Adaptations of Plants
Trending Questions
What is the habitat of the cactus?
Give reason: It is hard to pull out the husk of a coconut
Which one of the following is a xerophytic plant in which the stem is modified into the flat green and succulent structure?
Opuntia
Acacia
Hydrilla
Casuarina
Differentiate between Hydrophytes and Xerophytes .
Give reason for the following:
In some xerophytes leaves are modifies into spines.
Name the following :
Stomata are absent in this plant.
Draw a diagrammatic sketch of oxygen cycle in nature.
A species is a group of populations which are capable of interbreeding.
True
False
Velamen tissue is found in what type of plants?
Mesophytes
Epiphytes
Hydrophytes
Xerophytes
Some desert plants have very small leaves whereas some others have only spines. How does this benefit the plants?
What is the botanical name of the vegetable, ladys finger?
Passive absorption of water by the root system is the result of
Forces created in the cells of the root
Tension on the cell sap due to transpiration
Osmotic force in the shoot system
Increased respiratory activity in root cells
Are pineapples xerophytes?
Water hyacinth float on water surface. Why?
- True
- False
Cacti survive in a desert because:
a. It has a flat green stem to store water and prepare food by photosynthesis.
b. The stem is covered with a thick layer, which helps to preserve water.
c. Its roots are distributed on the surface to absorb water.
d. Leaves are modified into spines to prevent loss of water.
Both a and d are correct
Both a and b are wrong
Both b and c are wrong
a is wrong but b is correct
What are succulents ?
1.Thallophytes are predominantly aquatic
2.Plants have a well defined body design
3.The plants of this group are called algae
which of the above are true
a.1 and 2
b.2 and 3
c.3 only
d.1 and 3
Question 36 (e)
Fill in the blanks
A student had collected some plant samples From a pond during the field visit under a microscope he/she observed that they do not have a well_differentiated body design, To which group of plantae they belong to?
A scientist who wish to study the viral effect on plants should exclude
Cortex
Pith
Shoot apex
Phloem
Different types of interactions and the nature of interactions between species A and B are given in column I and II respectively. Choose the correct answer from the answer key where they are matched.
Column IColumn IIA. Mutualismp. Beneficial to A no effect for BB. Competitionq. Beneficial to both A and BC. Parasitismr. beneficial to A and harmful for BD. Predations. Beneficial to A and harmful to BE. Commensalismt. Harmful to both A and B
A- p, B- r, C- q, D- t, E- s
A- t, B-s, C-p, D-q, E-r
A-q, B- t, C-s, D-r, E-p
A- r, B-p, C-q, D-s, E-t
I. Xerophytes are adapted to survive in hot deserts where there is very little water.
II. Xerophytes can be found in the snow covered Alps and the icy Arctic.
III. Xerophytes are common in coastal areas and thrive in saline water.
Why are the leaves of Vallisneria thin and long?
- To minimize the damage by strong water currents
- To maximize the absorption of sunlight
- To help the leaves grow faster
- To help the leaves float in water
Plants growing in shady regions are _____.
(i) Leathery surface
(ii) Large surface area
(iii) Waxy cuticle
(iv) Sunken stomata on upper epidermis
- (i), (ii) and (iv)
- (i) and (iii)
- (i), (iii) and (iv)
- (i) and (iv)
- Hydrophytes
- Xerophytes
- Mesophytes
- Pteridophytes
In some xerophytes leaves are modified into spines.
