The growth curve of bacterial population in lab is plotted against time. What will be the shape of graph

• Sigmoid

• Hyperbolic

• Ascending straight line

• Descending straight line

Assertion: Koel does not build nest for egg laying.

Reason: Koel lays its eggs in the nest of tailor bird.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is falsen

• If both assertion and reason are false.

Assertion: Persons suffering from haemophilia fail to produce blood clotting factor VIII.

Reason: Prothrombin producing platelets in such persons are found in very low concentration.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: Hybridoma cells are shifted to a medium deficient in nutrient which cannot be synthesized by myeloma cells.

Reason: This medium allows selection of hybridoma cells.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

55.

Assertion: Maize is an albuminous seed. 

Reason: Endosperm is completely absorbed by its growing embryo

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: Many plants are propagated vegetatively even though they bear seeds.

Reason: Potatoes multiply by tubers and apple by cutting.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: Nuclear endosperm is formed by subsequent nuclear division without wall formation.

Reason: Coconut is an example of such endosperm, where the endosperm remains nuclear throughout the development of the fruit

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: In mammals the female secondary sexual characters are developed by gonadotropins.

Reason: Gonadotropins are secreted by graafian follicle.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion: The plant biomass which serves as the food of herbivores and decomposers is said to result from the gross primary productivity.

Reason: Gross primary productivity is the rate of net production of organic material (biomass).

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false

Assertion: Dimethyl mercury is a highly persistent pollutant that accumulates in food chains.

Reason: Mercury pollution is responsible for minamata.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.