Class 8 Practice – Level 3 – Set 1 – Reproduction in animals

Total questions: 15

Which hormone plays a key role in stimulating the production of eggs in females and sperm in males?

Oxytocin

Progesterone

Follicle-Stimulating Hormone (FSH)

Thyroxine

None

During the development of the embryo, the process of implantation occurs in:

The ovary

The fallopian tube

The cervix

The uterus

None

In which of the following organisms does parthenogenesis (development of an egg without fertilization) occur naturally?

Mammals

Birds

Lizards

Fish

None

Cloning results in:

Genetically identical individuals

Genetically diverse individuals

Individuals with half the chromosome number

Increased genetic variation

None

In honeybees, the drone bee (male) develops through which reproductive process?

Sexual reproduction

Parthenogenesis

Binary fission

External fertilization

None

In human reproduction, if multiple sperm cells penetrate an egg simultaneously, what would happen?

Multiple embryos would form

The zygote would be diploid

The egg would not survive

The egg would develop into twins

None

The placenta performs all the following functions except:

Nutrient exchange between mother and fetus

Oxygen and carbon dioxide exchange

Secretion of hormones to maintain pregnancy

Transmission of maternal antibodies to the fetus

None

How does sexual reproduction contribute to genetic variation?

By producing identical offspring

Through recombination of alleles during meiosis

By maintaining a constant gene pool

By producing clones

None

Which of the following statements best explains why viviparous animals generally provide better protection to their offspring than oviparous animals?

Viviparous animals lay eggs with thick shells.

In viviparous animals, the developing embryo is protected inside the mother’s body.

Oviparous animals have fewer predators.

Viviparous animals lay eggs in a protected environment.

None

10.

One significant difference between reproduction in flowering plants and mammals is:

Mammals use meiosis while plants do not.

Plants require pollinators for sexual reproduction, whereas mammals do not.

Mammals can reproduce asexually, whereas plants cannot.

Plants do not require fertilization to reproduce sexually.

None

11.

Which reproductive strategy is most advantageous in a stable environment with limited resources?

Asexual reproduction

Sexual reproduction

Parthenogenesis

Both sexual and asexual reproduction equally

None

12.

Why do many aquatic animals that undergo external fertilization release a large number of eggs?

To ensure genetic uniformity

Because external fertilization is less efficient

To produce genetically identical offspring

To increase the chance of fertilization in a vast environment

None

13.

A genetic disorder in humans can arise if there is an error during the process of:

Mitosis

Fertilization

Meiosis

Regeneration

None

14.

Identical twins are formed when:

Two sperm fertilize one egg

One fertilized egg splits into two embryos

Two eggs are fertilized by two different sperm

One sperm fertilizes two eggs

None

15.

In which phase of the menstrual cycle is the uterine lining shed?

Ovulation phase

Luteal phase

Follicular phase

Menstrual phase

None

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Class 8 Practice – Level 3 – Set 1 – Reproduction in animals

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