259237
In Spirogyra sometimes a ladder like structure is present due to:
1 vegetative reproduction
2 asexual reproduction
3 lateral conjugation
4 scalariform conjugation
Explanation:
Sexual reproduction in spirogyra occurs by conjugation. Scalariform conjugation occurs between cells belonging to different filaments. Therefore, these species are heterogametic. Lateral conjugation is primitive compared to scolar conjugation.
JIPMER-2004
Plant kingdom
259173
Choose the correct statement.
1 Red colour of the red sea is due to dinoflagellates
2 Heterocysts of cyanobacteria fix atmospheric nitrogen.
3 Mycoplasmas are pleomorphic due to the presence of cell wall.
4 Presence of mycolic acid in the cell wall of diatoms is the reason for the left over cell deposits in large amounts in their habitats.
Explanation:
Cynobacteria include anabaena. It is able to fix nitrogen from the atmosphere. Nitrogen is changed into ammonia by it. The heterocysts present in it are specialized cyanobacterial cells for nitrogen fixation. It contains enzymes Nitrogenase. Nitrogenase is inactivated by oxygen. Hence, the heterocyst creates a micro anaerobic environment.
AP EAMCET-24.04.2019 Shift-II
Plant kingdom
259177
The characteristic feature of Ectocarpus is (I) Green, filamentous algae with simple branches (II) Cells contain chlorophyl a, d, carotenoids and xanthophylls (III) Life cycle is haplodiplontic (IV) Zoospores are pyriform with two flagella attached laterally Options:
1 I, II
2 I, III
3 III, IV
4 II, IV
Explanation:
Ectocarpus is a filamentous brown algae. Their life cycle is haplodiplontic and asexually reproduce by asexual zoospore formation which is pyriform and biflagelated flagella attaches laterally.
AP EAMCET-25.04.2018 Shift-II
Plant kingdom
259179
Which of the following shows heterotrichous habit?
1 Ectocarpus
2 Euglena
3 Ulothrix
4 Spirogyra
Explanation:
Heterotrichus condition (habit) shows in ectocarpus. It is consisting of prostrate and erect system. The filaments of the erect systemize from the filaments of prostrate system. Prostrate system consists of creeping irregularly branched filaments.
259237
In Spirogyra sometimes a ladder like structure is present due to:
1 vegetative reproduction
2 asexual reproduction
3 lateral conjugation
4 scalariform conjugation
Explanation:
Sexual reproduction in spirogyra occurs by conjugation. Scalariform conjugation occurs between cells belonging to different filaments. Therefore, these species are heterogametic. Lateral conjugation is primitive compared to scolar conjugation.
JIPMER-2004
Plant kingdom
259173
Choose the correct statement.
1 Red colour of the red sea is due to dinoflagellates
2 Heterocysts of cyanobacteria fix atmospheric nitrogen.
3 Mycoplasmas are pleomorphic due to the presence of cell wall.
4 Presence of mycolic acid in the cell wall of diatoms is the reason for the left over cell deposits in large amounts in their habitats.
Explanation:
Cynobacteria include anabaena. It is able to fix nitrogen from the atmosphere. Nitrogen is changed into ammonia by it. The heterocysts present in it are specialized cyanobacterial cells for nitrogen fixation. It contains enzymes Nitrogenase. Nitrogenase is inactivated by oxygen. Hence, the heterocyst creates a micro anaerobic environment.
AP EAMCET-24.04.2019 Shift-II
Plant kingdom
259177
The characteristic feature of Ectocarpus is (I) Green, filamentous algae with simple branches (II) Cells contain chlorophyl a, d, carotenoids and xanthophylls (III) Life cycle is haplodiplontic (IV) Zoospores are pyriform with two flagella attached laterally Options:
1 I, II
2 I, III
3 III, IV
4 II, IV
Explanation:
Ectocarpus is a filamentous brown algae. Their life cycle is haplodiplontic and asexually reproduce by asexual zoospore formation which is pyriform and biflagelated flagella attaches laterally.
AP EAMCET-25.04.2018 Shift-II
Plant kingdom
259179
Which of the following shows heterotrichous habit?
1 Ectocarpus
2 Euglena
3 Ulothrix
4 Spirogyra
Explanation:
Heterotrichus condition (habit) shows in ectocarpus. It is consisting of prostrate and erect system. The filaments of the erect systemize from the filaments of prostrate system. Prostrate system consists of creeping irregularly branched filaments.
