MCQ Bank

In seed plants, pollen grains carry the male gametes to the female reproductive structure. They allow fertilization to occur without the need for free water.

BT201 Final Term AI Solved

Q61

Which group does moss belong to?

A) Angiosperms
B) Pteridophytes
C) Bryophytes
D) Gymnosperms

AI Explanation

Mosses belong to the group Bryophytes, which are nonvascular plants. They lack true roots, stems, and leaves with vascular tissues.

BT201 Final Term AI Solved

Q62

Why do bryophytes remain small in size?

A) They lack chloroplasts
B) They grow slowly
C) They do not have vascular tissues
D) Their leaves are broad

AI Explanation

Bryophytes remain small because they lack xylem and phloem for efficient transport of water and nutrients. This limits their growth compared with vascular plants.

BT201 Final Term AI Solved

Q63

Which of the following is NOT a seedless vascular plant?

A) Pine
B) Club moss
C) Horsetail
D) Fern

AI Explanation

Pine is a gymnosperm and produces seeds, so it is not a seedless vascular plant. Club mosses, horsetails, and ferns reproduce through spores and are seedless vascular plants.

BT201 Final Term AI Solved

Q64

Which habitat is most favorable for the growth of bryophytes?

A) Moist environments
B) Salty oceans
C) Sandy beaches
D) Dry plains

AI Explanation

Bryophytes grow best in moist environments because they require water for reproduction and efficient nutrient absorption. They are commonly found in damp, shaded areas.

BT201 Final Term AI Solved

Q65

What is the dominant stage in the life cycle of mosses?

A) Gametophyte
B) Seedling
C) Sporophyte
D) Rhizoid

AI Explanation

In mosses, the gametophyte is the dominant and long-lived stage of the life cycle. The sporophyte remains attached to and dependent on the gametophyte for nutrition.

BT201 Final Term AI Solved

Q66

What happens after the sperm fuses with the egg in the moss life cycle?

A) A seed is formed
B) A zygote is formed and develops into a sporophyte
C) A gametophyte forms
D) The plant dies

AI Explanation

After fertilization, the sperm fuses with the egg to form a zygote. The zygote develops into the sporophyte generation, which produces spores.

BT201 Final Term AI Solved

Q67

What property allows Sphagnum to retain water effectively?

A) Root hairs
B) Waxy cuticle
C) Water-holding capacity of cells
D) Air-filled pores

AI Explanation

Sphagnum moss can retain large amounts of water because its cells have a high water-holding capacity. This property allows it to form water-rich peat environments.

BT201 Final Term AI Solved

Q68

Which of the following is an example of self-pollination?

A) Wind carries pollen over a mountain
B) Pollen moves from male to female parts of the same flower
C) Pollen travels to a different species
D) A bee pollinates several plants

AI Explanation

Self-pollination occurs when pollen is transferred from the male part (anther) to the female part (stigma) of the same flower. It does not require another plant.

BT201 Final Term AI Solved

Q69

In which geological period did roots first evolve?

A) Cambrian
B) Jurassic
C) Silurian
D) Devonian

AI Explanation

The first true roots evolved during the Silurian period as early vascular plants adapted to life on land. Roots helped plants anchor themselves and absorb water and minerals.

BT201 Final Term AI Solved

Q70

Which plant group produces naked seeds?

A) Angiosperms
B) Bryophytes
C) Gymnosperms
D) Algae

AI Explanation

Gymnosperms are seed-producing plants that have naked seeds, meaning the seeds are not enclosed within a fruit. Examples include pine and cycad plants.

BT201 Final Term AI Solved

Q71

Why are seeds considered a key adaptation for terrestrial life?

A) Because they are small
B) They produce flowers
C) They don’t need roots
D) They protect embryos and allow survival in harsh environments

AI Explanation

Seeds protect developing embryos and contain stored nutrients that support early growth. They allow plants to survive unfavorable environmental conditions and disperse to new locations.

BT201 Final Term AI Solved

Q72

What ecological role does peat moss play in succession?

A) It attracts bees
B) It absorbs water and converts muddy banks into solid soil
C) It provides oxygen to lakes
D) It eats bacteria

AI Explanation

Peat moss (Sphagnum) plays an important ecological role by absorbing and retaining water. It contributes to soil formation and succession by stabilizing wet environments.

BT201 Final Term AI Solved

Q73

The protective structure at the tip of the root is:

A) Root node
B) Root cap
C) Apical meristem
D) Root hairs

AI Explanation

The root cap is the protective structure at the tip of the root. It protects the delicate growing tissues as the root pushes through soil.

BT201 Final Term AI Solved

Q74

What is the function of lignin in xylem walls?

A) It stores food
B) It provides rigidity and prevents water loss
C) It breaks down minerals
D) It facilitates gas exchange

AI Explanation

Lignin strengthens xylem cell walls and provides structural support to plants. It also helps prevent collapse of water-conducting vessels and reduces water loss.

BT201 Final Term AI Solved

Q75

Phloem mainly transports:

A) Water
B) Food and minerals
C) Chlorophyll
D) Carbon dioxide

AI Explanation

Phloem transports organic nutrients, especially sugars produced during photosynthesis, from leaves to other parts of the plant. It does not primarily transport water, which is the function of xylem.

BT201 Final Term AI Solved

Q76

. The word "gymnosperm" literally means:

A) Flowering seed
B) Naked seed
C) Covered seed
D) Fertile seed

AI Explanation

The term gymnosperm comes from Greek words meaning 'naked seed'. Gymnosperm seeds are exposed rather than enclosed within an ovary or fruit.

BT201 Final Term AI Solved

Q77

Which generation is dominant in higher plants?

A) None of the above
B) Sporophyte
C) Gametophyte
D) Zygote

AI Explanation

In higher plants, the sporophyte generation is dominant and represents the main visible plant body. The gametophyte is reduced and dependent on the sporophyte in many groups.

BT201 Final Term AI Solved

Q78

Gymnosperm seeds are called “naked” because they:

A) Are dispersed by water
B) Are not enclosed in ovaries
C) Lack stored food
D) Grow only on leave

AI Explanation

Gymnosperm seeds are called naked because they develop exposed on the surface of reproductive structures rather than being enclosed inside an ovary. This distinguishes them from angiosperms.

BT201 Final Term AI Solved

Q79

How does sperm reach the egg in mosses?

A) Swimming through water
B) Direct contact
C) Wind pollination
D) By insects

AI Explanation

Moss sperm are flagellated and require water to swim from the male reproductive structure to the egg. This dependence on water is a characteristic feature of bryophyte reproduction.