Following are Very Short Answer Questions from Junior Intermediate Botany from the chapters 5 - 8.
Q: How do liverworts reproduce vegetatively?
A: Liverworts reproduce vegetatively by Gemmae. These are produced inside Gemmae cups on the dorsal surface of the
thallus. When they detach, they germinate to produce parent gametophyte.
Q: Rearrange the following events of sexual reproduction in the sequence in which they occur in a flowering plant. Embryogenesis, Fertilisation, Gametogenesis, Pollination.
A: Pollination, Gametogenesis, Fertilisation, Embryogenesis.
Q: Which of the following are monoecious and dioecious organisms? a) Date palm b) Coconut c) Chara d) Marchantia.
A: Monoecious (Male and female sex organs in same plants) → Coconut, Chara. Dioecious (Male and female sex organs in different plants) → Date palm, Marchantia.
Q: What is the function of the 2 male gametes produced by each pollengrain in angiosperm.
A: One gamete unites with egg and produces Zygote. Another male gamete unites with secondary nucleus of produce triploid PEN (Primary Endosperm Nucleus). Later it becomes a primary endosperm cell.
Q: Explain the scope and significance of ‘Numerical Taxonomy’.
A: A branch of taxonomy that uses mathematical methods to evaluate observable differences and similarities between taxonomic groups is called numerical taxonomy. It is a kind of omega taxonomy. Now a days computer is used. The morphological characters are given codes and numbers and the data is processed to computer.
Junior Inter Botany SAQs from 5-8 Chapters
Following are important questions from Junior Intermediate Botany of AP Board of Intermediate Education. These are for short answer questions (4 marks).
Q: List the changes observed in angiosperm flower subsequent to pollination and fertilisation. (4 Marks)
A: 1. Calyx and Corolla - Fall down
2. Stamens and style - Bend down
3. Ovary - Fruit
4. Ovary wall - Pericarp
5. Ovules - Seeds
6. Integuments - Seed coats
7. Zygote - Embryo
8. Primary Endosperm cell - Endosperm
9. Remaining nucellus - Perisperm
10. Stalk of the flower - Stalk of the fruit
Q: Describe any four types of placentation found in flowering plants. (4 Marks)
A: Placentation: The arrangement of ovules attached to the placenta in the ovary is called placentation.
It can be observed if a transverse section of the ovary is seen and seen under microscope. It is 5 types.
1. Marginal Placentation: Ovules are arranged in 2 rows on the long ridge like placenta formed by the union of 2 long margins of a carpel on ventral side.
It is the characteristic feature of Fabaceae. Ex: Bean.
2. Axile Placentation: Ovules are attached to the placenta formed in the centre of the ovary with not less than 2 locules. Ex: Hibiscus, Castor, Datura, Citrus.
3. Parietal Placentation: Ovules are attached to the placenta formed on the periphery or on the inner wall of the ovary (unilocular Ex: Cucurbits or bilocular). Ex: Mustard, Argemone.
4. Free Central Placentation: Ovules are attached to the placenta in the centre of the unilocular ovary which is actually derived from multi locular ovary due to the dissolution of septa.
Ex: Dianthus, Primrose.
5. Basal Placentation: Single ovule is attached to the placenta formed at the base of unilocular ovary. Ex: Helianthus, Tagetus (Marigold).
Q: Describe in fleshy fruits you studied? (4 M)
A: The fruits in which pericarp is divisible into epicarp, mesocarp and endocarp are called fleshy fruits. The simple, fleshy fruits are divided into 5 types.
1. Berry: It is a simple fleshy superior (Brinjal, Tomato, Grapes) or inferior (Guava, Banana) fruit developing from bi or multicarpellary syncarpous gynoecium.
Its characteristic feature: Mesocary fuses with endocarp and forms pulp which encloses hard seeds.
2. Pepo: It is a simple, fleshy inferior fruit developing from tricarpellary syncarpous, unilocular ovary. Ex: Cucumber (Cucurbita ceae).
Its characteristic feature: Thalamus fuses with epicarp to form rind. Mesocarp (fleshy), endocarp (smooth) and placenta are edible.
3. Hesperidium: It is a simple, superior fruit developing from multicarpellary, synearpous multilocular,
ovary. Ex: Citrus (Rutaceae).
Its characteristic feature: Epicarp is glandular, mesocarp is papery and endocarp with juicy, sugary
hairs is edible.
4. Pome: It is a simple, fleshy, false, inferior fruit developing from bi or multicarpellary synearpous gynoecium.
Its characteristic feature: Thalamus is fleshy edible and endocarp is Cartilagenous. Ex: Apple.
5. Drupe: It is a superior single seeded fleshy fruit developing from monocarpellary, unilocular ovary. Ex: Coconut, Mango. Its characteric feature: Endocarp is stony.
Q: List the changes observed in angiosperm flower subsequent to pollination and fertilisation. (4 Marks)
A: 1. Calyx and Corolla - Fall down
2. Stamens and style - Bend down
3. Ovary - Fruit
4. Ovary wall - Pericarp
5. Ovules - Seeds
6. Integuments - Seed coats
7. Zygote - Embryo
8. Primary Endosperm cell - Endosperm
9. Remaining nucellus - Perisperm
10. Stalk of the flower - Stalk of the fruit
Q: Describe any four types of placentation found in flowering plants. (4 Marks)
A: Placentation: The arrangement of ovules attached to the placenta in the ovary is called placentation.
It can be observed if a transverse section of the ovary is seen and seen under microscope. It is 5 types.
