Natural Selection

Q.

What are the factors leading to speciation? How do these factors lead to speciation?

Q.

What are the advantages of classifications of organisms?

Q.

What are the 3 conditions for natural selection?

Q. List four causes of speciation and which of these can't be a major factor in the speciation of a self pollinating plant species? Explain briefly

Q.

What are Darwins 5 Points of natural selection?

Q.

Industrial melanism provides a good example of natural selection. Discuss.

Q. What are the features of Mongoloids?

1. Thick lips
2. Reddish Skin
3. Straight hair
4. Woolly hairs

Q.

Are natural selection and descent with modification the same?

Q.

What is the name of a famous book written by Charles Darwin?

Q.

How does population of peppered moth change during industrial revolution?

Q.

Only variations that confer an advantage to an individual organism will survive in a population. Do you agree with this statement? Why or why not?

Q. Which of the following is NOT a direct conclusion to be drawn from Mendel's experiments?

1. Only one parental trait is expressed.
2. Two copies of each trait are inherited in sexually reproducing organsisms.
3. For recessive trait to be expressed, both copies should be identical.
4. Natural selection can alter the frequencies of an inherited trait.

Q.

Would natural selection work on a population that has no variation?

Q. Give examples on why variations are necessary for survival

Q. Question 37
Does geographical isolation of individuals of a species lead to the formation of new species? Provide a suitable explanation.

Q. Polar bears are white in colour because it refracts white light, but many years ago bear was brown in colour, then how the bear was brown that time but white in colour now?

Q. Match the following and select the correct option :

(a) Earthworm (i) Pioneer species
(b) Succession (ii) Detritivore
(c) Ecosystem service (iii) Natality
(d) Population growth (iv) Pollination

1. a - (i) b - (ii) c - (iii) d - (iv)
2. a - (iv) b - (i) c - (iii) d - (ii)
3. a - (iii) b - (ii) c - (iv) d - (i)
4. a - (ii) b - (i) c - (iv) d - (ii)

Q.

Are humans influencing the process of evolution?

Q. The figure below depicts a situation where a rare variation has become common. The green coloured beetle population has become common because it gave them a survival advantage. This is an example of:

1. Artificial selection
2. Natural selection
3. Accidental selection
4. Random selection

Q. Assertion (A): Artificial selection is based on the desire of human beings.

Reason (R): The improvement of plants is possible through artificial selection.

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. A is false but R is true

Q.

Name the following:
Development of newer types of organisms from pre-existing ones.

Q.

The organism studied for Industrial melanism was a

(a) Butterfly

(b) Moth

(c) Honey bee

(d) Cockroach

Q.

Give the scientific name of the organism which is cited as the classical example of "Natural Selection".

Q.

Why are living organisms classified into groups or categories?

Q.

In evolutionary terms, which among bacteria, spiders, fish and chimpanzees have a 'better' body design? Why or why not?

Q. The transmission of characters from the parents to their offspring is called as

1. Heredity
2. Speciation
3. Natural selection
4. All of the above

Q.

How does creation of variations in a species promote survival?

Q. What are the advantages of sexual reproduction over asexual reproduction

Q.

What factors could lead to the rise of new species? [3 MARKS]

Q. Which of the following is NOT a direct conclusion to be drawn from Mendel's experiments?

1. Only one parental trait is expressed.
2. Two copies of each trait are inherited in sexually reproducing organsisms.
3. For recessive trait to be expressed, both copies should be identical.
4. Natural selection can alter the frequencies of an inherited trait.