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प्रश्न
Write a short note:
Embryological evidences
उत्तर
- Embryological evidences arise from comparative study of embryological developmental stages of various vertebrates.
- Embryos of different vertebrates appear similar during the initial stages of development and these similarities gradually decrease as the embryo develops.
- Embryology can be used as evidence of evolution as similarities in initial stages of development indicate common origin of the animals.
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
How do homologous organs help in providing evidence for organic evolution?
The presence of which of the following types of organs in two organisms indicates that they are derived from the same ancestor?
(a) analogous organs
(b) respiratory organs
(c) digestive organs
(d) homologous organs
One pair of organs in the following animals are not homologous. This is :
(a) forelimbs in humans and lizard
(b) forelimbs in lizard and frog
(c) wings in butterfly and bat
(d) wings in bat and bird
The wings of a housefly and the wings of a sparrow are an example of :
(a) analogous organs
(b) vestigial organs
(c) respiratory organs
(d) homologous organs
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
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
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
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
Explain any three molecular (genetic) evidences in favour of organic evolution.
Long answer question.
Would you consider wings of butterfly and bat as homologous or analogous and why?
Find an odd one out.
I am a connecting link between reptiles and mammals. Who am I?
Appendix : vestigial organ : : Peripatus : ____________
Give scientific reason.
Peripatus is said to be the connecting link between Annelida and Arthropoda.
Give scientific reason.
Vertebrates have slowly originated from invertebrates.
Complete the flowchart.
Define the evidence of evolution shown in the figure.
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?
- 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.
Homologous organs are:
Tendons and ligaments are examples of ______.
The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.
Which of the following is used as an atmospheric pollution indicator?
Appearance of antibiotic-resistant bacteria is an example of ______.
Did aquatic life forms get fossilised? If, yes where do we come across such fossils?
Find odd one out:
Find the odd one out:
Explain natural selection with the example of industrial melanism.
Industrial melanism was highlighted by ______.
Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?
Give examples of homologous organs and analogous organs in plants.
Pick the odd man out:
