Darwinism explains all the following except:

1. Within each species, there is variation

2. Organisms tend to produce more offspring than can survive

3. Offspring with better traits that overcome competition are best suited for the environment

4. Variations are inherited from parents to offspring through genes

Subtopic:  Darwin's Theory |
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Theory of pangenesis was given by:

1. Darwin

2. Lamarck

3. Hugo de Vries

4. Oparin

Subtopic:  Darwin's Theory |
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Which of the following is not true for a species?

1. Members of a species interbreed

2. Variations occur among members of species

3. Each species is reproductively isolated from every other species

4. Gene flow does not occur between the populations of a species

Subtopic:  Hardy Weinberg Law |
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The diversity in the type of beaks of finches adapted to different feeding habits on the Galapagos islands, as observed by Darwin, provides evidence for:

1. origin of species by natural selection

2. intraspecific variations

3. intraspecific competition

4. interspecific competition

Subtopic:  Darwin's Theory | Concept of Organic Evolution: Evidence |
 54%
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Age of fishes is also known as:

1. Permian Era

2. Silurian Era

3. Devonian Era

4. Ordovician Era

Subtopic:   A BRIEF ACCOUNT OF EVOLUTION |
 65%
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If the Bengal tiger becomes extinct:
1. Hyenas and wolves will become scarce.
2. Its gene pool will be lost forever
3. The wild areas will be safe for man and domestic
4. The population of beautiful animals like deer will get stabilized
 70%
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Variations caused by mutation, as proposed by Hugo de Vries, are:

1. small and directionless 2. random and directional
3. random and directionless 4. small and directional

Subtopic:  Mechanism of Evolution |
 79%
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NEET - 2019
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A gene locus has two alleles A, a. If the frequency of dominant allele A is 0.4, then what will be the frequency of homozygous dominant, heterozygous and homozygous recessive individuals in the population?

1. 0.16 (AA); 0.36 (Aa); 0.48 (aa)
2. 0.36 (AA); 0.48 (Aa); 0.16 (aa)
3. 0.16 (AA); 0.24 (Aa); 0.36 (aa)
4. 0.16 (AA); 0.48 (Aa); 0.36 (aa)
Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law: 2 | Hardy Weinberg Law |
 64%
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NEET - 2019
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In a species, the weight of a newborn ranges from 2 to 5 kg. 97% of the newborns with an average weight between 3 to 3.3 kg survive whereas 99% of the infants born with weights from 2 to 2.5 kg or 4.5 kg to 5 kg die. Which type of selection process is taking place?

1. Cyclical selection 2. Directional selection
3. Stabilizing selection 4. Disruptive selection

Subtopic:  Natural Selection |
 66%
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NEET - 2019
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Match the hominids with their correct brain size:

Column I Column II
(a) Homo habilis  (i) 900 cc
(b) Homo neanderthalensis (ii) 1350 cc
(c) Homo erectus  (iii) 650-800 cc
(d) Homo sapiens (iv) 1400 cc

Select the correct option.

Options: (a) (b) (c) (d)
1. (iv) (iii) (i) (ii)
2. (iv) (i) (iv) (ii)
3. (iii) (ii) (i) (iv)
4. (iii) (iv) (i) (ii)
Subtopic:  Evolution Prior to Ape Man: 1 | Evolution Prior to Ape Man: 2 | Evolution Prior to Ape Man |
 71%
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NEET - 2019
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