Which of the following is an example of homologous organs is ? (1) Our arm and a dog's foreleg (2) Our teeth and an elephant's tusk (3) Pot at o and runners of grass (4) All of the above
According to the evolutionary theory, for motion of a new species is generally due to
(1) Sudden creation by nature (2) Accumulation of variations over several generations (3) Clones formed during asexual reproduction (4) Movement of individuals are habitat to other
Mendel used a number of contrasting visible characters of garden pea. Which of the following is incorrect pair of contrasting characters ? (1) Tall/Dwarf - Height of stem (2) Round / Wrinkled - Shape of seed (3) White / Red - Colour of flower (4) Yellow / Green - Colour of seed
Which one ofthe following statement is true? (1) In humans there are two pairs ofsex chromosome. (2) A child who inherits an x chromosome from fat her will be a boy. (3) A child who inherits an y chromosome from fat her will be a girl. (4) A child who inherits an x chromosome from fat her will be a girl.
A rose plant obtained f rom self cross of het erozygous red has produced 200 f lowers. How many of them would be heterozygous red flowers ? (1) 25 (2) 50 (3) 100 (4) 150
