set 1 MCQ Questions & Answers Detailed Explanation

MOST IMPORTANT general science mcq - 6 EXERCISES

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The following question based on physiology of plants, humans and animals topic of general science mcq

Questions : Which among the following have Open circulatory system?
  1. Arthropoda
  2. Mollusca
  3. Annelida
  4. Coelenterata
Choose the correct option :

(a) 1 and 3

(b) 3 and 4

(c) 1 and 2

(d) 2 and 4

The correct answers to the above question in:

Answer: (c)

Body fluids do not require specialized vessels , but flow openly in body cavity.

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Question : 1

Which of the following cells is responsible for myelin formation in the peripheral nervous system?

a) Schwann cell

b) Oligodendrocyte

c) Astrocyte

d) Microglial cell

Answer: (a)

Schwann cells form concentric rings around neurons

Question : 2

Which one is not a reflex action?

a) Release of saliva on seeing sweets

b) Closing of eye lids against fricking

c) Perspiration due to heat

d) Obeying the order to run

Answer: (c)

Reflex action is the immediate involuntary response to a stimulus. It includes sudden action of body parts due to heat stimulus, burn stimulus, pricking, sneezing, coughing yawning, etc. Perspiration is not a reflex action.

It is also known as sweating. Sweating is the loss of water from the sweat glands of the skin. Sweat includes some salts and urea. It's for temperature regulation.

Question : 3

Consider the following statements:

  1. Flowering plants are grouped under phanerogams.
  2. Non-flowering plants are grouped in cryptogams.
Which of the statement(s) given above is/are correct?

a) 1 and 2

b) 1 only

c) 2 only

d) None

Answer: (a)

All flowering plants are grouped under phanerogams while non-flowering into cryptogams

Question : 4

Which of the following would not have an effect on flowering of a particular plant species?

a) Nutritional status

b) Temperature

c) Plant age

d) Prevailing wind

Answer: (d)

Question : 5

A surge of which hormone stimulates ovulation in human females?

a) Estrogen

b) Luteinizing hormone

c) Follicle stimulating hormone

d) Progesterone

Answer: (b)

Question : 6

Which among the following have scales?

  1. Amphibians
  2. Pisce
  3. Reptiles
  4. Mammals
Choose the correct option :

a) 2 and 3

b) 3 and 4

c) 1 and 3

d) 1 and 2

Answer: (a)

Amphibians can live in aquatic as well as terrestrial habitats. The Amphibian skin is moist (without scales). The skin of Mammals is unique in possessing hair.

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