259237
In Spirogyra sometimes a ladder like structure is present due to:
1 vegetative reproduction
2 asexual reproduction
3 lateral conjugation
4 scalariform conjugation
Explanation:
Sexual reproduction in spirogyra occurs by conjugation. Scalariform conjugation occurs between cells belonging to different filaments. Therefore, these species are heterogametic. Lateral conjugation is primitive compared to scolar conjugation.
JIPMER-2004
Plant kingdom
259173
Choose the correct statement.
1 Red colour of the red sea is due to dinoflagellates
2 Heterocysts of cyanobacteria fix atmospheric nitrogen.
3 Mycoplasmas are pleomorphic due to the presence of cell wall.
4 Presence of mycolic acid in the cell wall of diatoms is the reason for the left over cell deposits in large amounts in their habitats.
Explanation:
Cynobacteria include anabaena. It is able to fix nitrogen from the atmosphere. Nitrogen is changed into ammonia by it. The heterocysts present in it are specialized cyanobacterial cells for nitrogen fixation. It contains enzymes Nitrogenase. Nitrogenase is inactivated by oxygen. Hence, the heterocyst creates a micro anaerobic environment.
AP EAMCET-24.04.2019 Shift-II
Plant kingdom
259177
The characteristic feature of Ectocarpus is (I) Green, filamentous algae with simple branches (II) Cells contain chlorophyl a, d, carotenoids and xanthophylls (III) Life cycle is haplodiplontic (IV) Zoospores are pyriform with two flagella attached laterally Options:
1 I, II
2 I, III
3 III, IV
4 II, IV
Explanation:
Ectocarpus is a filamentous brown algae. Their life cycle is haplodiplontic and asexually reproduce by asexual zoospore formation which is pyriform and biflagelated flagella attaches laterally.
AP EAMCET-25.04.2018 Shift-II
Plant kingdom
259179
Which of the following shows heterotrichous habit?
1 Ectocarpus
2 Euglena
3 Ulothrix
4 Spirogyra
Explanation:
Heterotrichus condition (habit) shows in ectocarpus. It is consisting of prostrate and erect system. The filaments of the erect systemize from the filaments of prostrate system. Prostrate system consists of creeping irregularly branched filaments.
259237
In Spirogyra sometimes a ladder like structure is present due to:
1 vegetative reproduction
2 asexual reproduction
3 lateral conjugation
4 scalariform conjugation
Explanation:
Sexual reproduction in spirogyra occurs by conjugation. Scalariform conjugation occurs between cells belonging to different filaments. Therefore, these species are heterogametic. Lateral conjugation is primitive compared to scolar conjugation.
JIPMER-2004
Plant kingdom
259173
Choose the correct statement.
1 Red colour of the red sea is due to dinoflagellates
2 Heterocysts of cyanobacteria fix atmospheric nitrogen.
3 Mycoplasmas are pleomorphic due to the presence of cell wall.
4 Presence of mycolic acid in the cell wall of diatoms is the reason for the left over cell deposits in large amounts in their habitats.
Explanation:
Cynobacteria include anabaena. It is able to fix nitrogen from the atmosphere. Nitrogen is changed into ammonia by it. The heterocysts present in it are specialized cyanobacterial cells for nitrogen fixation. It contains enzymes Nitrogenase. Nitrogenase is inactivated by oxygen. Hence, the heterocyst creates a micro anaerobic environment.
AP EAMCET-24.04.2019 Shift-II
Plant kingdom
259177
The characteristic feature of Ectocarpus is (I) Green, filamentous algae with simple branches (II) Cells contain chlorophyl a, d, carotenoids and xanthophylls (III) Life cycle is haplodiplontic (IV) Zoospores are pyriform with two flagella attached laterally Options:
1 I, II
2 I, III
3 III, IV
4 II, IV
Explanation:
Ectocarpus is a filamentous brown algae. Their life cycle is haplodiplontic and asexually reproduce by asexual zoospore formation which is pyriform and biflagelated flagella attaches laterally.
AP EAMCET-25.04.2018 Shift-II
Plant kingdom
259179
Which of the following shows heterotrichous habit?
1 Ectocarpus
2 Euglena
3 Ulothrix
4 Spirogyra
Explanation:
Heterotrichus condition (habit) shows in ectocarpus. It is consisting of prostrate and erect system. The filaments of the erect systemize from the filaments of prostrate system. Prostrate system consists of creeping irregularly branched filaments.
