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प्रश्न
Find an odd one out.
विकल्प
Leaf venation
Size of seeds
Leaf petiole
Leaf shape
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उत्तर
Size of seeds
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संबंधित प्रश्न
Differentiate between homology and analogy. Give one example of each.
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
If you are asked to select a group of two vegetables, out of the following, having homologous structures which one would you select?
(a) Carrot and radish
(b) Potato and sweet potato
(c) Potato and tomato
(d) Lady finger and potato
Four students A, B, C and D reported the following set of organs to be homologous. Who is correct ?
(A) Wings of a bat and a butterfly
(B) Wings of a pigeon and a bat
(C) Wings of a pigeon and a butterfly
(D) Forelimbs of cow, a duck and a lizard
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 presence of which of the following types of organs in two animals indicates that they are not derived from a common ancestor?
(a) homologous organs
(b) excretory organs
(c) analogous organs
(d) reproductive organs
Write the names of those animals in whom some vestigial organs in human body are functioning.
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
Find an odd one out.
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
Define the evidence of evolution shown in the figure.
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
The fossil remains of Archaeopteryx is a connecting link between ______
Why do all the gametes formed in human females have an X chromosome?
Homologous organs are:
The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.
Appearance of antibiotic-resistant bacteria is an example of ______.
Complete the following conceptual picture:
