Which of the following is NOT a characteristic of Kingdom Plantae?
Answer: C
Plants are autotrophic and perform photosynthesis. Heterotrophic nutrition is characteristic of animals and fungi, not plants.
Q.2Easy
Bryophytes are considered the link between aquatic and terrestrial plants because:
Answer: B
Bryophytes need water for fertilization as their sperms are motile. This characteristic links them to aquatic plants while they live on land.
Q.3Easy
The dominant gametophytic generation is found in:
Answer: C
In bryophytes, the gametophyte (moss plant) is dominant and independent, while the sporophyte depends on it for nutrition.
Q.4Easy
The arrangement of sporangia in ferns is called a:
Answer: A
A sorus (plural: sori) is a cluster of sporangia found on the underside of fern fronds, typically covered by an indusium.
Q.5Easy
Gymnosperms are characterized by:
Answer: B
Gymnosperms (Conifers, Cycads, Ginkgo) have seeds exposed on cone scales without floral structures or fruit coverings.
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Q.6Easy
Which of the following characteristics distinguishes bryophytes from pteridophytes?
Answer: B
Bryophytes lack true roots, stems, and vascular tissue, while pteridophytes possess true vascular tissue (xylem and phloem) and roots.
Q.7Easy
In mosses, the dominant generation is:
Answer: B
Mosses exhibit alternation of generations with the gametophyte (haploid) being the dominant, photosynthetic generation, while sporophyte is dependent.
Q.8Easy
Rhizoids in bryophytes serve primarily for:
Answer: B
Rhizoids are root-like structures that anchor bryophytes to the substrate and facilitate absorption of water and minerals.
Q.9Easy
Which of the following is NOT a characteristic of gymnosperms?
Answer: C
Gymnosperms have naked seeds not enclosed in an ovary. Seeds enclosed in an ovary is a characteristic of angiosperms.
Q.10Easy
The phenomenon where both parents contribute equally to the offspring is called:
Answer: C
Sexual reproduction involves fusion of two gametes from different parents, resulting in genetic variation and equal parental contribution in diploid offspring.
Q.11Easy
Which of the following characteristics is unique to bryophytes among all land plants?
Answer: B
Bryophytes have a dominant gametophytic generation, while the sporophyte is dependent on the gametophyte. This is unique among land plants and represents their primitive nature.
Q.12Easy
The vascular tissue in pteridophytes that transports water and minerals is composed of which cells?
Answer: B
Xylem in pteridophytes consists of tracheids and vessels. Companion cells are found only in angiosperms associated with phloem.
Q.13Easy
Which feature distinguishes gymnosperms from angiosperms?
Answer: A
Gymnosperms produce naked seeds not enclosed in a fruit and lack true flowers. Angiosperms have enclosed seeds within fruits and possess flowers.
Q.14Easy
In the alternation of generations, which phase shows maximum reduction in bryophytes?
Answer: B
In bryophytes, the sporophyte is reduced (2n generation) and dependent on the dominant gametophyte. This reflects their primitive nature in plant evolution.
Q.15Easy
Which character would you use to definitively distinguish between a monocot and dicot embryo?
Answer: A
The most definitive character for embryo classification is the number of cotyledons: monocots have one, dicots have two. This is evident even at the embryonic stage.
Q.16Easy
In the angiosperm ovule, the micropyle serves which primary function?
Answer: B
The micropyle is a small opening in the integument through which the pollen tube enters the ovule to reach the embryo sac for fertilization.
Q.17Easy
Which of the following is NOT a characteristic of monocots?
Answer: D
Monocots have ONE cotyledon, not two. Two cotyledons is a characteristic feature of dicots. Options A, B, and C are all typical monocot features.
Q.18Easy
Which of the following plant groups shows the most advanced vascular tissue organization?
Answer: C
Gymnosperms possess the most advanced vascular tissue with secondary growth, vessels in some species, and efficient water transport mechanisms compared to other groups.
Q.19Easy
In moss, the dominant generation is the gametophyte. What is the ploidy level of this structure?
Answer: B
The gametophyte generation is always haploid (n) because it develops from spores after meiosis and produces gametes through mitosis.
Q.20Easy
A student observes a plant with naked ovules and resinous cones. Which division should this plant be classified under?
Answer: C
Naked ovules (not enclosed in ovary) and cone formation are characteristic features of gymnosperms. Angiosperms have ovules enclosed in the ovary.
