Draw a Labelled Diagram of T.S. of a Leaf Showing Kranz Anatomy. - Biology


Draw a labelled diagram of T.S. of a leaf showing Kranz anatomy. 



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2013-2014 (October) Set 1


State the connecting links between Peripatus with Annelida and Arthopoda.

What are vestigial organs?

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

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

Write the similarity between the wing of a butterfly and the wing of a bat. What do you infer from the above with reference to evolution? 

State a reason for the increased population of dark coloured moths coinciding with the loss of lichens (on tree barks) during industrialization period in England.

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

Four students P, Q, R and S differently reported the following set of organs to be analogous :

P. Forelimb of a frog and forelimb of a lizard

Q. Forelimb of a bird and forelimb of a human

R. Wings of a parrot and wings of a butterfly

S. Wings of a bird and wings of a bat

The two students who have reported correctly are :

(A) P and Q

(B) Q and R

(C) R and S

(D) P and S

 An example of homologous organs is

 Explain the terms analogous and homologous organs with examples.

Try to trace the various components of human evolution (hint: brain size and function, skeletal structure, dietary preference, etc.)

Give the importance of fossil in support of organic evolution

Name the scientists who Discovered the fossil of Australopithecus

Explain the evolution of giraffe's neck according to Lamarck's theory of evolution.

Name any two temporary embryonic structures in vertebrates which provide evidence for evolution.

What are homologous organs?

How do homologous organs help in providing evidence for organic evolution?

Human tailbone is a vestigial organ. Explain.

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 organisms indicates that they are derived from the same ancestor?
(a) analogous organs
(b) respiratory organs
(c) digestive organs
(d) homologous organs

 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

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.

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

Write short notes based upon the information known to you.


Write short notes based upon the information known to you.

Connecting link

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 : ....................

_______ is a connecting link between Annelida and Arthropoda.

With the help of diagrams, describe emasculation and bagging. 

The most common types of fossils are ------------------------. 

What do you mean by vestigial structures? Name four vestigial organs found in man.

Choose the correct option of the following question:

Wings of Insect and Birds are examples of :

Explain any three molecular (genetic) evidences in favour of organic evolution.

Define fossils. 

Differentiate between connecting links and the missing links.

Define phylogeny.

Short answer question.

Give the significance of fossils.

Similarities in the initial stages indicate the _______ evidence.

_____________ is a vestigial organ in human beings.

Find an odd one out.

Find an odd one out.

I am a connecting link between reptiles and mammals. Who am I?

Match the following.

Column A Column B
1) Morphological evidences a) Tail-bone or wisdom teeth
2) Paleontological evidences b) Leaf venation
  c) Fossils

Give scientific reason.

Vertebrates have slowly originated from invertebrates.

Write a short note:

Embryological evidences

Complete the flowchart.

What is carbon dating?

Which evidence of evolution is shown in the given picture? Explain the importance of this evidence.

Observe the following images and answer the questions.

  1. Which evolutionary evidences are indicated in the given picture?
  2. How are they formed?
  3. Which method is used to measure their age or their time?

Explain any five types of evidence that support the theory of evolution.

Biogenetic law states that ______.

The degenerated and non-functional organs found in an organism are called ______.

A human hand, a front leg of a cat, a front flipper of a whale and a bat’s wing look dissimilar and adapted for different functions. What is the name given to these organs?

How do you differentiate homologous organs from analogous organs?

Select vestigial organs from the following.

Homologous organs and vestigial organs are examples of ______ type of evidence in evolution.

Select the correct statement.

Select the CORRECT match.

Select the CORRECT set of homologous organs.

Define vestigial organs

Why do all the gametes formed in human females have an X chromosome?

Homologous organs are:

Cucurbits do not develop thick and woody stem as they are:

Tendons and ligaments are examples of ______.

Palaeontological evidence for evolution refers to the ______.

Basic principles of embryonic development were pronounced by:

Study of fossils is ______.

Evolutionary convergence is the development of:

The process of mating of individuals, which are more closing related than the average of the population to which they belong is called ______.

The presence of gill slits, in the embryos of all vertebrates, supports the theory of ______.

Which is not a vestigial organ in a man?

Flippers of Penguins and Dolphins are examples of: 

The study of fossil evidence of evolution is called ______

Organs having similar functions but different origin and development are known as:

Analogous organs arise due to ______.

What were the characteristics of life forms that had been fossilised?

The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.

Explain divergent evolution in detail. What is the driving force behind it?

I am the connecting link of annelida and arthropoda. What is my name?

Give a scientific reason.

Morphological evidences suggest that dog, sheep and wolf have a common origin.

As shown in figure below some organisms that share a common ancestor have features that have different functions, but similar structures.

These are known as ______. Give example.

Explain natural selection with the example of industrial melanism.

Evolutionary convergence is the development of a ______.

Write avian characters of Archaeopteryx.

Write a note on the significance of Palaeontology.

Define the term:

Homologous organs

Industrial melanism was highlighted by ______.

Industrial melanism in England after 1850 is an excellent example of Natural selection. Explain how?

Complete the following conceptual picture:

Give a definition of Palaeontology.


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