Question : The structure that produces and holds sperm cells in bryophytes (non-vascular plants) and ferns is called:
Option 1: megasporangia
Option 2: archegonium
Option 3: antheridium
Option 4: protonema
Correct Answer: antheridium
Solution : The correct answer is antheridium.
In bryophytes (non-vascular plants) and ferns, the structure that produces and holds sperm cells is called antheridium. Antheridia are the male reproductive organs responsible for the production and release of sperm cells in these plant groups. The antheridium is a pouch-like male reproductive structure in various nonflowering plants, including fungi, mosses and ferns. Attached to the gametophyte by a slender stalk, it plays a crucial role in spermatogenesis—the process of producing sperm cells.
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Question : Which plants are included in Thallophyta?
Option 1: Ulva, Chara and Cladophora
Option 2: Lichens, vascular plants and Pteridophyta
Option 3: Rose, lotus, and Lichens
Option 4: Nostoc, Rose, and Melon
Question : The kidney-shaped guard cells are present in which of the following?
Option 1: Dicot plants
Option 2: Monocot plants
Option 3: Both of the above
Option 4: Algae
Question : Which among the following are called the amphibians of the plant kingdom?
Option 1: Gymnosperms
Option 2: Pteridophytes
Option 3: Bryophytes
Option 4: Liverworts
Question : During fertilisation in living beings, the fusion of male and female gametes takes place to form a cell called:
Option 1: Zygote
Option 2: Ovum
Option 3: Embryo
Option 4: Sperm
Question : Grey hair is caused due to
Option 1: ageing of epidermal cells
Option 2: death of dermal cells
Option 3: loss of sebum in epidermal cells
Option 4: loss of melanin in epidermal cells
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