MCQ Bank

Rhizopus is a well-known example of a fungus traditionally classified under the phylum Zygomycota. It is commonly found as a bread mold and forms zygospores during sexual reproduction.

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Q41

Approximately what percentage of true fungi species are classified under Zygomycota?

A) 20%
B) 5%
C) 1%
D) 10%

AI Explanation

Zygomycota represents a relatively small proportion of true fungal species, estimated at around 5%. Most known fungi belong to other major groups such as Ascomycota and Basidiomycota.

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Q42

What type of relationship do fungi have with most plants?

A) Symbiotic (mutualistic)
B) Parasitic
C) Commensal
D) Antagonistic

AI Explanation

Many fungi form mutualistic relationships with plants, especially through mycorrhizal associations. The fungus helps plants obtain nutrients and water while receiving carbohydrates in return.

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Q43

Which type of reproduction is found in Glomeromycota?

A) Both sexual and asexual
B) Only sexual
C) Budding
D) Only asexual

AI Explanation

Glomeromycota are generally considered to reproduce asexually through the formation of spores. They do not have a known sexual reproductive stage.

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Q44

Seeds first appeared during which geological period?

A) Triassic
B) Devonian
C) Carboniferous
D) Jurassic

AI Explanation

The earliest seed plants appeared during the Devonian period. This development was a major evolutionary step that allowed plants to reproduce more effectively on land.

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Q45

Why do mosses remain small in size compared to vascular plants?

A) They lack vascular tissues
B) Their roots are shallow
C) They lack sunlight
D) They have slow growth rate

AI Explanation

Mosses are non-vascular plants and do not have specialized tissues for transporting water and nutrients over long distances. This limits their size compared with vascular plants.

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Q46

Which male plant structure produces pollen?

A) Stigma
B) Style
C) Anther
D) Ovary

AI Explanation

The anther is the male reproductive structure of a flower that produces pollen grains. Pollen contains the male gametes required for fertilization.

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Q47

What is the function of rhizoids in moss?

A) Anchorage and absorption
B) Reproduction
C) Seed dispersal
D) Photosynthesis

AI Explanation

Rhizoids in mosses help attach the plant to the substrate and absorb some water and nutrients. They are not true roots because they lack vascular tissues.

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Q48

The largest living group of gymnosperms is:

A) Ferns
B) Gnetophytes
C) Cycads
D) Conifers

AI Explanation

Conifers are the largest and most diverse living group of gymnosperms. They include plants such as pines, firs, and spruces.

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Q49

What makes seed plants less dependent on water for reproduction?

A) Water storage in leaves
B) Pollen grains do not need water to reach the ovule
C) Rhizoids
D) Stomata

AI Explanation

Seed plants are less dependent on water for reproduction because pollen can be transported by wind or animals to the ovule. This allows fertilization to occur without free water.

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Q50

What happens to the zygote after fertilization?

A) Dies after a day
B) Germinates into gametophyte
C) Detaches from gametophyte
D) Grows into a sporophyte

AI Explanation

After fertilization, the zygote develops into a sporophyte generation in bryophytes. The sporophyte remains attached to and dependent on the gametophyte for nutrition.

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Q51

How do bryophytes help in preventing soil erosion?

A) By forming flowers
B) By growing roots
C) By producing mucus
D) By acting as soil binders and forming a bed

AI Explanation

Bryophytes help prevent soil erosion by forming dense mats that hold soil particles together. Their growth provides protection and stability to the soil surface.

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Q52

Bryophytes are considered pioneers because:

A) They were first to colonize land from aquatic environments
B) They have flowers
C) They live in deserts
D) They form seeds

AI Explanation

Bryophytes are considered pioneer plants because they were among the earliest plants to move from aquatic habitats onto land. They helped create conditions suitable for later plant colonization.

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Q53

What does the antheridium produce?

A) Zygote
B) Sperm
C) Egg
D) Spore

AI Explanation

The antheridium is the male reproductive structure in bryophytes and produces sperm cells. These sperm require water to swim to the egg for fertilization.

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Q54

Which vascular tissue is made up of non-living cells and transports water?

A) Cambium
B) Epidermis
C) Phloem
D) Xylem

AI Explanation

Xylem is vascular tissue composed mainly of non-living cells that transport water and minerals from roots to other parts of the plant. Phloem, in contrast, transports sugars and organic nutrients.

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Q55

Which of the following is a nonvascular plant group?

A) Ferns
B) Angiosperms
C) Gymnosperms
D) Liverworts

AI Explanation

Liverworts are nonvascular plants belonging to the bryophyte group. They lack specialized vascular tissues such as xylem and phloem for transport.

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Q56

Gravitropic response in roots means:

A) Movement away from soil
B) No movement
C) Movement towards light
D) Movement towards gravity

AI Explanation

Gravitropism is a plant growth response to gravity. Roots typically show positive gravitropism by growing downward toward the force of gravity.

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Q57

The only living gymnosperm species in China is:

A) Ginkgo biloba (Geno)
B) Juniper
C) Cedar
D) Pine

AI Explanation

Ginkgo biloba is the only surviving species of its group and is a living gymnosperm native to China. It is often called a living fossil due to its ancient lineage.

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Q58

What protects the seed from desiccation?

A) Thick protective coat
B) Alula
C) Pollination
D) Stored nutrients

AI Explanation

The seed coat protects the seed from desiccation and environmental damage. It helps maintain viability during unfavorable conditions.

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Q59

Which plant group possesses vascular tissues?

A) Mosses
B) Liverworts
C) Tracheophytes
D) Hornworts

AI Explanation

Tracheophytes are vascular plants that possess xylem and phloem tissues. These tissues allow efficient transport of water, minerals, and nutrients throughout the plant.