Which of the following is a characteristic feature of gymnosperms?
The gymnosperms are homosporous
The male and female gametophytes do not have independent free living existence
The sporophyte is dependent on the gametophyte
The ovules are enclosed by the ovary
The ovules are enclosed by the ovary
B.
The male and female gametophytes do not have independent free living existence
The gymnosperms are heterosporous. The male and female gametophytes do not have independent free living existance. Ovules are not enclosed by ovary, in gymnosperms. Pollengrains released from microsporangium. The diploid sporophyte is dominant.
Pick out the wrong statement
Gymnosperms lack vessels in their xylem
The cell wall of parenchyma is made up of pectin
The first formed primary xylem elements are called protoxylem
Gymnosperms have albuminous cells and have sieve
cells in their phloem
Gymnosperms have albuminous cells and have sieve
cells in their phloem
Which of these is an example for a zygomorphic flower with diadelphous stamens and marginal placentation?
Pea
Lemon
Brinjal
Cucumber
Cucumber
Match the modification in Column I with the part modified in Column II and choose the right option.
| Column I | Column II |
| 1. Pneumatophores in Rhizophora | A. Axillary buds |
| 2. Tendrils in pea | B. Roots |
| 3. Thorns in Citrus | C. Leaves |
1 - B; 2 - A; 3 - C
1 - C; 2 - A; 3 - B
1 - C; 2 - B; 3 - A
1 - B; 2 - C; 3 - A
1 - B; 2 - C; 3 - A
Select the wrong statement
Indigofera is used as a dye
Ashwagandha is a medicinal plant
Seeds are non-endospermous in Fabaceae
Leaves are alternate, simple and exstipulate in Solanaceae
Leaves are alternate, simple and exstipulate in Solanaceae
Which of the following prokaryotic structures has all the below mentioned roles?
i. They help in respiration
ii. They help in cell wall formation
iii. They help in DNA replication
iv. They increase surface area of plasma membrane.
Chromosome
Ribosome
Mesosome
Lysosome
Lysosome
Lenticels are involved in
Photosynthesis
Food transport
Conduction of water
Transpiration
Transpiration
Select the characters which are not applicable to the anatomy of dicot roots?
(A) Conjunctive tissue present
(B) Presence of protein compounds in the Casparian strips
(C) Polyarch xylem bundles
(D) Presence of pericycle
(A) and (B)
(B) and (D)
(C) and (D)
(A) and (D)
(A) and (D)
Match the following.
| Column I | Column II |
| A. Collenchyma | 1. Specialized epidermal cells |
| B. Subsidiary cells | 2. Mechanical support for growing plants |
| C. Casparian strips | 3. Mesophyll tissue of dicot leaf |
| D. Spongy parenchyma | 4. Suberin deposition in the radial walls of endodermis |
A - 2; B - 1; C - 4; D - 3
A - 2; B - 3; C - 4; D - 1
A - 1; B - 2; C - 3; D - 4
A - 4; B - 1; C - 2; D - 3
A - 4; B - 1; C - 2; D - 3
Consider the following statements with respect to angiosperms
(A) The male sex organ in a flower is the stamen
(B) The anthers following mitosis produce pollen grains
(C) In an embryosac, the primary endosperm nucleus (PEN) is diploid
(D) After double fertilization the ovules develop into seeds and ovaries develop into fruit.
Of the above statements
(C) and (D) are correct
(A) and (B) are correct
(A) and (C) are correct
(A) and (D) are correct
(A) and (D) are correct
