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
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 |
Group-A | Group-B |
A. Aleurone layer | i. without fertilization |
B. Parthenocarpic fruit | ii. Nutrition |
C. Ovule | iii. Double fertilization |
D. Endosperm | iv. Seed |
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
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)