MCQ
Mark the correct statement for the organism given below in figure.
- AThe structure labelled $A$ is male cone
- ✓It is member of sphenopsida
- CNodes are hollow while internodes are solid
- DThis is commonly called as stonewort
✓
Answer
Correct option: B.
It is member of sphenopsida
b
This is commonly called as stonewort
This is commonly called as stonewort
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Non-essential for seed germination is
Which of the following statements are correct for gibberellins ?
(i) Spraying juvenile conifers with GAs hastens the maturity period, thus leading to early seed production.
(ii) Promotes bolting in beet, cabbages and many plants with rosette habit.
(iii) It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation.
(iv) Their ability to cause an increase in length of axis is used to increase the length of grapes stalks.
(v) It help to initiate rooting in stem cuttings.
(vi) It promote flowering eg. in pineapples.
(i) Spraying juvenile conifers with GAs hastens the maturity period, thus leading to early seed production.
(ii) Promotes bolting in beet, cabbages and many plants with rosette habit.
(iii) It helps to produce new leaves, chloroplasts in leaves, lateral shoot growth and adventitious shoot formation.
(iv) Their ability to cause an increase in length of axis is used to increase the length of grapes stalks.
(v) It help to initiate rooting in stem cuttings.
(vi) It promote flowering eg. in pineapples.
Identify the correct statements w.r.t. the given cell
→$A$. Concerned with lipid and steroidal hormone synthesis
$B$. Outer non-living rigid structure which gives shape to the cell and protects from mechanical damage and infection.
$C$. Both lie perpendicular to each other and each has an organisation like the cart wheel.
$D$. Responsible for trapping light energy for the synthesis of sugar.
$E$. Present in cells actively involved in protein synthesis and secretion.
$F$. Spherical structures, rich in hydrolytic enzymes.
Bacterial ribosomes are present
How many meiotic divisions will be necessary to produce two hundred pollen grains
Which of the following hormone is weak organic acid having unsaturated ring structures and derived from amino acid?
Which one of the following statements pertaining to plant structure is correct
Most widely used compound as a source of ethylene is
Assertion : Biotic community has higher position than population in ecological hierarchy.
Reason : Population of similar individuals remains isolated in the community.
Reason : Population of similar individuals remains isolated in the community.
Choose the wrong statement for aestivation.
(i) The mode of arrangement of sepals or petals in floral bud with respect to the other members of the same whorl is known as aestivation
(ii) In valvate aestivation sepals or petals in a whorl just touch one another at the margin, without overlapping, as in Calotropis.
(iii) In twisted aestivation, one margin of sepals or petals overlaps that of the next one and so on.
(iv) China rose, lady's finger and cotton have imbricate aestivation.
(v) In imbricate aestivation, margins of sepals or petals overlap one another but not in any particular direction.
(i) The mode of arrangement of sepals or petals in floral bud with respect to the other members of the same whorl is known as aestivation
(ii) In valvate aestivation sepals or petals in a whorl just touch one another at the margin, without overlapping, as in Calotropis.
(iii) In twisted aestivation, one margin of sepals or petals overlaps that of the next one and so on.
(iv) China rose, lady's finger and cotton have imbricate aestivation.
(v) In imbricate aestivation, margins of sepals or petals overlap one another but not in any particular direction.