Free Central Placentation

Q. Primrose exhibit which type of placentation?

1. Marginal
2. Axile
3. Free central
4. Basal

Q.

Mark the incorrect statement about sexual reproduction in angiosperms.

1. Outer three layers of anther wall are protective in function
2. Cells of tapetum and endothecium show increase in DNA contents by endomitosis and polyteny
3. Sporogenous tissue, occupies the centre of each microsporangium
4. Ploidy level of microspore tetrad is haploid

Q. A protein-rich aleurone layer is found in some cereals. To which of the following parts of a plant, does it relate best?

1. Endosperm
2. Zygote
3. Testa
4. Tegmen

Q. Primrose exhibit which type of placentation?

1. Marginal
2. Axile
3. Free central
4. Basal

Q.

Select the correct statements among the four (i - iv) given below:

(i) The flower with inferior ovary is said to be hypogyous

(ii) The corolla in pea flower shows vexillary aestivation

(iii) The stamens in citrus are in polyadelphous condition

(iv) In mustard, the type of placentation is axile

1. (ii) and (iii)

2. (iii) and (iv)

3. (i) and (iv)

4. (i) and (ii)

Q. Pome of apple is developed from

Q. Primrose exhibit which type of placentation?

1. Marginal
2. Axile
3. Free central
4. Basal

Q.

Find out the correctly matched pairs as to aestivation of petals: (i) Valvate-Calotropis, (ii) Twisted-Bean (iii) Imbricate - Cassia (iv) Vexillary-China Rose.

1. i and ii
2. iii and iv
3. i and iii
4. ii and iii
5. ii and iv

Q. WhaT is semi-technical description of flowering plant?

Q. Anthesis is

1. Opening of floral bud
2. Maturation of anthers
3. Development of anthers
4. Reception of pollen by stigma

Q. Two mark Questions:
Banana is a parthenocarpic fruit whereas oranges show polyembryony.How are they different from each other with respect to seeds?

Q.

The placenta is in centre in which of these plants?

1. Argemone

2. Marigold

3. Dianthus

4. Mustard

Q.

The placenta is in centre in which of these plants?

1. Argemone

2. Marigold

3. Dianthus

4. Mustard

Q. Type of aestivation shown in Pisum is

1. Vexillary
2. Quincuncial
3. Imbricate
4. Twisted

Q. Free-central placentation is found in

1. Citrus
2. Dianthus
3. Argemone
4. Brassica

Q.

Select the correct statements among the four (i - iv) given below:

(i) The flower with inferior ovary is said to be hypogyous

(ii) The corolla in pea flower shows vexillary aestivation

(iii) The stamens in citrus are in polyadelphous condition

(iv) In mustard, the type of placentation is axile

1. (i) and (ii)

2. (ii) and (iii)

3. (iii) and (iv)

4. (i) and (iv)

Q. Which one of the following organisms is correctly matched with its three characteristics?

1. Pea- $C_3$-pathway, endospermic seed, vexillary aestivation
2. Tomato- twisted aestivation, axile placentation, berry
3. Onion- Bulb, Imbricate aestivation, axile placentation
4. Maize- $C_3$-pathWay, closed vascular bundle, scutellum

Q. Abnormal secondary growth occurs in

1. Cucurbita
2. Sunflower
3. Hordeum
4. All of the above

Q. The plant having monaldelphous stamens and axile placentation is?

1. China Rose
2. Pea
3. Lemon
4. Cucumber

Q. The immature banyan fruit is a

1. Bypanthodium inflorescence
2. Capsule
3. Samara
4. Berry

Q. An anther dehiscing towards the centre of the flower is known as

1. Introse
2. None of the above
3. Both A and B
4. Extrose

Q. An example of axile plantation is -

1. Marigold
2. Argemone
3. Dian thus
4. Lemon

Q. Lateral dehiscence can be seen in

1. Latrose
2. Valvular
3. Extrose
4. None of the above

Q. Free-central placentation is found in

1. Brassica
2. Citrus
3. Dianthus
4. Argemone