Advertisements
Advertisements
प्रश्न
State the connecting links between Peripatus with Annelida and Arthopoda.
उत्तर
Connecting links between Peripatus and Annelida:
- Segmental nephridia
- Thin cuticle
- Parapodia-like appendages
Connecting links between Peripatus and Arthropoda:
- Trachea
- Open circulation
APPEARS IN
संबंधित प्रश्न
(a) Select the analogous structures from the combination given below:
(i) Forelimbs of whales and bats
(ii) Eyes of octopus and mammals
(iii) Tuber of sweet potato and potato
(iv) Tuber of Bougainvillea and tendrils of Cucurbita
(b) State the kind of evolution they represent
Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
An example of homologous organs is
Attempt giving a clear definition of the term species.
Enlist any four sequential evolutionary names of human ancestors.
Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.
How do homologous organs help in providing evidence for organic evolution?
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?
Name two animals having homologous organs and two having analogous organs. Name these 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?
The organs P and Q of two animals have different structures but similar functions. On the other hand, the two organs R and S of two other animals have the same basic structure but different functions.
(a) What are the organs like P and Q known as?
(b) Name the organs like P and Q. Also name the animals which have such organs.
(c) What are the organs like R and S called?
(d) Name the organs like R and S. Also name the animals which have such organs.
What do we call the degenerated or partially developed useless organs in living organisms? Enlist such organs in human body? How the same organs are useful in other animals?
Write short notes based upon the information known to you.
Connecting link
_______ is a connecting link between Annelida and Arthropoda.
The most common types of fossils are ------------------------.
Very short answer question:
What is vestigeal organ?
Find an odd one out.
Name the parts shown in the diagram.
Human jaw
Define the evidence of evolution shown in the figure.
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.
Write the answers to the questions by observing the figure below.
 |
 |
 |
| (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.
Why do all the gametes formed in human females have an X chromosome?
Basic principles of embryonic development were pronounced by:
Flippers of Penguins and Dolphins are examples of:
Which of the following is used as an atmospheric pollution indicator?
What were the characteristics of life forms that had been fossilised?
Give an example for convergent evolution and identify the features towards which they are converging.
While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.
Complete the following chart:
I am the connecting link of annelida and arthropoda. What is my name?
What is the function of the appendix of our digestive system?
Find the odd one out:
Explain natural selection with the example of industrial melanism.
Evolutionary convergence is the development of a ______.
Industrial melanism was highlighted by ______.
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
Pick the odd man out:
