MCQ Bank

Preserving plant diversity supports ecosystem stability and provides essential resources such as food, medicines, and materials. Diverse plant communities also help maintain ecological processes.

BT201 Final Term AI Solved

Q121

Which sequence best represents angiosperm evolution?

A) Ferns → Gymnosperms → Angiosperms
B) Aquatic plants → Closed carpel flowers → Fleshy fruits → Dominance on land
C) Land plants → Cones → Naked seeds → Flowers
D) Spores → Cones → Fruits

AI Explanation

Angiosperm evolution involved adaptations such as enclosed ovules in carpels, fruit formation, and improved reproductive strategies. These features helped flowering plants become dominant on land.

BT201 Final Term AI Solved

Q122

Which factor best explains why angiosperms dominate most ecosystems?

A) Presence of cones for seed protection
B) Slower seed development than gymnosperms
C) Faster fertilization and seed production
D) Lack of flowers

AI Explanation

Angiosperms dominate many ecosystems because they have efficient reproduction, rapid fertilization, and effective seed dispersal through fruits. These adaptations increase their survival and spread.

BT201 Final Term AI Solved

Q123

Which adaptation helps prevent self-pollination?

A) Closed flowers with sticky stigma
B) Bright petals and nectar to attract insects
C) Absence of pollinators
D) Same height of anther and stigma

AI Explanation

Bright flowers and nectar attract animal pollinators, promoting pollen transfer between different plants rather than self-pollination. This increases genetic diversity.

BT201 Final Term AI Solved

Q124

Why are plant spores resistant to harsh environments?

A) Because they have stomata
B) Due to the presence of sporopollenin in their walls
C) Because they are multicellular
D) Because they are fertilized

AI Explanation

Sporopollenin is a highly resistant substance found in spore walls that protects spores from drying and environmental stress. It allows spores to survive harsh conditions.

BT201 Final Term AI Solved

Q125

Select the correct sequence to classify an unknown flowering plant:

A) Only count flower parts
B) Check height → Count leaves → Check bark → Check seed size
C) Count cotyledons → Check venation → Observe flower parts → Check vascular bundle arrangement
D) Observe flowers → Check seeds → Check roots → Count cotyledons

AI Explanation

Flowering plants are commonly classified by examining key traits such as the number of cotyledons, leaf venation, floral structures, and vascular bundle arrangement. These features help distinguish major groups like monocots and dicots.

BT201 Final Term AI Solved

Q126

Which of the following is NOT a function of plant biodiversity?

A) Oxygen production
B) Increasing air pollution
C) Providing shelter to animals
D) Soil erosion prevention

AI Explanation

Plant biodiversity helps produce oxygen, provide habitats, and reduce soil erosion. Increasing air pollution is harmful to ecosystems and is not a function of plant biodiversity.

BT201 Final Term AI Solved

Q127

What is the role of mycorrhizae in land plant adaptation?

A) Increase root surface area for water/nutrient absorption
B) Decrease transpiration
C) Prevent predation
D) Reproduction

AI Explanation

Mycorrhizae are mutualistic associations between fungi and plant roots. They extend the effective root system, improving absorption of water and minerals from soil.

BT201 Final Term AI Solved

Q128

Which of the following features helps monocots adapt to herbaceous life?

A) Woody tissues
B) Thick secondary xylem
C) Scattered vascular bundles
D) Reticulate venation

AI Explanation

Monocots typically have scattered vascular bundles, which support their herbaceous growth form. They generally lack extensive secondary growth and woody tissues.

BT201 Final Term AI Solved

Q129

Why do pollinators depend on flowers?

A) To avoid predators
B) For nectar and pollen as food sources
C) For shelter only
D) For dispersal by wind

AI Explanation

Pollinators visit flowers to obtain resources such as nectar and pollen. In return, they help plants by transferring pollen and enabling reproduction.

BT201 Final Term Unsolved

Q130

What is the function of the apical meristem in land plants?

A) Photosynthesize
B) Produce spores
C) Control water loss
D) Enable continuous upward growth