Advertisements
Advertisements
Question
Read the following statement and justify same in your own words with the help of suitable example.
There is evidences of fatal science among chordates.
Advertisements
Solution
- Early embryos of fish, amphibians, reptiles, birds, and mammals have very similar structures.
- As they continue to expand, they develop new patterns.
- The earliest commonality of vertebrate embryos demonstrates that all vertebrate classes shared a common ancestor during evolution.
- This is known as embryological evidence for vertebrate evolution.
APPEARS IN
RELATED QUESTIONS
Study the following statements:-
I. Wings of birds and wings of bats are homologous organs.
II. Wings of birds and wings of insects are modified forelimbs.
III. Wings of birds and wings of insects are analogous organs.
IV. Wings of birds and forelimbs of horse are homologous organs.
The correct statements are
(A) I and II
(B) II and III
(C) III and IV
(D) I and IV
“Two areas of study namely 'evolution' and 'classification' are interlinked'. Justify this statement.
Differentiate between analogy and homology giving one example each of plant and animal respectively.
An example of homologous organs is
Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.
Enlist any four sequential evolutionary names of human ancestors.
The forelimbs of a frog, a bird and a man show the same basic design (or basic structure) of bones. What name is given to such organs?
Name two animals having homologous organs and two having analogous organs. Name these organs.
X, Y, and Z are three animals. The animal X can fly but animal Y can only run on ground or walls. The forelimbs of animals X and Y have the same basic design but they are used for different purposes such as flying and running respectively. The animal Z became extinct an long time ago. The study of fossils of Z tells us that it had some features like those of X and some like those of Y. In fact, Z is said to form a connecting link in the evolutionary chain of X and Y.
(a) What could the animals X, Y and Z be?
(b) What name is given to the forelimbs like those of X and Y which have the same basic design but different functions?
(c) Name one feature in which Z resembled X.
(d) Name one feature in which Z resembled Y.
(e) Which is the correct evolutionary chain involving X, Y and Z : X → Z → Y or Y → Z → X?
Explain with suitable examples importance of anatomical evidence in evolution.
Choose the correct option of the following question:
Wings of Insect and Birds are examples of :
Define phylogeny.
What are homologous structures?
Long answer question.
Would you consider wings of butterfly and bat as homologous or analogous and why?
Similarities in the initial stages indicate the _______ evidence.
Find an odd one out.
I am a connecting link between reptiles and mammals. Who am I?
Appendix : vestigial organ : : Peripatus : ____________
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
Select the correct statement.
Which of these is not a vestigial organ in human beings?
Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.
Homologous organs are:
The study of fossil evidence of evolution is called ______
How do we compute the age of a living tree?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Complete the following chart:
What is the function of the appendix of our digestive system?
As shown in figure below some organisms that share a common ancestor have features that have different functions, but similar structures.
These are known as ______. Give example.
Write down the difference between homologous and analogous organs.
Evolutionary convergence is the development of a ______.
Write a note on the significance of Palaeontology.
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
Complete the following conceptual picture:
