Identify two correct characteristic features of (P) Autogamy and (Q) Allogamy from the following statements
1. Plant species usually does not depend on external agents
2. Plant species usually depends on external agents
3. Plant species normally produces progeny that are healthier and better adapted in nature
4. Plant species normally produces weaker progeny in several generations
1. P-1,3; Q-2,4
2. P-2,4; Q-1,3
3. P-1,4; Q-2,3
4. P-2,3; Q-1,4
Which process is matched with a valid example?
Process | Example |
1. seed dispersal | a stamen explodes in the wind |
2. fertilization | a nucleus from the pollen grain fuses with a nucleus in the ovule |
3. fertilization | a bee carries pollen from flower to flower |
4. pollination | seeds are blown from a flower onto another one by the wind |
Match the two columns that represent plant organs (I) and parts within these organs (II).
Column I | Column II |
A. Carpel | (i) calyx, corolla |
B. Perianth | (ii) Vegetative cell, generative cell |
C. Microsporocyte | (iii) Stigma, style, ovary |
D. Megasporocyte | (iv) Antipodal cells, polar nuclei, synergid cell |
1. A-(i); B-(iii); C-(ii); D-(iv)
2. A-(iii); B-(iv); C-(i); D-(ii)
3. A-(i); B-(iii); C-(iv); D-(ii)
4. A-(iii); B-(i); C-(ii); D-(iv)
Choose the correct match with respect to ploidy level in angiosperms :
1. Synergids - Triploid (3n)
2. Antipodal cells - Triploid (3n
3. Secondary nucleus- Diploid (2n)
4. Egg cell - Diploid (2n)
Read the two statements A & B given below and select the correct option :
A- Embryo sac of angiosperms is a 7 celled structure.
B – Embryo sac has three synergid cells.
1. Both A and B are correct
2. Both A and B are incorrect
3. Only A is correct
4. Only B is correct
Match Column I with Column II and select the correct option using the codes given below:
Column I |
|
Column II |
|
A. |
Pistils fused together |
1. |
Gametogenesis |
B. |
Formation of gametes |
2. |
Pistillate |
C. |
Hyphae of higher ascomycetes |
3. |
Syncarpous |
D. |
Unisexual female flower |
4. |
Dikaryotic |
Codes:
A |
B |
C |
D |
|
1. |
4 |
3 |
2 |
1 |
2. |
2 |
1 |
4 |
3 |
3. |
1 |
2 |
4 |
3 |
4. |
3 |
1 |
4 |
2 |
स्तंभ II के साथ स्तंभ I का मिलान करें और नीचे दिए गए संकेतों का उपयोग करके सही विकल्प चुनें:
स्तंभ I |
|
स्तंभ II |
|
A. |
स्त्रीकेसर एक साथ संगलित |
1. |
युग्मकजनन |
B. |
युग्मकों का गठन |
2. |
स्त्रीकेसरी |
C. |
उच्च एस्कोमाइसिटीज के कवक तंतु |
3. |
युक्तांडपी |
D. |
उभयलिंगी मादा पुष्प |
4. |
द्विकेंद्रकी |
Codes:
A |
B |
C |
D |
|
(1) |
4 |
3 |
2 |
1 |
(2) |
2 |
1 |
4 |
3 |
(3) |
1 |
2 |
4 |
3 |
(4) |
3 |
1 |
4 |
2 |
Assertion (A): | Hybrids are widely used in cultivation to increase productivity and apomixes can be an important tool for maintaining hybrid nature. |
Reason (R): | Seeds produced by apomictic plants are identical to mother plant as there is no segregation |
1. | Both (A) & (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) & (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true statement but (R) is false. |
4. | Both (A) and (R) are false statements. |
Group-A | Group-B |
A. Aleurone layer | i. without fertilization |
B. Parthenocarpic fruit | ii. Nutrition |
C. Ovule | iii. Double fertilization |
D. Endosperm | iv. Seed |
Assertion (A): | The megaspore mother cell divide mitotically to produce four spores. |
Reason (R): | Megaspore mother cells are diploid and megaspore is haploid. |
1. | Both (A) & (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) & (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) is false but (R) is true. |
Assertion (A): | Nocturnal flowers are pollinated by moths. |
Reason (R): | Nocturnal flowers are highly fragrant and dull in colour |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A) |
2. | Both (A) and (R) are true and (R) is not the correct explanation of (A) |
3. | (A) is true, (R) is false |
4. | (A) is false and (R) is false |