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Question
I am a connecting link between reptiles and mammals. Who am I?
Solution
Duck-billed platypus
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RELATED QUESTIONS
What are vestigial organs?
Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution?
Four students P, Q, R and S differently reported the following set of organs to be analogous :
P. Forelimb of a frog and forelimb of a lizard
Q. Forelimb of a bird and forelimb of a human
R. Wings of a parrot and wings of a butterfly
S. Wings of a bird and wings of a bat
The two students who have reported correctly are :
(A) P and Q
(B) Q and R
(C) R and S
(D) P and S
Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.
Attempt giving a clear definition of the term species.
Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.
Differentiate between analogous and homologous structures.
Wing of an insect and forelimb of a bird are :
(a) analogous organs
(b) analeptic organs
(c) homologous
(d) homophobic organs
The presence of which of the following types of organs in two organisms indicates that they are derived from the same ancestor?
(a) analogous organs
(b) respiratory organs
(c) digestive organs
(d) homologous organs
Vestigial organ ______ present in human body is proof of evolution.
Write short notes based upon the information known to you.
Embryology
Write short notes based upon the information known to you.
Connecting link
Complete the following chart:
What do you mean by vestigial structures? Name four vestigial organs found in man.
Answer the following question:
What are homologous structures? Give an example. Is it necessary that homologous structures always have a common ancestor? Justify your answer.
Very short answer question.
What are homologous organs?
_____________ is a vestigial organ in human beings.
Find an odd one out.
Write a short note:
Embryological evidences
A human hand, a front leg of a cat, a front flipper of a whale and a bat’s wing look dissimilar and adapted for different functions. What is the name given to these organs?
Select the CORRECT match.
The fossil remains of Archaeopteryx is a connecting link between ______
- Define vestigial organs.
- Write names of any two vestigial organs in the human body.
- Write name of those animals in which these vestigial organs are functional.
Evolution has exhibited a greater stability of molecular structure when compared with morphological structures. Comment on the statement and justify your opinion.
Evolutionary convergence is the development of:
Flippers of Penguins and Dolphins are examples of:
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, because ______.
What are we referring to? When we say 'simple organisms' or 'complex organisms'.
How do we compute the age of a fossil?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Give a scientific reason.
Morphological evidences suggest that dog, sheep and wolf have a common origin.
What is the function of the appendix of our digestive system?
Find odd one out:
Pick the odd man out:
Write names of some vestigial organs in the human body.
