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प्रश्न
Write short notes based upon the information known to you.
Embryology
उत्तर
Embryology: Embryology is the study of the formation and development of embryo and foetus. Embryology is used as one of the evidences of evolution. Comparative study of embryos in vertebrates shows that there is lot of similarity in them at the initial stages whereas this similarity decreases gradually. This similarity in the development of embryos represents common origin of organisms.
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संबंधित प्रश्न
Mammals : _________ : : Amphibia : Fishes
Give two examples of vestigial organs in human beings and plants.
(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
“Two areas of study namely 'evolution' and 'classification' are interlinked'. Justify this statement.
Can the wing of a butterfly and the wing of a bat be considered homologous organs? Why or why not?
Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution.
Name the scientists who Discovered the fossil of Australopithecus
How do homologous organs help in providing evidence for organic evolution?
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.
The organs which perform different functions but have the same basic structure are known as :
(a) homologous organs
(b) analogous organs
(c) homolytic organs
(d) analytic organs
Some dinosaurs had feathers although they could not fly birds have feathers that help them to fly. In the context of evolution, this means that ______
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
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
Identify the following pairs as homologous and analogous organs:
(i) Sweet potato and potato
(ii) Eye of octopus and eye of mammals
(iii) Thorns of Bougainvillaea and tendrils of Cucurbits
(iv) Fore limbs of bat and whale
Read the following statement and justify same in your own words with the help of suitable example.
There is evidences of fatal science among chordates.
Vestigial organ ______ present in human body is proof of evolution.
Write the names of those animals in whom the human body organs are functioning.
Observe the picture and answer the following questions.
A) Which evidence of evolution is shown in the picture?
B) What can be proven with this proof?
C) Give one more example of evidence of evolution
Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................
“Appearance of melanised moths post-industrialisation in England is a classic example of evolution by natural selection.” Explain.
What do you mean by vestigial structures? Name four vestigial organs found in man.
Find an odd one out.
I am a connecting link between reptiles and mammals. Who am I?
Give scientific reason.
Duck-billed platypus shows relationship with mammals.
Enlist the evidences of evolution.
Define the evidence of evolution shown in the figure.
What is carbon dating?
Explain any five types of evidence that support the theory of evolution.
Select the correct statement.
Where is carbon dating used?
Cucurbits do not develop thick and woody stem as they are:
Flippers of Penguins and Dolphins are examples of:
Appearance of antibiotic-resistant bacteria is an example of ______.
How do we compute the age of a fossil?
While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.
The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.
What is the function of the appendix of our digestive system?
