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Male gametes are flagellated in : [2015 RS]
- a)Anabaena
- b)Ectocarpus
- c)Spirogyra
- d)Polysiphonia
Correct answer is option 'B'. Can you explain this answer?
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Male gametes are flagellated in : [2015 RS]a)Anabaenab)Ectoca...
(b) Male gametes are flagellated in Ectocarpus (phaeophyceae). They possess heterokont and lateral flagella.
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Male gametes are flagellated in : [2015 RS]a)Anabaenab)Ectoca...
• Male gametes are flagellated in Ectocarpus belonging to Phaeophyceae. The flagella of male gamete plays an important role in establishing initial sexual contact with the female gamete. However in Ectocarpus the female gamete too, is flagellated but is different in structure.
In Polysiphonia (Rhodophyceae) flagellated gametes are not observed, in Anabaena sexual reproduction through gametes is absent .
•while in Spirogyra sexual reproduction takes place by conjugation wherein male gamete passes through a tube to the adjacent filament. The male gametes
here are non-flagellated and show amoeboid movement.
In Polysiphonia (Rhodophyceae) flagellated gametes are not observed, in Anabaena sexual reproduction through gametes is absent .
•while in Spirogyra sexual reproduction takes place by conjugation wherein male gamete passes through a tube to the adjacent filament. The male gametes
here are non-flagellated and show amoeboid movement.
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Male gametes are flagellated in : [2015 RS]a)Anabaenab)Ectoca...
Male Gametes in Ectocarpus are Flagellated
Ectocarpus is a brown algae belonging to the class Phaeophyceae. It is a multicellular organism with a haploid life cycle. The male and female gametophytes produce flagellated male and non-flagellated female gametes, respectively.
Reasons why male gametes in Ectocarpus are flagellated:
1. To aid in motility: Flagella are whip-like appendages that help in the movement of cells. In Ectocarpus, the flagella on the male gametes aid in their motility, enabling them to swim towards the female gametes for fertilization.
2. To overcome physical barriers: Brown algae are mainly found in marine environments, which can be challenging for fertilization due to the physical barriers such as water currents and waves. The flagella on male gametes enable them to swim towards the female gametes, overcoming these physical barriers.
3. To increase chances of fertilization: The flagella on male gametes increase their chances of fertilization by enabling them to move towards the female gametes, which are non-flagellated and stationary.
In conclusion, male gametes in Ectocarpus are flagellated to aid in their motility, overcome physical barriers, and increase their chances of fertilization.
Ectocarpus is a brown algae belonging to the class Phaeophyceae. It is a multicellular organism with a haploid life cycle. The male and female gametophytes produce flagellated male and non-flagellated female gametes, respectively.
Reasons why male gametes in Ectocarpus are flagellated:
1. To aid in motility: Flagella are whip-like appendages that help in the movement of cells. In Ectocarpus, the flagella on the male gametes aid in their motility, enabling them to swim towards the female gametes for fertilization.
2. To overcome physical barriers: Brown algae are mainly found in marine environments, which can be challenging for fertilization due to the physical barriers such as water currents and waves. The flagella on male gametes enable them to swim towards the female gametes, overcoming these physical barriers.
3. To increase chances of fertilization: The flagella on male gametes increase their chances of fertilization by enabling them to move towards the female gametes, which are non-flagellated and stationary.
In conclusion, male gametes in Ectocarpus are flagellated to aid in their motility, overcome physical barriers, and increase their chances of fertilization.
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Male gametes are flagellated in : [2015 RS]a)Anabaenab)Ectocarpusc)Spirogyrad)PolysiphoniaCorrect answer is option 'B'. Can you explain this answer?
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