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Science M.C.Q

heredity and evolution · Gujarat Board (GSEB) STD 10 (GSEB - English Medium). 42 questions.

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42 questions · timed · auto-graded

MCQ 11 Mark
In order to obtain virtual image of half size using a convex mirror of focal length $10 \ cm$, object should be placed at $..........$ distance from the mirror.
  • A
    $10 \ cm$
  • B
    $20 \ cm$
  • C
    $40 \ cm$
  • ✓
    $5 \ cm$
Answer
Correct option: D.
$5 \ cm$
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MCQ 21 Mark
When light rays emanating are made incident on $..........$ parallel light beam can be obtained.
  • ✓
    concave mirror and convex lens.
  • B
    convex mirror and concave lens.
  • C
    two plane mirrors placed at $90^\circ $ angle.
  • D
    concave mirror and concave lens.
Answer
Correct option: A.
concave mirror and convex lens.
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MCQ 31 Mark
Value of magnification of image obtained in the rear view mirror fitted in the vehicles is $..........$
  • ✓
    less than $1$
  • B
    more than $1$
  • C
    equal to $1$
  • D
    less than $1$ or more than $1$ , depending upon the position of object
Answer
Correct option: A.
less than $1$
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MCQ 41 Mark
Value of magnification of image obtained in the rear view mirror fitted in the vehicles is $..........$
  • ✓
    less than $1$
  • B
    more than $1$
  • C
    equal to $1$
  • D
    less than $1$ or more than $1$ , depending upon the position of object
Answer
Correct option: A.
less than $1$
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MCQ 51 Mark
As shown in the figure, light beams enter the box through holes $A$ and $B$ which come out of box from $C$ and $D$. Then what must have been present in the box?
Image
  • ✓
    rectangular glass box
  • B
    convex lens
  • C
    concave lens
  • D
    prism
Answer
Correct option: A.
rectangular glass box
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MCQ 61 Mark
Which one of the following materials can not be used to make a lens ?
  • ✓
    Clay
  • B
    Water
  • C
    Glass
  • D
    Plastic
Answer
Correct option: A.
Clay
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MCQ 71 Mark
Find mismatched pair.
  • ✓
    Gene flow $-$ Bound to happen between population of two different species.
  • B
    Genetic drift $-$ Frequency of certain genes in a population changed over generation.
  • C
    Genetical variation $-$ Inherited trait
  • D
    Gene – An informative section of $\text{DNA}$ for protein
Answer
Correct option: A.
Gene flow $-$ Bound to happen between population of two different species.
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MCQ 81 Mark
Statement $A :$ Fossils are considered as ancient documents. Reason $R :$ Genetic footprints of Homo sapiens can be traced with the help of fossils. Which is correct option for Statement $A$ and Reason $R?$
  • ✓
    Both $A$ and $R$ correct, $R$ is explanation of $A.$
  • B
    Both $A$ and $R$ correct but $R$ is not explanation of $A.$
  • C
    $A$ is correct, $R$ is incorrect.
  • D
    $A$ is incorrect, $R$ is correct.
Answer
Correct option: A.
Both $A$ and $R$ correct, $R$ is explanation of $A.$
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MCQ 91 Mark
A snail can change its sex. What does it indicate?
  • ✓
    The sex determination therein is not a genetic phenomenon.
  • B
    It is bisexual.
  • C
    It is sterile.
  • D
    Some of the chromosomes in its zygote differentiate into $Y-$chromosomes.
Answer
Correct option: A.
The sex determination therein is not a genetic phenomenon.
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MCQ 101 Mark
Which of the following statement is true for variation in organisms? $(1)$ The occurrence of differences among the individuals of the same species is known as variation. $(2)$ Variations decrease the possibilities of survival. $(3)$ The process of evolution decreases the variation in organisms. $(4)$ During meiosis, crossing over takes place between the genes and hence, new combinations are formed, which ultimately results in producing variations.
  • A
    $(1)$ and $(3)$
  • ✓
    $(1)$ and $(4)$
  • C
    $(2)$ and $(4)$
  • D
    $(2)$ and $(1)$
Answer
Correct option: B.
$(1)$ and $(4)$
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MCQ 111 Mark
Hybridazation experiment performed by Mendel between a tall $(TT)$ plant and a dwarf $(tt)$ plant of Pisum sativum gave the following result in $F2$ generation ……….
  • A
    all plants are tall
  • ✓
    tall plants and dwarf plants in the ratio $3 : 1$
  • C
    tall plants and dwarf plants in the ratio $1 : 1$
  • D
    tall plants and dwarf plants in the ratio $2 : 1$
Answer
Correct option: B.
tall plants and dwarf plants in the ratio $3 : 1$
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MCQ 121 Mark
For what purpose is the Carbon Dating system used?
  • A
    To determine constitution of the layer of earth.
  • ✓
    To estimate the age of fossils.
