CBSE Class 10 Science Heredity and Evolution MCQs Set 05

Question. A Mendelian experiment consisted of breeding tall pea plants bearing violet flowers with short pea plants bearing white flowers. The progeny all bore violet flowers, but almost half of them were short. This suggests that the genetic make-up of the tall parent can be depicted as           
(a) TTWW
(b) TTww
(c) TtWW
(d) TtWw

Answer: C

Question. With whom we associate theory of evolution?         
(a) Charles Darwin
(b) Mendel
(c) Stanley Miller
(d) Harold Urey

Answer: A

Question. Who have a perfect pair of sex chromosomes?           
(a) Girls only
(b) Boys only
(c) Both girls and boys
(d) It depends on many other factors

Answer: A

Question. If we breed a group of squirrels and surgically remove their tails, then amongst the progeny of these tailless squirrels–       
(a) All have no tail
(b) All have a tail
(c) Some of them have tails
(d) Cannot be determined.

Answer: B

Question. Which one of the following gives a survival advantage and thus alters frequency of inherited trait.       
(i) natural selection
(ii) genetic drift
(a) only (i)
(b) only (ii)
(c) both (i) and (ii)
(d) none of the options

Answer: A

Question. Wild cabbage is being cultivated for thousands of years and humans have generated broccoli, cauliflower, kala etc. from it. This is an example of             
(a) Natural selection
(b) Genetic drift
(c) Geographic isolation
(d) Artificial selection

Answer: D

Question. Which one of the following is not one of the direct conclusions that can be drawm from Mendel’s experiment?           
(a) Only one parental trait is expressed
(b) Two copies of each trait is inherited in sexually reproducing orgainsm
(c) For recessive trait to be expressed, both copies should be identical.
(d) Natural selection can alter frequency of an inherited trait.

Answer: D

Question. Which of the following is controlled by genes?         
(i) Weight of a person
(ii) Height of a person
(a) only 1 (i)
(b) only (ii)
(c) both (i) and (ii)
(d) Sometimes (i) and sometimes (ii)

Answer: B

Question. What is the probability that a human progeny will be a boy?             
(a) 50%
(b) 56%
(c) 47.34%
(d) It varies

Answer: A

Question. A section of DNA providing information for one protein is called—         
(a) Nucleus
(b) Chromosomes
(c) Trait
(d) Gene

Answer: D

Question. Which one of the following is present in the nucleus?             
(a) Gene
(b) DNA
(c) Chromosomes
(d) All of the options

Answer: D

Question. Formation of 2 independent species due to genetic drift, geographical isolation, natural selection is specifically referred as–         
(a) Evolution
(b) Classification
(c) Speciation
(d) Reproduction

Answer: C

Question. Homologous organs have             
(a) Same structure, same function
(b) Different structure, different function
(c) Same structure, different function
(d) Same function, different structure

Answer: C

Question. Amongst which of the following animals, sex of the offsprings not genetically determined?   
(a) Humans
(b) Snails
(c) Birds
(d) Dogs

Answer: B

Question. Organism A recently came into existence while B was formed millions of years ago. What does this indicate?           
(i) A is more efficient than B
(ii) A is more complex than B
(a) Only (i)
(b) Only (ii)
(c) Both (i) and (ii)
(d) Either (i) or (ii)

Answer: C

Question. Analogous organs have         
(a) Same structure, same function
(b) Different structure, different function
(c) Same structure, different function
(d) Same function, different structure

Answer: D

Question. Which of the following is a totally impossible outcome of Mendel’s Experiment (cross breeding pure bred tall and short pea plants)           
(a) 3 tall 1 short plant
(b) 24 tall and 8 short plants
(c) 8 tall and 0 short plants
(d) 4 tall plants and 1 medium-height plant.

Answer: D

Question. Which one of the following strongly indicates that bird and dinosaurs are closely related?     
(a) They both have feathers
(b) They both respire
(c) They both reproduce
(d) They both have eyes

Answer: A

Question. Fossils helps           
(a) To study evolution
(b) To understand climatic conditions in past
(c) For a hierarchy of organisms (classification)
(d) They help in all the above

Answer: D

Question. How can we know how old fossils are:             
(a) Fossils found closer to surface are recent than those found much below
(b) Detecting ratios of isotopes
(c) Studying its characteristics
(d) All of the options

Answer: D

Question. There is an inbuilt tendency of variation during reproduction because of–             
(i) Errors in DNA copying
(ii) Sexual reproduction
(a) only (i)
(b) only (ii)
(c) both (i) and (ii)
(d) none of the options

Answer: B

Question. Which of the following can be called a characteristic?           
(a) Plants can photosynthesise
(b) We have 2 eyes
(c) Mango tree is multicellular
(d) All of the options

Answer: D

Question. An example of homologous organs is       
(a) our arm and a dog’s fore-leg.
(b) our teeth and an elephant’s tusks.
(c) potato and runners of grass.
(d) all of the options

Answer: D

Question. In evolutionary terms, we have more in common with           
(a) a Chinese school-boy.
(b) a chimpanzee.
(c) a spider.
(d) a bacterium.

Answer: A

Question. If A and B have n characteristics common while A and C have n/2 characteristics common, then which of the two organisms are more closely related?
(a) A and C
(b) A and B
(c) Characteristics need to be known
(d) None of the options

Answer: C