Jurassic period of the Mesozoic era is characterized by  
1. Gymnosperms are dominant plants and first birds appears.
2. Radiation of reptiles and origin of mammal like reptiles.
3. Dinosaurs become extinct and angiosperms appears.
4. Flowering plants and first dinosaurs appear. 

Subtopic:  Concept of Speciation |
 50%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


What is common to whale, seal and shark?  

1. Homoiothermy
2. Seasonal migration
3. Thick subcutaneous fat
4. Convergent evolution

Subtopic:  Definition & Types of Evolution |
 60%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed  
1. Convergent evolution
2. Divergent evolution
3. Microevolution
4. Co-evolution 

Subtopic:  Definition & Types of Evolution |
 85%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


advertisementadvertisement

Industrial melanism as observed in peppered moths proves that:

1. Melanism is a pollution-generated feature.
2. The true black melanic forms arise from a recurring random mutation.
3. The melanic form of the moth has no selective advantage over lighter from the industrial area.
4. The lighter form of the moth has no selective advantage either in a polluted industrial area or a non-polluted area.

Subtopic:  Natural Selection |
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Adaptive radiations refers to 
1. Power of adaptation in an individual to a variety of environments.
2. Adaptations due to geographical isolation.
3. Evolution of different species from a common ancestor.
4. Migration of members of a species to different geographical areas.
 

Subtopic:  Darwin's Theory |
 55%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


The finches of Galapagos islands provide evidence in favor of 
1. Biographical evolution
2. Special creation
3. Evolution due to mutation
4. Retrogressive evolution 

Subtopic:  Darwin's Theory |
 76%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


advertisementadvertisement

One of the important consequences of geographical isolation is:

1. Random creation of new species
2. No change in the isolated fauna
3. Preventing speciation
4. Speciation through reproductive isolation

Subtopic:  Concept of Speciation |
 75%

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

Select the correct statement from the following: 

1. Mutations are random and directional.
2. Darwinian variations are small and directionless.
3. Fitness is the end result of the ability to adapt and get selected by nature.
4. All mammals except whales and camels have seven cervical vertebrae.

Subtopic:  Darwin's Theory |
 79%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


Amongst the human ancestors the brain size was more than 1000 cc in 
1. Homo habilis
2. Homo neanderthalensis
3. Homo erectus
4. Ramapithecus

Subtopic:  Introduction to Human Evolution |
 81%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.


advertisementadvertisement

The concept of chemical evolution is based on:

1. Possible origin of life by a combination of chemicals under suitable environmental conditions.
2. Crystallization of chemicals
3. Interaction of water, air, and clay under intense heat
4. Effect of solar radiation on chemicals 

Subtopic:  Examples of Chemical Evolution |
 88%
From NCERT

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.

Hints

To unlock all the explanations of 38 chapters you need to be enrolled in MasterClass Course.