PLA | MCQs

Explanation

• If the area of the parallel plate capacitor is doubled, the capacitance will also double.
• The capacitance of a parallel plate capacitor is directly proportional to the area of the plates: C = ε × (A/d)
  

Explanation

In an optical fiber, the core is made of a material with a relatively high refractive index, typically glass or plastic with a high refractive index.

This allows the light to be confined and transmitted through the fiber via total internal reflection.

The cladding surrounding the core has a lower refractive index, which helps to keep the light within the core.

Explanation

Polyethene, also known as polyethylene, is a type of plastic.

It is a thermoplastic polymer made from ethylene monomers.

It is commonly used in packaging, plastic bags, and containers.

Explanation

In angiosperms, the 3N (triploid) zygote develops into the endosperm, a nutrient-rich tissue that surrounds and nourishes the embryo in the seed.

The endosperm is formed when the fertilized central cell of the embryo sac (3N) divides and grows.

Explanation

The female gametophyte of angiospermic plants is the embryo sac.

It ilso known as the megagametophyte.

It is the haploid (containing one set of chromosomes) structure within the ovule that contains the egg cell and is responsible for fertilization.

Explanation

Apomixis is a type of seed production that occurs without the fusion of male and female gametes (fertilization).

Instead, an egg cell develops into a seed without being fertilized, resulting in offspring that are genetically identical to the parent plant.

Explanation

Suckers are shoots that arise from buds on the base of a parent plant, often at the soil line or just below.

They are a type of vegetative propagation, allowing the plant to produce new stems and roots.

Suckers can grow into new individuals, eventually forming a clump or colony.

Explanation

Ginger has rhizomes, which are horizontal underground stems that can give rise to new plants, allowing it to propagate vegetatively.

Explanation

Spores are specialized structures in unicellular organisms, such as bacteria, fungi, and some protists, that enable asexual reproduction without fusion.

Spores are highly resistant to environmental stresses and can germinate into a new individual when conditions are favorable.

Explanation

Plants exhibit chemical coordination, also known as hormonal coordination, which involves the use of plant hormones or phytohormones to coordinate activities such as:

• Cell growth and differentiation
• Root and stem elongation
• Leaf senescence
• Flowering and fruiting
• Response to environmental stimuli