In human beings, the correct sequence of the events during reproduction is
zygote, gamete formation, fertilisation, embryo
gamete formation, fertilisation, zygote, embryo
gamete formation, zygote, fertilisation, embryo
gamete formation, fertilisation, embryo, zygote
B.
gamete formation, fertilisation, zygote, embryo
An object of mass 6 kg is sliding on a frictionless horizontal surface with a uniform speed of 3 m/s. The force required to keep the object moving at the same speed along the same straight line is
27 newton
18 newton
54 newton
zero newton
Study the following statements about villi (singular villus).
Identify the statements which give the characteristics that enable the villi to absorb the digested food.
C and D
B and D
A, B, and C
A and B
Consider the following terms related to cells.
Out of these, the parts of the nucleus of a cell are
C and D
B and C
A, B, and C
A and C
Consider the following edible plants
Select from these a pair of plants that has two or more than two edible parts.
C and D
B and C
A and D
A and B
Which one of the following elements must be available in sufficient quantity in the water of a pond in at tadpoles are growing?
Oxygen
Iodine
Nitrogen
Chlorine
Select from the following a set of ruminants
Buffalo, cow, deer
Cat, buffalo, deer
Buffalo, cow, dog
Cow, deer, dog
Consider the following statements about biodiversity.
The true statement(s) about biodiversity is/are
A, B, and C
Only C
A, C, and D
A and B
The common characteristic properties of plastics are
durable, good conductor of electricity, non-reactive
durable, good conductor of heat, non-reactive
good conductor of heat, light in weight, a good conductor of electricity
durable, light in weight, non-reactive