The plasma membrane is described as selectively permeable because it:

Which of the following is not a function of the nucleus?

In plants, transpiration mainly occurs through:

The movement of food in plants takes place through:

Which process results in the release of maximum energy from glucose?

Which part of the human brain controls voluntary actions?

The hormone that regulates metabolism of carbohydrates, proteins and fats is secreted by:

Which of the following statements about reflex action is correct?

The functional unit of kidney is called:

In human beings, fertilisation normally occurs in the:

Which of the following is a sexually transmitted disease?

The type of reproduction that does not involve fusion of gametes is called:

The genotype of a heterozygous tall pea plant is represented as:

Which of the following traits is expressed in the F₁ generation of a monohybrid cross?

The accumulation of non-biodegradable substances in higher trophic levels is called:

Which group of organisms helps in recycling nutrients in an ecosystem?

Energy transfer from one trophic level to the next follows the:

Which of the following is an example of biodegradable waste?

Variation is important in organisms because it: