تدريب عام: Unit 3 : Reproduction in Living Organisms (Science) - Preparatory 2 - Science

السؤال 1

What characterizes self-pollination in flowers?

Pollen is transferred from an anther to a stigma on the same plant.

Pollen grains are always light, dry, and smooth.

Stamens and pistils mature at different times.

Pollen is transferred between flowers on two different plants.

السؤال 2

What is the chromosome number found in a zygote formed through sexual reproduction?

A quarter of the original chromosome number (n/2).

A complete set of chromosomes (2n).

An unpredictable number of chromosomes.

Half the number of chromosomes (n).

السؤال 3

An elephant has 56 chromosomes and a crow has 80 chromosomes. What conclusion can be drawn from this?

Chromosome count indicates the evolutionary age of a species.

Elephants have fewer genes than crows.

Crows are genetically more complex than elephants.

Chromosome count does not determine an organism's size.

السؤال 4

Besides protecting reproductive organs, what is a key function of the corolla?

Providing structural support to the entire flower.

Developing into the seed after successful pollination.

Producing ovules for fertilization.

Attracting pollinating insects that assist in sexual reproduction.

السؤال 5

What event immediately follows the formation of a zygote in sexual reproduction?

The zygote undergoes a reductional division.

The zygote divides meiotically to form gametes.

The zygote begins to undergo mitotic divisions to develop into an embryo.

The zygote immediately becomes a mature organism.

السؤال 6

The pedicel is the swollen part of the flower that bears the floral leaves.

False

True

السؤال 7

What is a primary function of the corolla?

Producing pollen grains for reproduction.

Attracting pollinating insects with its bright colors and fragrance.

Developing into the fruit after fertilization.

Anchoring the flower to the stem.

السؤال 8

Which characteristic is typical of wind-pollinated flowers?

Their pollen grains are light, dry, and smooth.

Their anthers are located inside the flower due to short filaments.

Their petals are large with bright colors.

They typically have a noticeable scent and secrete nectar.

السؤال 9

Maize (corn) flowers are examples of unisexual flowers.

True

False

السؤال 10

Where does meiosis primarily occur in living organisms?

In the gonads to produce gametes.

Only in damaged tissues for repair.

In bacterial cells for reproduction.

In all somatic cells for growth.

السؤال 11

Which of the following cell types typically contains a diploid (2n) number of chromosomes?

Somatic cells of an organism

Sperm cells

Ova

Pollen grains

السؤال 12

What is the collective term for the male reproductive organs of a flower?

Petals

Pistil

Stamens

Carpels

السؤال 13

What are gonads primarily responsible for producing in animals and humans?

Gametes, which are specialized cells for sexual reproduction.

Somatic cells for growth.

Complete genetic clones.

Cancerous tumors.

السؤال 14

After fertilization, the ovules contained within the ovary develop to become the seeds.

True

False

السؤال 15

Under what condition are the calyx and corolla referred to collectively as the perianth?

When a flower contains only sepals and lacks petals entirely.

When petals are fused and arranged in a single whorl.

When sepals cannot be distinguished from petals based on color or appearance.

When both sepals and petals are absent from the flower.

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تدريب عام: Unit 3 : Reproduction in Living Organisms (Science) - Preparatory 2

What characterizes self-pollination in flowers?

What is the chromosome number found in a zygote formed through sexual reproduction?

An elephant has 56 chromosomes and a crow has 80 chromosomes. What conclusion can be drawn from this?

Besides protecting reproductive organs, what is a key function of the corolla?

What event immediately follows the formation of a zygote in sexual reproduction?

The pedicel is the swollen part of the flower that bears the floral leaves.

What is a primary function of the corolla?

Which characteristic is typical of wind-pollinated flowers?

Maize (corn) flowers are examples of unisexual flowers.

Where does meiosis primarily occur in living organisms?

Which of the following cell types typically contains a diploid (2n) number of chromosomes?

What is the collective term for the male reproductive organs of a flower?

What are gonads primarily responsible for producing in animals and humans?

After fertilization, the ovules contained within the ovary develop to become the seeds.

Under what condition are the calyx and corolla referred to collectively as the perianth?