StudentAidUnit 9: Plant Physiology — Mcqs
9th Class Biology · Unit 9: Plant Physiology
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1.Which of the following plant nutrients is required in large amounts?
2.Which element is required by plants for the formation of chlorophyll?
3.The primary function of root hairs is:
4.Root hairs absorb salts from soil by;
5.Water moves from the soil into root cells by:
6.The transpiration is regulated by;
7.Under which condition, there will be high rate of transpiration?
8.Which ion plays a role in the opening of stomata?
9.In most plants the food is transported in the form of:
10.What is TRUE according to the pressure flow mechanism of food transport?
- a Water enters the source, creating pressure
- b Water is pulled from the sink
- c Movement of food in phloem is due to gravity.
- d Solutes move from low to high concentration
11.Succulent organs are present in:
Nutrition in Plants
12.Which of the following elements are micronutrients for plants?
13.What roles does magnesium play in plants?
Transport in Plants
14.Absorption of water molecules through root hairs is due to:
15.When you suck a cold drink using drinking straw. It resembles with:
16.Which component is not the part of the plant's vascular system?
Transportation
17.The rate of transpiration is increased when:
18.The loss of water in the form of drops from tips of leaf is called:
19.What are the roles of stomata in plants?
20.Which of the following are not types of transpiration?
Transport of Water and Salts in Plants
21.Most of the uptake of water and minerals from soil takes place through:
22.Which of the following is not function of roots in plants?
23.Which process is not involved in water transport in plants?
Gaseous Exchange
24.When the rate of photosynthesis become equal to that rate of respiration in the plant body. Which of the following pattern of gaseous exchange occurs between plant and its environment:
25.What is produced during respiration?
26.What are not the functions of leaves in plants?
Osmotic Adjustments in Plants
27.Which category of plants stores a small amount of water and has a thin cuticle?
- a Hydrophytes
- b Xerophytes
- c Mesophytes
- d Succulents
28.What is a key role of leaves in managing waste in plants?
29.Which of the following is not a characteristic of xerophyte?
30.Maintenance of internal body temperature is called:
31.The plants, which live completely or partially submerged in fresh water are:
32.All of the following are the adaptation of xerophytes except:
33.Which of the following are ways hydrophytes adapt to osmotic conditions?
Translocation of Food
34.The sugar moves through phloem is mostly in the form of:
35.What is the role of companion cells in the translocation process?
36.What drives the translocation of organic solutes in plants?
37.Pressure flow mechanism is about:
38.According to pressure-flow theory one of the following is not a sink: