Practice paper · Annual

In human respiratory system, when a person breathes in ,the position of ribs and diaphragms will be-

1. Alifted ribs and curved diaphragm
2. Blifted ribs and flattened diaphragm
3. Crelaxed rib and curved diaphragm
4. Drelaxed ribs and flattened diaphragm

In a person, the tubule part of the nephron is not functioning at all. What will its effect be on urine formation?

1. AThe urine will not be formed.
2. BQuality and quantity of urine is unaffected.
3. CUrine will be more concentrated.
4. DUrine will be more diluted.

Rajesh noticed that a potted plant kept in the window of his room shows bending towards sunlight. This could be due to:

1. AMore growth in the well-lit region due to diffusion of auxin hormone
2. BMore growth in the region away from light due to diffusion of auxin hormone
3. CMore growth in the well-lit region due to diffusion of cytokinin hormone
4. DMore growth in the region away from light due to diffusion of cytokinin hormone

The cerebellum in the brain controls the voluntary actions of the body. Which of these actions is controlled by the cerebellum?

1. ABeating of the heart
2. BBlinking of the eyes
3. CWatering of the mouth
4. DJumping from a height

The correct sequence of reproductive stages seen in flowering plants is:

1. AGametes, zygote, embryo, seedling
2. BZygote, gametes, embryo, seedling
3. CSeedling, embryo, zygote, gametes
4. DGametes, embryo, zygote, seedling

Which of these statements is incorrect about a balanced ecosystem?

1. AIt is made up of interconnected food chains.
2. BIt involves interdependence among living organisms and the environment.
3. CAnimals are dependent on plants, but plants are not dependent on animals.
4. DIt involves communities made up of different populations of organisms

Which of the following features relates to biodegradable substances?

1. ABroken down by biological processes
2. BRemain inert
3. CPersist in environment for long time
4. DMay harm the ecosystem

Assertion (A): A human female has a perfect pair of sex Chromosome. Reason (R): Sex chromosome contributed by the human male in the zygote decides the sex of a child

1. ABoth (A) and (R) are true, and (R) is the correct explanation of (A).
2. BBoth (A) and (R) are true, and (R) is not the correct explanation of (A).
3. C(A) is true but (R) is false.
4. D(A) is false but (R) is true.