1. Marginal Placentation: Ovules are arranged in 2 rows on the long ridge like placenta formed by the union of 2 long margins of a carpel on ventral side.
It is the characteristic feature of Fabaceae. Ex: Bean.
2. Axile Placentation: Ovules are attached to the placenta formed in the centre of the ovary with not less than 2 locules. Ex: Hibiscus, Castor, Datura, Citrus.
3. Parietal Placentation: Ovules are attached to the placenta formed on the periphery or on the inner wall of the ovary (unilocular Ex: Cucurbits or bilocular). Ex: Mustard, Argemone.
4. Free Central Placentation: Ovules are attached to the placenta in the centre of the unilocular ovary which is actually derived from multi locular ovary due to the dissolution of septa.
Ex: Dianthus, Primrose.
5. Basal Placentation: Single ovule is attached to the placenta formed at the base of unilocular ovary. Ex: Helianthus, Tagetus (Marigold).
Q: Describe in fleshy fruits you studied? (4 M)
A: The fruits in which pericarp is divisible into epicarp, mesocarp and endocarp are called fleshy fruits. The simple, fleshy fruits are divided into 5 types.
1. Berry: It is a simple fleshy superior (Brinjal, Tomato, Grapes) or inferior (Guava, Banana) fruit developing from bi or multicarpellary syncarpous gynoecium.
Its characteristic feature: Mesocary fuses with endocarp and forms pulp which encloses hard seeds.
2. Pepo: It is a simple, fleshy inferior fruit developing from tricarpellary syncarpous, unilocular ovary. Ex: Cucumber (Cucurbita ceae).
Its characteristic feature: Thalamus fuses with epicarp to form rind. Mesocarp (fleshy), endocarp (smooth) and placenta are edible.
3. Hesperidium: It is a simple, superior fruit developing from multicarpellary, synearpous multilocular,
ovary. Ex: Citrus (Rutaceae).
Its characteristic feature: Epicarp is glandular, mesocarp is papery and endocarp with juicy, sugary
hairs is edible.
4. Pome: It is a simple, fleshy, false, inferior fruit developing from bi or multicarpellary synearpous gynoecium.
Its characteristic feature: Thalamus is fleshy edible and endocarp is Cartilagenous. Ex: Apple.
5. Drupe: It is a superior single seeded fleshy fruit developing from monocarpellary, unilocular ovary. Ex: Coconut, Mango. Its characteric feature: Endocarp is stony.
10th Class - Fire in the Forest - Imp Questions
Following are some important questions from 10th Class / SSC English from the lesson Fire in the Forest (Prose). These questions are for 2 marks.
Q: What did the Forest Department officials do to stop the fire?
A: The officials of the Forest Department cleared the undergrowth and the trees and made a fireline to meet situations like this. They lighted up the counter fire along the edge of the next fire line. Then it met the
oncoming forest fire. When the two fires met, there would be nothing to burn. So both fires would subside. It was the special technique of the officials to halt the fire.
Q: How do the deer spot danger? Why was she on the alert all the time?
A: The deer's ears constantly flicker this way and that to bring them news. Their big eyes always stare into the shadows and the stripy tigery grass and their nostrills will be trembling in order to spot any danger. The hind
was on the alert all the time because of her fear of enemies like tigers and panthers.
Q: How did the deer react when she first got the smell of danger?
A: When she got the smell of danger, the deer threw up her neck and every muscle of her body became alert. She outstretched her neck and soon her eyes began to smart. She bent anxiously to her fawn. Then she clearly saw the rolling smoke.
Q: Why was the chital hind so cruel to her body? What did she do?
A: Having seen the monkeys coming back, the chital hind anticipated mortal danger to her and her body. She was panicked. She, therefore, became cruel. Immediately she nudged her baby on. She started biting him hard and nipped his soft flesh.
Q: How does the fire heal the forest land?
A: The fire reduced a part of the forest to ashes. Gradually, the ash cooled and bright emerald grass grew on the burned land and made it the best food for all the deer. New trees took root and healed the land and made it a new forest for not only the animals of the jungle but also the hunters.
Q: What did the Forest Department officials do to stop the fire?
A: The officials of the Forest Department cleared the undergrowth and the trees and made a fireline to meet situations like this. They lighted up the counter fire along the edge of the next fire line. Then it met the
oncoming forest fire. When the two fires met, there would be nothing to burn. So both fires would subside. It was the special technique of the officials to halt the fire.
Q: How do the deer spot danger? Why was she on the alert all the time?
A: The deer's ears constantly flicker this way and that to bring them news. Their big eyes always stare into the shadows and the stripy tigery grass and their nostrills will be trembling in order to spot any danger. The hind
was on the alert all the time because of her fear of enemies like tigers and panthers.
Q: How did the deer react when she first got the smell of danger?
A: When she got the smell of danger, the deer threw up her neck and every muscle of her body became alert. She outstretched her neck and soon her eyes began to smart. She bent anxiously to her fawn. Then she clearly saw the rolling smoke.
Q: Why was the chital hind so cruel to her body? What did she do?
A: Having seen the monkeys coming back, the chital hind anticipated mortal danger to her and her body. She was panicked. She, therefore, became cruel. Immediately she nudged her baby on. She started biting him hard and nipped his soft flesh.
Q: How does the fire heal the forest land?
A: The fire reduced a part of the forest to ashes. Gradually, the ash cooled and bright emerald grass grew on the burned land and made it the best food for all the deer. New trees took root and healed the land and made it a new forest for not only the animals of the jungle but also the hunters.
Subscribe to:
Comments (Atom)