A typical anther shows
a. Two lobes with two theca each
b. Each lode as dithecous
c. All cells in a given microsporangium as potential PMC
d. Thousands of micropores per microsporangium
Out of these statements
1. b is incorrect
2. a and b are correct
3. c and d are incorrect
4. a, b, c and d are correct
Assertion : Cleistogamy is advantageous to the plants.
Reason : It results in the assured seed formation even in the absence of pollinators.
1. If both Assertion & Reason are true and the Reason is the correct explanation of the Assertion.
2. If both Assertion & Reason are true but the Reason is not the correct explanation of the Assertion
3. If Assertion is a true statement but Reason is false.
4. If both Assertion and Reason are false.
Match the following :
Column I | Column I | ||
(I) | External fertilization | (i) | pollen grain |
(II) | Androecium | (ii) | anther wall |
(III) | Male gametophyte | (iii) | algae |
(IV) | Primary parietal layer | (iv) | stamens |
1. I-iv; II-i; III-ii; IV-iii
2. I-iii; II-iv; III-i; IV-ii
3. I-iii; II-iv; III-ii; IV-i
4. I-iii; II-i; III-iv; IV-ii
From the statements given below choose the option that are not true for a typical female gametophyte of a flowering plant:
(i) It is 8-nucleate and 7-celled at maturity
(ii) It is cellular during the development
(iii) It is situated inside the nucellus
(iv) It has an egg apparatus situated at the chalazal end
1. i and iv
2. ii and iii
3. i and ii
4. ii and iv
From the statements given below choose the option that is true for a typical female gametophyte.
i. | It is eight-nucleate and seven-celled at maturity. |
ii. | It is free-nuclear during the development. |
iii. | It is situated inside the integument, but outside the nucellus. |
iv. | It has an egg apparatus situated at the chalazal end. |
1. (i) and (iv)
2. (ii) and (iii)
3. (i) and (ii)
4. (ii) and (iv)
From the statements given below, choose the option that is true for a typical female gametophyte of a flowering plant:
i. | It is 8-nucleate and 7-celled at maturity |
ii. | It is free-nuclear during the development |
iii. | It is situated inside the integument but outside the nucellus |
iv. | It has an egg apparatus situated at the chalazal end |
1. | i and iv | 2. | ii and iii |
3. | i and ii | 4. | ii and iv |
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 |
From the statements given below choose the option that are not true for a typical female gametophyte of a flowering plant:
(i) It is 8-nucleate and 7-celled at maturity
(ii) It is cellular during the development
(iii) It is situated inside the nucellus
(iv) It has an egg apparatus situated at the chalazal end
1. i and iv
2. ii and iii
3. i and ii
4. ii and iv
From the statements given below choose the option that are not true for a typical female gametophyte of a flowering plant:
(i) It is 8-nucleated and 7-celled at maturity
(ii) It is cellular during the development
(iii) It is situated inside the nucellus
(iv) It has an egg apparatus situated at the chalazal end
1. i and iv
2. ii and iii
3. i and ii
4. ii and iv
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)