Some stages of development of dicot embryo are given below :-

a. Proembryo

b. Globular stage

c. Heart shape

d. Mature embryo

Arrange the given stages in correct sequence?

1. a, b, c, d

2. c, d, b, a

3. a, c, d, b

4. b, d, c, a

In a cereal grain, the single cotyledon of the embryo is represented by:

Go through the given diagram of a typical dicot embryo. In which of the following all the 3 parts labelled as A, B, C with their respective functions are correctly identified?

 

1
A: Plumule → Shoot system formation
B: Radicle → Root system formation
C: Hypophysis → Formation of radicle

2 
A: Plumule → Shoot system formation
B: Radicle → Root system formation
C: Cotyledon → Food storage

3
A: Radicle → Root system formation
B: Plumule → Shoot system formation
C: Cotyledon → Food storage

4
A: Radicle → Root system formation
B: Plumule → Shoot system formation
C: Endosperm → Food storage

The lower end of the embryonal axis in maize has the radicle and root cap enclosed in

1. An extension of scutellum

2. A structure called coleoptile

3. A differentiated sheath

4. A structure called coleorrhiza

Identify the parts labelled A, B, C and D in the given figure and select the correct option.

The embryo of a grass seed is enclosed by two protective sheaths, a(n) _________, which covers the young shoot, and a(n) __________, which covers the young root.

1. plumule; radical

2. hypocotyl; picotyls

3. coleoptile; coleorrhiza

4. scutellum; replum

Epicotyl has a shoot apex and a few leaf primordial enclosed in a hollow foliar structure called as the:

(1) Coleoptile

(2) Coleorhiza

(3) Scutellum

(4) Perisperm

In a typical dicotyledonous embryo, the cylindrical portion below the level of cotyledons is _________ that terminates at its lower and in the ____________

1. Epicotyl, plumule

2. Epicotyl, radicle

3. Hypocotyl, radicle

4. Hypocotyl, plumule

During the development of typical embryo sac from the functional megaspore

1. The free nuclear division takes places

2. Cytokinesis is present after each karyokinesis

3. Nuclear divisions are followed immediately by cell wall formation

4. Cell walls are laid down after the 4-nucleated stage

Diagram given below shows stages in embryogenesis in a typical dicot (Capsella). Identify structures A to D respectively:

1. Suspensor, Radicle, Plumule, Cotyledons
2. Hypophysis, Radicle, Plumule, Cotyledons
3. Suspensor, Plumule, Radicle, Cotyledons
4. Suspensor, Radicule, Plumule, Hypocotyls