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Question
Write the answers to the questions by observing the figure below.
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| (a) | (b) | (c) |
- Write the name of the animal ‘(a)’ in the figure.
- Write the name of the animal ‘(b)’ in the figure.
- Write the name of the animal ‘(c)’ in the figure.
- Which evolutionary evidence is illustrated by this figure?
- Write the definition of that evidence for evolution.
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Solution
- ‘(a)’ - Duck billed platypus
- ‘(b)’ - Lungfish
- ‘(c)’ - Peripatus
- The evolutionary evidence illustrated in the given figure is connecting links.
- Definition: Connecting links are some plants or animals that show morphological characters by which they can be related to two different groups of organisms.
RELATED QUESTIONS
(a) Select the homologous structures from the combinations given below:
(i) Forelimbs of whales and bats
(ii) Tuber of potato and sweet potato
(iii) Eyes of octopus and mammals
(iv) Thorns of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent.
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
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
Explain with an example for the given, how the following provides evidence in favor of evolution in organisms :
Fossils
How do homologous organs help in providing evidence for organic evolution?
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
_______ is a connecting link between Annelida and Arthropoda.
The most common types of fossils are ------------------------.
Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy.
Find an odd one out.
The decaying process of C-14 occurs continuously in dead organisms only.
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
What is carbon dating?
How do you differentiate homologous organs from analogous organs?
Cucurbits do not develop thick and woody stem as they are:
Palaeontological evidence for evolution refers to the ______.
Appearance of antibiotic-resistant bacteria is an example of ______.
What were the characteristics of life forms that had been fossilised?
Find the odd one out:
Write avian characters of Archaeopteryx.