  • C
    To determine the constitution of fossils.
  • D
    To utilize the artificial selection.
Answer
Correct option: B.
To estimate the age of fossils.
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MCQ 131 Mark
Which of the following is not an acquired characteristic?
  • A
    To learn swimming by man
  • B
    To have a scar of wound on the human face
  • C
    To role on the skatting ring with the skates on
  • ✓
    To have attached earlobe (of the pinna)
Answer
Correct option: D.
To have attached earlobe (of the pinna)
D. To have attached earlobe (of the pinna)
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MCQ 141 Mark
Which is the befitting statement for the acquired characteristic?
  • A
    It comes into existence due to changes in DNA.
  • B
    It is transmitted in the offspring through the parental gametes.
  • C
    The organisms are born with these characteristics.
  • ✓
    It develops as a response to the environment.
Answer
Correct option: D.
It develops as a response to the environment.
D. It develops as a response to the environment.
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MCQ 151 Mark
The characteristic that develops as a response to environment ……...
  • A
    is hereditary characteristic.
  • B
    is important for evolution.
  • ✓
    is not hereditary.
  • D
    descends in the offsprings.
Answer
Correct option: C.
is not hereditary.
C. is not hereditary.
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MCQ 161 Mark
Amongst Planaria, Insect, Octopus, Invertebrates and Vertebrates, the evolution of which organ can be explained stepwise?
  • A
    Ears
  • B
    Wings
  • ✓
    Eyes
  • D
    Feathers
Answer
Correct option: C.
Eyes
C. Eyes
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MCQ 171 Mark
How many pairs of sex chromosomes are found in the somatic cells of the human being?
  • ✓
    One
  • B
    Two
  • C
    Three
  • D
    Four
Answer
Correct option: A.
One
A. One
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MCQ 181 Mark
How many sex chromosomes are found in the reproductive cells (gametes) of human being?
  • ✓
    $1$
  • B
    $2$
  • C
    $23$
  • D
    $46$
Answer
Correct option: A.
$1$
$1$
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MCQ 191 Mark
Which is the function of gene?
  • A
    To form the structure of $DNA.$
  • B
    To form the structure of chromosome.
  • ✓
    To bring about the synthesize of protein.
  • D
    To synthesize $DNA.$
Answer
Correct option: C.
To bring about the synthesize of protein.
To bring about the synthesize of protein.
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MCQ 201 Mark
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
  • ✓
    Analogous organs
  • D
    Reproductive organs
Answer
Correct option: C.
Analogous organs
C. Analogous organs
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MCQ 211 Mark
In which of the following, the new combinations of genes formed?
  • A
    Vegetative reproduction
  • B
    Asexual reproduction
  • ✓
    Sexual reproduction
  • D
    Budding
Answer
Correct option: C.
Sexual reproduction
C. Sexual reproduction
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MCQ 221 Mark
New species may be formed if : $(1) DNA$ undergoes significant changes in germ cells. $(2)$ there is no change in the genetic material. $(3)$ mating does not take place.
  • A
    $(1)$ and $(2)$
  • ✓
    $(1)$ and $(3)$
  • C
    $(2)$ and $(3)$
  • D
    $(1), (2)$ and $(3)$
Answer
Correct option: B.
$(1)$ and $(3)$
$(1)$ and $(3)$
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MCQ 231 Mark
If the fossil of an organism is found in the deeper layer of earth, then we can predict that ……...
  • A
    the extinction of organism has occurred recently.
  • ✓
    the extinction of organism has occurred thousands of years ago.
  • C
    the fossil position in the layers of earth is not related to its time of extinction.
  • D
    time of extinction cannot be determined.
Answer
Correct option: B.
the extinction of organism has occurred thousands of years ago.
B. the extinction of organism has occurred thousands of years ago.
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MCQ 241 Mark
The organs which perform different functions but have the same basic structure are known as ........
  • ✓
    Homologous organs
  • B
    Analogous organs
  • C
    Homolytic organ
  • D
    Analytic organ
Answer
Correct option: A.
Homologous organs
A. Homologous organs
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MCQ 251 Mark
Who conducted studies on role of earthworms in soil fertility?
  • A
    Mendel
  • B
    Miller
  • C
    Urey
  • ✓
    Darwin
Answer
Correct option: D.
Darwin
D. Darwin
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MCQ 261 Mark
The Y-chromosome in human male …………
  • A
    possesses the same size as that of X-chromosome.
  • B
    is larger in size than that of X-chromosome.
  • ✓
    is smaller in size than that of X-chromosome.
  • D
    is of double the size than that of X-chromosome.
Answer
Correct option: C.
is smaller in size than that of X-chromosome.
C. is smaller in size than that of X-chromosome.
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MCQ 281 Mark
Which organ of fish is homologous with the hand of human being?
  • A
    Appendages
  • ✓
    Fin
  • C
    Gills
  • D
    Lungs
Answer
Correct option: B.
