A Typical Flower

Q.

What is the spike of spikelets?

Q. Which of the following parts of the flower are regarded as sterile and fertile?

1. $\begin{array}{ccc}\text{Label}& \text{Sterile}& \text{Fertile}\\ \text{A}& \text{Thalamus}& -\\ \text{B}& -& \text{Corolla}\\ \text{C}& -& \text{Carpel}\\ \text{D}& \text{Calyx}& -\end{array}$
2. $\begin{array}{ccc}\text{Label}& \text{Sterile}& \text{Fertile}\\ \text{A}& \text{Receptacle}& -\\ \text{B}& -& \text{Corolla}\\ \text{D}& \text{Calyx}& -\\ \text{E}& -& \text{Stamen}\end{array}$
3. $\begin{array}{ccc}\text{Label}& \text{Sterile}& \text{Fertile}\\ \text{A}& \text{Pedicel}& -\\ \text{C}& -& \text{Carpel}\\ \text{D}& \text{Calyx}& -\\ \text{E}& -& \text{Stamen}\end{array}$
4. $\begin{array}{ccc}\text{Label}& \text{Sterile}& \text{Fertile}\\ \text{A}& \text{Pedicel}& -\\ \text{B}& \text{Calyx}& -\\ \text{C}& -& \text{Carpel}\\ \text{E}& -& \text{Stamen}\end{array}$

Q. Select the correct option.
i) A typical flower only consists of fertile parts.
ii) Differentiation and further development of the floral primordium happens before several hormonal and structural changes are initiated.
iii) Floral buds are borne on the inflorescence axis.
iv) The distal end of the filament in a stamen is attached to the thalamus or petal.

1. All are incorrect
2. i, ii and iii are correct
3. All are correct
4. i, ii and iv are incorrect

Q. A student collected 15 stamens from various flowers of different plant species. She arranged them on a slide to observe them. Select the most probable observations.
i) All flowers had stamens of the same length.
ii) Different flowers had stamens of different shapes and lengths.
iii) All flowers had stamens attached to them in a similar fashion.

1. Only i is incorrect
2. Only ii is correct
3. All but iii are correct
4. Both ii and iii are incorrect

Q. Pair the whorls with parts.

1. Calyx
2. Corolla
3. Stamen
4. Gynoecium
5. Sepals
6. Androecium
7. Petals
8. Pistil

Q.

Match the following.
$\begin{array}{cc}Column-I& Column-II\\ \left(i\right).Calyx& 1.Whorlofcarpels\\ \left(ii\right).Corolla& 2.Whorlofstamens\\ \left(iii\right).Androecium& 3.Whorlofsepals\\ \left(iv\right).Gynoecium& 4.Whorlofpetals\end{array}$

1. (i) - 3, (ii) - 4, (iii) - 1, (iv) - 2

2. (i) - 3, (ii) - 4, (iii) - 2, (iv) - 1

3. (i) - 4, (ii) - 3, (iii) - 2, (iv) - 1

4. (i) - 1, (ii) - 2, (iii) - 3, (iv) - 4

Q.

Regarding assertion and reason, select the right option.

Assertion (A): Androecium and gynoecium are termed essential whorls.
Reason (R): The two important units of sexual reproduction namely the male and female gametes are produced by the androecium and the gynoecium respectively.

1. Both A and R are correct and R explains A

2. Both A and R are correct and R does not explain A

3. Both A and R are incorrect

4. A is correct and R is incorrect

Q.

In flowering plants, gene expression for cell differentiation is independent of environmental regulation.

1. True

2. False