Which of the following statements is incorrect regarding an evolutionary trend?

1.  It is the continuous change of a character within an evolving lineage.
2.  The number of trends in any lineage is the same as the number of characters evolving.
3.  A trend may be progressive or retrogressive.
4.  Direction and speed of evolutionary trends in a lineage are universal throughout the family and are not subject to variations.

Subtopic:  Modern Theory of Evolution |
 70%

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

Hints

Stabilizing selection acts to _________ in a species' population.
1. elaborate new traits
2. alter traits
3. push for directional change
4. maintain a certain phenotype

Subtopic:  Modern Theory of Evolution | Natural Selection |
 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.


Given below is the representative evolutionary history of vertebrates through geological periods. A, B, C, and D, respectively, are:
  

1.  Dinosaurs, Thecodonts, Therapsids, and Pelycousurs
2.  Dinosaurs, Therapsids, Thecodonts, and Pelycosaurs
3.  Pelycosaurs, Therapsids, Thecodonts, and Dinosaurs
4.  Theraosids, Dinosaurs, Pelycosaurs, and Thecodonts
Subtopic:  Modern Theory of Evolution |
 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

The bones of forelimbs of whales, bats, cheetahs, and men are similar in structure, because:

1.  one organism has given rise to another
2.  they share a common ancestor
3.  they perform the same function
4.  they have biochemical similarities

Subtopic:  Modern Theory of Evolution | Concept of Speciation |
 89%
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.