Fin
B. Fin
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MCQ 291 Mark
In which animal did the eyes originate first?
  • A
    Paramoecium
  • B
    Plasmodium
  • ✓
    Planaria
  • D
    Peripatus
Answer
Correct option: C.
Planaria
C. Planaria
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MCQ 301 Mark
Where is the origin of Homo sapiens?
  • ✓
    Africa
  • B
    Eurasia
  • C
    Indonesia
  • D
    Philippines
Answer
Correct option: A.
Africa
A. Africa
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MCQ 311 Mark
In the result of Mendel's experiment on the inheritance of two characters, the ratio of the plants showing yellow and wrinkled seeds and of the plants showing green and round seeds in $F2$ generation is ………..
  • ✓
    $3 : 3  $
  • B
    $1 : 4$
  • C
    $3 : 1  $
  • D
    $4 : 4$
Answer
Correct option: A.
$3 : 3  $
$3 : 3$
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MCQ 321 Mark
Which is the important factor for the formation of new species?
  • ✓
    Geographical isolation of population
  • B
    Variations
  • C
    Genetic drift
  • D
    All of the given
Answer
Correct option: A.
Geographical isolation of population
A. Geographical isolation of population
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MCQ 331 Mark
With which region are the genetical footprints of the human beings related?
  • A
    Asia
  • B
    Australia
  • ✓
    Africa
  • D
    America
Answer
Correct option: C.
Africa
C. Africa
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MCQ 341 Mark
Which plant was obtained, from the sterile flowers of cabbage, by using the artificial selection technique?
  • A
    Broccoli
  • ✓
    Cauliflower
  • C
    Kohlrabi
  • D
    Kale
Answer
Correct option: B.
Cauliflower
B. Cauliflower
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MCQ 351 Mark
Which type of animals were the Dinosaurs having feathers?
  • ✓
    Reptilia
  • B
    Aves
  • C
    Mammalia
  • D
    Both $A$ and $B$
Answer
Correct option: A.
Reptilia
A. Reptilia
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MCQ 361 Mark
Which one of the following is not homologous?
  • A
    Forelimbs in humans and lizard
  • B
    Forelimbs in lizard and frog
  • ✓
    Wings of butterfly and bat
  • D
    Wings in bat and bird
Answer
Correct option: C.
Wings of butterfly and bat
C. Wings of butterfly and bat
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MCQ 371 Mark
Which factor conducts the expressive genetic information from one generation to another?
  • A
    Protein
  • ✓
    $DNA$
  • C
    $RNA$
  • D
    Enzyme
Answer
Correct option: B.
$DNA$
$DNA$
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MCQ 381 Mark
Which scientist was the first to conduct systematic experiments for the study of heredity?
  • A
    Watson
  • B
    Sutton
  • ✓
    Mendel
  • D
    Khorana
Answer
Correct option: C.
Mendel
C. Mendel
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MCQ 391 Mark
What do the examples of Dinosaurs having feathers and the birds having feathers suggest in the study of evolution?
  • A
    The reptiles have been evolved from Aves.
  • ✓
    The Aves have been evolved from reptiles.
  • C
    Both are the animals of the same class.
  • D
    There is no evolutionary relationship between these two groups of animals.
Answer
Correct option: B.
The Aves have been evolved from reptiles.
B. The Aves have been evolved from reptiles.
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MCQ 401 Mark
Which is a false statement for variation? 
  • ✓
    All the variations in a species provide equal opportunity for survival.
  • B
    Very few variations are generated in asexual reproduction.
  • C
    Variations selected by the environmental factors cause the occurrence of evolution.
  • D
    The change in the genetic material $(DNA)$ results in variation.
Answer
Correct option: A.
All the variations in a species provide equal opportunity for survival.
A. All the variations in a species provide equal opportunity for survival.
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MCQ 411 Mark
Study following statements $(P$ to $R)$ and choose the correct alternative: $P :$ Those organs which have the same internal structure but different functions are called homologous organs. $Q :$ Organs which have different basic design but have similar appearance and carry out similar functions are called analogous organs. $R :$ The impressions of dead plants or animals that lived in the past are known as fossils.
  • A
    Only $R$ is true.
  • ✓
    All the three statements are true.
  • C
    Statements $P$ and $Q$ are true, but $R$ is false.
  • D
    All the three statements are false.
Answer
Correct option: B.
All the three statements are true.
All the three statements are true.
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MCQ 421 Mark
When hybridisation is carried out between a tall $(TT)$ pea plant and a short $(tt)$ pea plant, all the plants (offsprings) show the expression of tallness, because ………..
  • ✓
    the expression of tallness is dominant.
  • B
    the expression of short is dominant.
  • C
    the expression of tallness is recessive.
  • D
    the character of tallness in pea plant is not controlled by gene $T$ or $t.$
Answer
Correct option: A.
the expression of tallness is dominant.
the expression of tallness is dominant.
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