift-I)]

(a) Trochlear
(b) Inferior vena cava
(c) Saphenous vein
(d) Trigeminal

Correct Answer: (c) Saphenous vein

Solution:The great saphenous vein (GSV) is the longest vein in the human body. It runs along the length of the lower limb, from the foot up to the groin, where it drains into the femoral vein.

38. Name the longest muscle in the human body. [C.P.O. S.I. 6.06.2016 (Shift-I)]

(a) Sartorius muscle
(b) Masseter muscle
(c) Stapedius muscle
(d) Gluteus maximus muscle

Correct Answer: (a) Sartorius muscle

Solution:The longest muscle in your body is the sartorius, a long thin muscle that runs down the length of the upper thigh, crossing the leg down to the inside of the knee. The primary functions of the sartorius are knee flexion and hip flexion and adduction.

39. Otorhinolaryngology deals with which of the following parts of the human body? [C.P.O. S.I. 4.06.2016 (Shift-I)]

(a) Ear, neck, throat
(b) Ear, nose, throat
(c) Eye, ear, nose
(d) Eye, tongue, nose

Correct Answer: (b) Ear, nose, throat

Solution:The word otorhinolaryngology or its shorter form, otolaryngology, is derived from the Greek root words: otos (ear), rhino (nose), laryngo (windpipe) and logos (science). So an otorhinolaryngologist is a physician who studied, trained in, and treats diseases of the ear, nose, throat, face, head and neck. The popular acronym for this specialty branch of medicine is ENT, or an ear, nose, and throat specialist.

40. The process of pollination by birds is also known as _____ . [S.S.C. Online CHSL (T-I) 9.01.2017 (Shift-I)]

(a) Hydrophily
(b) Entomophily
(c) Embryophily
(d) Ornithophily

Correct Answer: (d) Ornithophily

Solution:Pollination by birds is called Ornithophily. Pollination is an important process for flowering plants to survive. Since most flowering plants cannot pollinate on their own, they have to rely on other animals. Many small birds, such as sunbirds and hummingbirds are key pollinators.