Advertisements
Advertisements
प्रश्न
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.
उत्तर
- It is believed chordates have originated from invertebrates.
- It is difficult to find out from which invertebrate group the chordates were developed.
- Chordate ancestors were soft bodied animals, hence they were not preserved as fossils.
- Thus, there is evidence of fatal science among chordates.
APPEARS IN
संबंधित प्रश्न
What are vestigial organs?
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
State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on tree barks) during industrialization period in England.
Which of the following is a correct set of homologous organs?
(a) Forelimbs of frog, bird and lizard
(b) Spine of cactus and thorn of bougainvillea
(c) Wings of bat and wings of butterfly
(d) Wings of a bird and wings of a bat
Which one of the following pairs of vegetables is an example of homologous structures?
(A) Potato and sweet potato
(B) Carrot and radish
(C) Carrot and tomato
(D) Tomato and radish
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.
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Fossils
Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.
Human tailbone is a vestigial organ. Explain.
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?
Out of bacteria, spider, fish and chimpanzee, which organism has a better body design in evolutionary terms? Give reason for your answer.
The organs which perform different functions but have the same basic structure are known as :
(a) homologous organs
(b) analogous organs
(c) homolytic organs
(d) analytic organs
Select a set of homologous organs from the following:
(A) Wings of a bat and wings of a butterfly
(B) Wings of a pigeon and wings of a bat
(C) Wings of a butterfly and wings of a pigeon
(D) Forelimbs of a duck, forelimbs of a cow and forelimbs of a lizard
You have potato, carrot, radish, sweet potato, tomato and ginger bought from the market in your jute bag. Identify two vegetables to represent the correct homologous structures.
(A) Potato and tomato
(B) Carrot and tomato
(C) Potato and sweet potato
(D) Carrot and radish
Write short notes based upon the information known to you.
Connecting link
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy.
Very short answer question.
What are homologous organs?
Explain the importance of Anatomical evidences with examples.
Find an odd one out.
I am a connecting link between reptiles and mammals. Who am I?
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
What is carbon dating?
Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.
Which of these is not a vestigial organ in human beings?
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.
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
The study of fossil evidence of evolution is called ______
Analogous organs arise due to ______.
Did aquatic life forms get fossilised? If, yes where do we come across such fossils?
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
Explain divergent evolution in detail. What is the driving force behind it?
Complete the following diagram:
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.
Pick the odd man out:
Write names of some vestigial organs in the human body.
