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The following question based on genetics, evolution of life & ecological biodiversity topic of general science mcq

Questions : Polar bears are carnivores and prey on many arctic birds and fishes. However, under natural conditions, no one found polar bears predating any penguin. This is because

(a) polar bears and penguins never coexist under natural conditions. The former lives in the North Pole while the latter lives in the South Pole

(b) penguins have chemical substance in their muscles which is toxic to polar bears

(c) penguins are gregarious and always move in groups. Therefore, a polar bear cannot approach them

(d) None of these

The correct answers to the above question in:

Answer: (b)

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Read more genetics evolution of life and ecological biodiversity Based General Science Questions and Answers

Question : 1

In terms of the evolution of organisms, which one among the following is the most advanced?

a) Shark

b) Bat

c) Pigeon

d) Vulture

Answer: (b)

Question : 2

Sex-determination by environmental factors is commonly observed in

a) Melandrium album

b) Mirabills jalapa

c) Drosophila melanogaster

d) Bonellia viridis

Answer: (d)

The Green Spoonworm (Bonellia viridis) is a marine worm noted for displaying exceptional sexual dimorphism due to environment factors.

Question : 3

Consider the following statements :

  1. Test is used to determine an unknown genotype within one breeding generation.
  2. Test cross is a cross between $F_1$ hybrid and dominant parent.
  3. Test cross is a cross between $F_1$ hybrid and recessive parent.
Which of the statement(s) given above is/are false about test cross?

a) 3 only

b) 2 only

c) 1 only

d) 1, 2 and 3

Answer: (b)

Test Cross involves the breeding of a dominant trait individual with a homozygous recessive individual, in order to determine the zygosity of the former by analysing proportions of offspring with the recessive phenotype.

Question : 4

Organisms which display properties of both living and non-living are

a) Lichens

b) Viruses

c) Diatoms

d) Bacteria

Answer: (b)

Question : 5

A modification of leaf is

a) Cladode

b) Tendrils

c) Phylloclade

d) Corm

Answer: (b)

Question : 6

Gaucher’s disease is associated with abnormal metabolism of

a) protein

b) nucleic acid

c) fat

d) carbohydrate

Answer: (c)

Gaucher’s disease is a genetic disease in which a fatty substance (lipid) accumulates in cells and certain organs. The disorder is characterized by bruising, fatigue, anemia, low blood platelets, and enlargement of the liver and spleen.

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