When a flower has both androecium and gynoecium, it is known as__________.
asexual
bisexual
unisexual
multisexual
Correct Answer :
B. bisexual
When both the essential whorls are present in the same flower, it is described as bisexual, e.g., cruciferae, malvaceae etc.
Related Questions
Which of the following is the green expanded part of leaf with vein and veinlets?
Petiole
Node
Stipule
Lamina
How many plants in the list given below have marginal placentation?
- Mustard
- Gram
- Tulip
- Asparagus
- Arhar
- Sunhemp
- Chilli
- Colchicine
- Onion
- Moong
- Pea
- Tobacco
- Lupin
Four
Five
Six
Three
Study the following statements and select the correct option
- Buds are present in axil of leaflets of the compound leaf.
- Pulvinus leaf-base is present in some leguminous plants.
- In Alstonia, the petioles expand, become green and synthesize food.
- Opposite phyllotaxy is seen in guava.
(ii) and (iv) are correct but (i) and (iii) are incorrect.
(i) and (iii) are correct but (ii) and (iv) are incorrect.
(i) and (iv) are correct but (ii) and (iii) are incorrect.
(ii), (iii) and (iv) are correct but (i) is incorrect.
The region of the root-tip which is involved in the formation of root hairs by epidermal cells is called the
region of maturation.
region of meristematic activity.
region of elongation.
none of the above.
X is the outermost whorl of the flower and contains Y. Y is green, leaf like and protect the other whorls of the flower. Identify X and Y.
X - Calyx; Y - Sepals
X - Corolla; Y - Petals
X - Gynoecium; Y - Fruit
X - Androecium; Y - Ovary
Matching colmun I with column II and choose the correct option.
| Column I | Column II |
|---|---|
| A. Coleorhiza | I. Grapes |
| B. Food storing tissue | II. Mango |
| C. Parthenocarpic fruit | III. Maize |
| D. Single seeded fruit | IV. Radicle developing from monocarpellary superior ovary |
| E. Membranous | V. Endosperm seed coat |
A III, B I, C IV, D II, E V
A IV, B II, C V, D I, E III
A V, B I, C III, D IV, E II
A IV, B V, C I, D II, E III
The given figures (A & B) show two types of compound leaves. Choose the option which identity the correct compound leaf and their example (c).
A - Pinnately compound leaf, C - Neem
A - Palmately compound leaf, C - Neem
B- Pinnately compound leaf, C - Silk cotton
B- Palmately compound leaf, C - Silk cotton
In flower (X), the gynoecium occupies the highest position while the other parts are situated below it. The ovary in such flowers is said to be Y. Identify X and Y and select the correct option.
X - Epigynous, Y - Inferior
X - Perigynous, Y - Superior
X - Hypogynous, Y - Superior
X - Perigynous, Y - Half-inferior
The part of the root which is most active in water absorption is called
root cap
maturation zone
meristematic zone
zone of elongation
Which of the following option shows the correct labelling of the parts of leaf marked as A, B, C and D.
A - Lamina, B - Axillary bud, C - Stipule, D - Leaf base
A - Lamina, B - Stipule, C - Axillary bud, D - Leaf base
A - Lamina, B - Axillary bud, C - Stipule, D - Pedicel
A - Leaflet, B - Axillary bud, C - Stipule, D - Leaf base
Pollen grains are produced within _________of stamen.
ovary
anther
filament
connective
Which of the following statement(s) is/are correct about calyx?
Calyx is the outermost whorl of the flower and are called sepals.
Sepals are green, leaf like and protect the flower in the bud stage.
The calyx may be gamosepalous (sepals free) or polysepalous (sepals united).
Both (a) and (b)
Stilt roots occur in __________ .
groundnut
rice
sugarcane
wheat
Which one of the following characteristics does not belong to parietal placentation?
Ovules are borne on central axis.
Ovary is one-chambered but it becomes two-chambered due to the formation of false septum.
Examples are mustard and Argemone.
