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प्रश्न
State the connecting links between Peripatus with Annelida and Arthopoda.
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उत्तर
Connecting links between Peripatus and Annelida:
- Segmental nephridia
- Thin cuticle
- Parapodia-like appendages
Connecting links between Peripatus and Arthropoda:
- Trachea
- Open circulation
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संबंधित प्रश्न
Mammals : _________ : : Amphibia : Fishes
Differentiate between homology and analogy. Give one example of each.
(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.
Given below is the list of vegetables available in the market. Select from these the two vegetables having homologous structures:
Potato, sweet potato, ginger, radish, tomato, carrot, okra (Lady’s finger)
(A) Potato and sweet potato
(B) Radish and carrot
(C) Okra and sweet potato
(D) Potato and tomato
Select two pairs from the following which exhibit divergent evolution. Give reasons for your answer.
(i) Forelimbs of cheetah and mammals
(ii) Flippers of dolphins and penguins
(iii) Wings of butterflies and birds
(iv) Forelimbs of whales and mammals
Differentiate between analogous and homologous structures.
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.
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?
In a class, students were asked to observe the models/slides/pictures of the skeletons of forelimbs and wings of different organisms. After the observations the students made the following groups of homologous structures. Select the correct group :
(A) Wings of a bird and a butterfly
(B) Wings of a pigeon and a bat
(C) Wings of a butterfly and a bat
(D) Forelimbs of a cow, a duck and a lizard
Write the names of those animals in whom some vestigial organs in human body are functioning.
Explain with suitable examples importance of anatomical evidence in evolution.
With the help of diagrams, describe emasculation and bagging.
What are homologous structures?
______ is a vestigial organ in human beings.
Find an odd one out.
Find an odd one out.
The decaying process of C-14 occurs continuously in dead organisms only.
Define the evidence of evolution shown in the figure.
What is carbon dating?
Observe the given images and answer the following questions.
- Which evolutionary evidence does it indicate?
- What does it prove?
- State another example of evolutionary evidence.
Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.
Observe the following images and answer the questions.
- Which evolutionary evidences are indicated in the given picture?
- How are they formed?
- Which method is used to measure their age or their time?
Select the correct statement.
Which of these is not a vestigial organ in human beings?
The fossil remains of Archaeopteryx is a connecting link between ______
Homologous organs are:
Cucurbits do not develop thick and woody stem as they are:
The study of fossil evidence of evolution is called ______
Organs having similar functions but different origin and development are known as:
Did aquatic life forms get fossilised? If, yes where do we come across such fossils?
What are we referring to? When we say 'simple organisms' or 'complex organisms'.
How do we compute the age of a rock?
Explain divergent evolution in detail. What is the driving force behind it?
Complete the following chart:
Give a scientific reason.
Morphological evidences suggest that dog, sheep and wolf have a common origin.
Find odd one out:
Complete the following conceptual picture:
