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Presence of motile stage in life cycle & requirement of water as a medium to complete life cycle is diagnostic characters of :–
- a)Thallophyta
- b)Bryophyta
- c)Pteridophyta
- d)Cryptogams
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Presence of motile stage in life cycle & requirement of water as a...
Option C is the correct answer. Pteridophyta includes all the seedless vascular plants. Characterized by the absence of flowers and seeds, these plants reproduce and disperse with the help of spores and through alternation of generations involving the spore producing plants (sporophytes) and gamete producing plants (gametophytes). The life cycle of the pteridophytes show cases a motile stage wherein the male organs (antheridia) produce numerous motile sperm or antherozoids with flagella which need the presence of continuous film of water to swim through and reach the egg cell embedded in the archegonium to enable fertilization.
Cryptogams is not the right answer as this refers to all non-seed bearing plants and plant like organism and includes algae, fungi, mosses, lichens and ferns.
Therefore, the correct answer is option C.
Cryptogams is not the right answer as this refers to all non-seed bearing plants and plant like organism and includes algae, fungi, mosses, lichens and ferns.
Therefore, the correct answer is option C.
This question is part of UPSC exam. View all NEET courses
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Presence of motile stage in life cycle & requirement of water as a...
The presence of a motile stage in a life cycle refers to the existence of a stage in which the organism is capable of moving actively. This stage is characterized by the ability to move independently, typically by means of locomotion structures such as flagella, cilia, or appendages.
The motile stage is often seen in various organisms, including protozoa, algae, fungi, and some animals. It plays a crucial role in the life cycle as it allows the organism to disperse, find food, or locate a suitable environment for growth and reproduction.
In the life cycle of many organisms, the motile stage may occur at different points. For example, in some protozoa, the motile stage is observed during the reproductive phase when the organism moves to find a mate or to disperse its offspring. In algae, the motile stage is often seen during the reproductive phase when the organism releases motile gametes for fertilization.
In animals, the presence of a motile stage is seen in various life cycles. For instance, in insects, the motile stage is prominent during the larval stage when the organism moves actively to feed and grow. In some animals, such as fish or amphibians, the motile stage is observed during the larval or juvenile stage when they actively swim or crawl to find food and suitable habitats.
Overall, the presence of a motile stage in the life cycle is essential for the organism's survival, dispersal, and reproduction. It allows the organism to actively interact with its environment and fulfill its biological needs.
The motile stage is often seen in various organisms, including protozoa, algae, fungi, and some animals. It plays a crucial role in the life cycle as it allows the organism to disperse, find food, or locate a suitable environment for growth and reproduction.
In the life cycle of many organisms, the motile stage may occur at different points. For example, in some protozoa, the motile stage is observed during the reproductive phase when the organism moves to find a mate or to disperse its offspring. In algae, the motile stage is often seen during the reproductive phase when the organism releases motile gametes for fertilization.
In animals, the presence of a motile stage is seen in various life cycles. For instance, in insects, the motile stage is prominent during the larval stage when the organism moves actively to feed and grow. In some animals, such as fish or amphibians, the motile stage is observed during the larval or juvenile stage when they actively swim or crawl to find food and suitable habitats.
Overall, the presence of a motile stage in the life cycle is essential for the organism's survival, dispersal, and reproduction. It allows the organism to actively interact with its environment and fulfill its biological needs.
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Presence of motile stage in life cycle & requirement of water as a medium to complete life cycle is diagnostic characters of :–a)Thallophytab)Bryophytac)Pteridophytad)CryptogamsCorrect answer is option 'D'. Can you explain this answer?
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Presence of motile stage in life cycle & requirement of water as a medium to complete life cycle is diagnostic characters of :–a)Thallophytab)Bryophytac)Pteridophytad)CryptogamsCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Presence of motile stage in life cycle & requirement of water as a medium to complete life cycle is diagnostic characters of :–a)Thallophytab)Bryophytac)Pteridophytad)CryptogamsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Presence of motile stage in life cycle & requirement of water as a medium to complete life cycle is diagnostic characters of :–a)Thallophytab)Bryophytac)Pteridophytad)CryptogamsCorrect answer is option 'D'. Can you explain this answer?.
Presence of motile stage in life cycle & requirement of water as a medium to complete life cycle is diagnostic characters of :–a)Thallophytab)Bryophytac)Pteridophytad)CryptogamsCorrect answer is option 'D'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Presence of motile stage in life cycle & requirement of water as a medium to complete life cycle is diagnostic characters of :–a)Thallophytab)Bryophytac)Pteridophytad)CryptogamsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Presence of motile stage in life cycle & requirement of water as a medium to complete life cycle is diagnostic characters of :–a)Thallophytab)Bryophytac)Pteridophytad)CryptogamsCorrect answer is option 'D'. Can you explain this answer?.
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