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)
Correct Answer :
A. Ovules are borne on central axis.
In parietal placentation, the ovules develop on the inner wall of the ovary or on peripheral part.
Related Questions
Cotyledons and testa respectively are edible parts in which of the following group?
walnut and tamarind
cashew nut and litchi
french bean and coconut
groundnut and pomegranate
Which one of the following structure is not associated with gynoecium?
Ovary
Style
Stigma
Filament
During the post-fertilization period, the ovules develops into ___A____ and the ovary matures into a ___B ____.
A - seeds; B - fruit
A - fruit; B - seeds
A - flower; B - seed
A - seeds; B - flower
Pollen grains are produced within _________of stamen.
ovary
anther
filament
connective
The primary roots and its branches constitute the
fibrous root system.
tap root system.
adventitious root system.
all of the above
Which of the following is a modified stem for the protection of plants from browsing animals?
Tendrils
Thorns
Rhizome
Tuber
Identify the kind of phyllotaxy shown in the given figures A, B, and C.
A-Alternate, B - Opposite, C - Whorled
A- Whorled, B - Opposite, C -Alternate
A-Alternate, B - Whorled, C - Opposite
A-Whorled, B -Alternate, C - Opposite
Consider the following statements regarding the root system of angiosperms and choose the correct option given below.
- In monocots, the fibrous root system arises from the base of the stem.
- The region of elongation is called the root hair region.
- In sweet potato, the adventitious roots get swollen and store food.
- The stems of maize and sugarcane have supporting roots called prop roots.
(i) and (ii) are correct but (iii) and (iv) are wrong.
(ii) and (iii) are correct but (i) and (iv) are wrong.
(ii) and (iv) are correct but (i) and (iii) are wrong.
(i) and (iii) are correct but (ii) and (iv) are wrong.
A branch in which each node bearing a rossette of leaves and a tuft of roots is found in aquatic plants like _________ and _________.
Hydrilla and Pistia
Eichhornia and Hydrilla
Pistia and Eichhornia
Pistia and Vallisneria
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
A scar on the seed coat through which the developing seeds attached to the fruit is called as ________.
testa
tegmen
hilum
micropyle
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.
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)
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.
It is a proteinous layer and the outer covering of endosperm which separates the embryo. Identify the layer.
Tegmen
Scutellum
Hyaline layer
Aleurone layer
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
When a flower has both androecium and gynoecium, it is known as__________.
asexual
bisexual
unisexual
multisexual
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
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)
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.
Main function of leaf is
exchange of gases
increase the beauty of a tree
manufacturing of food
nerve impulse induction
Fibrous root system is found in
monocotyledonous plants.
dicotyledonous plants.
bryophytes.
gymnosperms.
Root hairs develop from
region of maturation
region of elongation
region of meristematic activity
root cap
Read the following statements and answer the question.
- It is the pattern of arrangement of leaves on the stem or branch.
- It is usually of three types - alternate, opposite and whorled.
- It is meant for getting maximum amount of light. statements?
Phyllotaxy
Venation
Inflorescencew
Aestivation
Which type of function is performed by the fleshy leaves of onion and garlic?
Storage
Reproduction
Photosynthesis
Protection
Which of the following plants is growing in swampy areas, where many roots come out of the ground and grow vertically upwards?
Potato
Opuntia
Rhizophora
Grass
Identify the inflorescence shown by the given figures A and B.
A-Cymose, B-Racemose
A-Racemose, B-Cymose
A-Racemose, B-Racemose
A-Cymose, B-Cymose
The given figure shows the parts of mango and coconut. Choose the option which shows the correct labelling of A, B, C and D marked in the figures.
A - Epicarp, B - Mesocarp, C - Seed, D - Endocarp
A - Epicarp, B - Mesocarp, C - Ovule, D - Endocarp
A - Epicarp, B - Mesocarp, C - Ovary, D - Endocarp
A - Epicarp, B - Mesocarp, C - Embryo, D - Endocarp
The main function(s) of root system is/are
absorption of water and minerals from the soil
storing reserve food material
synthesis of plant growth regulators
All of the above
Which of the following is an example of pinnately compound leaf ?
Cucumber
Papaya
Cucurbita
Neem