Both (b) and (c)
A sterile stamen is known as
staminode
anther
pollen grain
filament
Which type of function is performed by the fleshy leaves of onion and garlic?
Storage
Reproduction
Photosynthesis
Protection
Which of the following is a modified stem for the protection of plants from browsing animals?
Tendrils
Thorns
Rhizome
Tuber
Match the following placentation types given in column I with their examples given in column II and choose the correct combination from the options given below.
| (Placentation Types) | (Examples) |
|---|---|
| A. Basal | I. Dianthus |
| B. Free central | II. Pea |
| C. Parietal | III. Lemon |
| D. Axile | IV. Marigold |
| E. Marginal | V. Argemone |
A I, B II, C III, D IV, E V
A II, B III, C IV, D V, E I
A IV, B I, C V, D III, E II
A IV, B III, C V, D I, E II
Root hairs develop from
region of maturation
region of elongation
region of meristematic activity
root cap
Match column I with column II and choose the correct combination from the options given below.
| (Position of floral parts on thalamus) | (Represented in) |
|---|---|
| A. Hypogynous | I. Ray florets of sunflower |
| B. Perigynous | II. Brinjal |
| C Epigynous | III Peach |
A II, B I, C III
A I, B II, C III
A III, B II, C I
A II, B III, C I
Match the column I with column II and choose the option which shows their correct match.
| Column I | Column II |
|---|---|
| A. Placentation | (i) Arrangement of flowers on the rachis |
| B. Aestivation | (ii) Modified shoot for sexual reproduction |
| C. Inflorescence | (iii) Arrangement of various whorls in the bud |
| D. Flower | (iv) Arrangement of ovules within an ovary |
A - (i), B - (ii), C - (iii), D - (iv)
A - (iii), B - (i), C - (ii), D - (iv)
A - (iii), B - (i), C - (iv), D - (ii)
A - (iv), B - (iii), C - (i), D - (ii)
A scar on the seed coat through which the developing seeds attached to the fruit is called as ________.
testa
tegmen
hilum
micropyle
Match column - I, II and III and choose the correct option.
A - V, t; B - II, s; C -I, r; D -III, q; E -IV, p
A - I, t; B - II, s; C - III, r; D - IV, p; E - V, q
A - V, p; B - II, s; C - I, q; D - III, r; E - IV, t
A - V, p; B - III, q; C - II, s; D - I, t; E - IV, r
Which one of the following statement is correct?
Bulb of Allium cepa is a modified stem.
Cloves of Allium sativum are fleshy scale leaves.
Corm of Colocasia is a modified root.
Tendril in Vitis vinifera is a modified axillary bud.
Rearrange the following zones seen in the regions of root tip and choose the correct option.
(A) Root hair zone
(B) Zone of meristems
(C) Root cap zone
(D) Zone of maturation
(E) Zone of elongation
C, B, E, A, D
A, B, C, D, E
D, E, A, C, B
E, D, C, B, A
The main purpose of phyllotaxy for the leaves is to provide sufficient_______.
soil
air
water
light
Fibrous root system is better adopted than tap root system for
transport of organic matter.
absorption of water and minerals.
storage of food.
anchorage of plant to soil.
Read the following statements and answer the questions.
- Gynoecium is situated in the centre and other parts of the flower are located on the rim of the thalamus almost at the same level.
- Ovary is half-inferior.
- Examples are plum, rose and peach.
Which condition of flowers is being described by the above statements ?
hypogyny
perigyny
epigyny
none of these
The given figures (A and B) shows the modificaiton of roots.Which of the following statements regarding the figures is correct ?
Tap roots of carrot, turnip and adventitious root of sweet potato, get swollen and store food.
Pneumatophores conducts water, minerals & photosynthesis
Pneumatophore is found in the plants that grow in sandy soil.
Turnip & carrot shows adventitious roots and sweet potato shows tap root.
Which one of the following structure is not associated with gynoecium?
Ovary
Style
Stigma
Filament