CBSE Questions for Class 10 Biology Heredity And Evolution Quiz 7 - MCQExams.com

The heart of mammals and birds is four-chambered, while fishes have two-chambered hearts and amphibians and reptiles have three-chambered hearts. The hearts of birds and mammals are:
  • Analogous
  • Homologous
  • Parallel
  • Transitional
  • Vestigial
What is true about the genotypes of offsprings produced as a result of cross between a pea plant with genotype YY that produces yellow seeds and a pea plant with genotype yy that produces green seeds?
  • All are YY
  • All are Yy
  • All are yy
  • Half YY and half yy
  • Half YY and half Yy
In his theory of natural selection, Charles Darwin suggested "survival of fittest" as basis of organic evolution. The correct explanation for "survival of fittest" is
  • The strongest members of a population are those who breed and leave offspring.
  • The members of a population that are strongest, survive the longest.
  • The members of a population that are best suited for their environment breed and have offspring.
  • The weakest members of a population do not reproduce so their traits are not passed on.
  • The members of a population that are least suited die off immediately.
The Punnett square below shows a cross between a pure tall and heterozygous tall plant. What will be the percentage of tall offspring?

 GameteT  T
T TTTT 
 tTt Tt 
  • None are short
  • $$25\%$$ are short
  • $$50\%$$ are short
  • $$75\%$$ are short
  • All are short
Which one of the following features represents a recessive character in Mendel's pea plants?
  • Round seed
  • Green pod colour
  • Red flower
  • Yellow pod colour
The evolutionary stages between the current organism and their ancestors are shown by ____________.
  • Fossils
  • Phylogenetic tree
  • Morphology
  • All of the above
Organisms with homologous structures likely
  • share a common environment
  • share common ancestry
  • share common behavior patterns
  • have increased genetic diversity
  • have decreased genetic diversity
Which of the following creates a selection pressure for or against a trait?
  • Environment
  • Genetic drift
  • Mutation
  • Evolution
Formation of rudimentary eyes shows the evolution in an organism is 
  • Primary stage of evolution
  • Intermediate stage of evolution
  • Final stage of evolution
  • None of the above
Which of the following situations would lead to the evolution and formation of new species?
  • Changing climate
  • Cool climate
  • Warm climate
  • Stable climate
Primitive man was evolved in
  • Africa
  • America
  • Australia
  • India
Genes are segments of:
  • Chromosome
  • DNA
  • mRNA
  • Nucleolus
Mendel chose pea plant to demonstrate the inheritance of characters because
  • They are leguminous plant
  • They have contrasting characters
  • They have seeds
  • None of the above
Which is not a vestigial organ in human body?
  • Tail-bone
  • Ear Muscle
  • Wisdom teeth
  • Nail
It is a commonly held misconception that the mother's egg is responsible for determining whether the baby will be a boy or a girl. But actually, it is the father's sperm, which decides this.
Which of the following makes the sperm the decisive factor?
  • More number of male gametes fuse with the female gamete during fertilization.
  • There are more number chromosomes in male gametes compared to female gametes.
  • Hormones are secreted only in the males which determine the sex of the baby.
  • A male gamete can have either of the two sex chromosomes (X or Y), while the female gamete has only one (X).
The human species have genetic roots in 
  • India
  • America
  • Africa
  • Australia
Darwin proposed that new species evolve from ancestral forms by? 
  • Gradual accumulation of adaptions to changing environment
  • Struggle for limited resources
  • Accumulation of mutations
  • Inheritance of acquired adaptations to environment
Which of the following contrasting characters were studied by Mendel in garden pea?
  • Height
  • Seed colour
  • Shape of the seed
  • All of the above
A cross involving parents differing only in one trait is:
  • Haploid
  • Diploid
  • Monohybrid cross
  • Dihybrid cross
A recessive trait in garden pea is:
  • Wrinkled seeds
  • Tall stem
  • Round seeds
  • Coloured seed coat
The book "Origin of species" was written by ___________.
  • Darwin
  • Beagle
  • Mendel
  • Sutton
Mendel selected Pea as material for his experiments because
  • It is an annual plant with comparatively short life cycle
  • The flowers are self-pollinated
  • The number of seeds produced is quite large
  • All the above
Atmosphere of earth just before the origin of life consisted of  ________________.
  • Water vapours, $$CH_4 , NH_3 $$ and Oxygen
  • $$ CH_4 , NH_3 $$ and $$H_2$$S
  • $$ CO_2 , NH_3 , H_2 $$ and water vapours
  • $$ CH_4 , O_3 , O_2 $$ and water vapours
Which of the following statement can be related to Mendel's experiments?
  • Habits are inherited
  • Characters are inherited
  • Characters cannot be inherited
  • None of the above
By the statement 'survival of the fittest', Darwin meant that:
  • The strongest of all species will survive.
  • The most intelligent of the species will survive.
  • The cleverest of the species will survive.
  • The most adaptable of the species that are reproductively fit will survive.
Which was absent/ least abundant in the atmosphere at the time of origin of life ?
  • $$NH_3$$
  • $$H_2$$
  • $$O_2$$
  • $$CH_4$$
$$F_2$$ generation is produced as a result of
  • Crossing $$F_1$$ individuals with dominant individuals
  • Crossing $$F_1$$ individuals with recessive individuals
  • Crossing $$F_1$$ individuals amongst themselves
  • All the above
Human evolution originated in
  • Africa
  • Jawa
  • France
  • China
Living organisms on the Earth have evolved gradually from one form to another over the million years. This statement was given by
  • Darwin
  • Robert Hook
  • Linneaus
  • Haldane
Which of the following statements is incorrect with respect to evolution?
  • Fossils provide important information.
  • Embryological stages of higher animals are similar.
  • Fore limbs of cows and wings of birds are analogous.
  • Variations among individuals are important for survival.
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