StudentAidUnit 8: Unit 8: Plant Physiology — Mcqs
11th Class Biology · Unit 8: Plant Physiology
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1.Process by which water evaporates from surface of leaf primarily through stomata.
2.Through which structure does most of transpiration occurs?
3.The TACT theory primarily explains?
4.Which of the following is not a function of xylem?
5.Which of the following has a perforated cell wall?
6.Exposure to lower temperature stimulates the process of flowering in biennial or perennial plants:
7.Plants that are adapted to survive in dry conditions:
8.When sugar content in a cell increases the concentration of solute increases, what happens to the water potential?
9.In higher plant, transport of food materials occurs through;
10.The plant hormone which inhibits the stem and root growth is
11.The leaves of some hydrophytes float on the surface of water. In such a leaf, stomata are found in:
12.Mesophytes are adapted to survive in:
Nutrition in Plants
13.Which of the following does not serve as a source of energy?
14.The collective processes involved in the intake and utilization of nutrients for growth, repair and maintenance of activities in an organism is called:
15.The number of macronutrients in plants are:
16.Which nutrient is a part of ATP and plays role in promoting root growth and favours flowering in the aerial zone, is:
17.Deficiency of which nutrient leads to delayed flowering, browning and wrinkling of the leaves?
18.Dark patches are formed on the leaves due to the deficiency of:
19.Which of the following statements describe the deficiency of calcium in plants:
20.The micronutrient which is critical for nitrogen fixation, nitrogen reduction, sulfur metabolism and iron utilization is:
21.Which of the following truly describes copper as a nutrient?
22.Leaves modified into a sac, partly filled with water, numerous stiff hairs, belongs to:
Gas Exchange in Plants
23.Venous fly trap has:
24.Which plant uses odour as a chemical weapon to attracts its prey?
25.Who proposed that guard cells in leaf epidermis are solely responsible for photosynthesis?
26.Which light enhances the process of opening of stomata by acidifying the surrounding environment, promoting K+ uptake is:
27.The hormone which over rides the effects of light and CO2 concentration in stomatal movement is:
Support in Plants
28.The membrane of _____ is called tonoplast.
29.The cells that are grouped in the form of strands and cylinders, lack secondary cell walls:
30.Which of the following correctly describes the sclerenchyma tissue:
31.Which of the following does not belong to sclerenchyma cells?
Water Potential
32.Water potential is symbolized by Greek Letter psi=
33.Pure water has maximum water potential which by definition is:
34.Osmotic potential is also called:
Transport of Water
35.The steeper the potential gradient the flow of water will be:
36.Which of the following cells are the extensions of epidermal cells?
37.The pathway involving a system of adjacent cell-walls in plant roots for the transport of sap is called:
38.The cytoplasmic strands that extend through pores in adjacent cell walls of plants are:
39.The pathway in which water and minerals move via interconnected protoplasts of root cells, is called:
40.Casparian strips are hurdle in the way of:
41.Which cells does not comprise xylem tissue?
42.Which feature belongs to vessels of xylem:
43.The force which plays crucial role in maintaining continuity of water column during ascent of sap is:
44.Water molecules within xylem stick together forming an unbroken column from roots to the leaves is due to:
Translocation of Food
45.Which statement characterizes tension in TACT theory.
46.Phloem tissue comprises of:
47.The cells of phloem that transport sugars throughout the plant are:
48.Companion cells supply______ to sieve tube elements.
49.Sieve tube elements and companion cells are in communication with each other by:
50.Storage of sugars, resins, latex and mucilage takes place in:
51.The velocity of sugar movements in phloem on an average is:
52.Who proposed mass-flow hypothesis?
53.The theory which relies on the principle of osmotic pressure differences between source and sink regions is:
Growth in Plants
54.The excess glucose after respiratory needs in plants is converted into non-reducing sugar i.e.
55.The type of meristem found at the tips of roots and shoots:
56.The type of meristem separated from the apex by permanent tissues, situated at base of internodes is:
57.Which statement about lateral meristem is correct:
58.Which statement describes cork cambium:
59.Increase in the length of the plants is called:
60.The process of primary growth occurs in_____ phases.
61.The phases of primary growth in plants includes
62.Non-vacuolated, small cells, spherical nuclei in the centre of cytoplasm occurs in
63.Phase of cell elongation is characterized by:
64.Secondary growth refers to the:
65.The region of mature stem outside of vascular cambium having secondary phloem, cork cambium and cork is collectively called:
66.Annual rings are formed in plants due to the seasonal activity of__________ layer:
67.The early wood is also called:
68.Xylem and phloem are generated by:
69.Cambium is highly active during:
70.The scientific method of dating and studying tree rings is called:
71.The plant hormones which promotes cell division in cambium, inhibit growth at higher concentration and promote apical dominance are:
72.Which of the following plant growth regulator promotes bolting of rosette plants?
73.Cytokinins are characterized by:
74.Which statement is correct about ABA:
75.Ethylene is a natural product of metabolism of plants which:
Osmoregulation in Plants
76.The process by which an organism maintains a stable internal equilibrium of water and dissolved substance is:
77.A solution having reduced solute concentration relative to the intracellular environment of a cell is called:
78.If a cell is placed in a solution having high solute concentration relative to the intracellular environment of cell, what happens after sometime?
79.In which type of environment/solution, the net movement of water between the cell and the environment is zero?
80.Which statement about the Marine hydrophytes is not true/correct?
81.Which of the following categories of plants have halophytic traits tolerate high salinity?
82.Seaweeds and tape grass are examples of:
83.The plants which do not require any special adaptations to survive:
84.Which of the following is not a mesophyte?
85.Pick the succulent plant.
86.The plants inhabiting saline soil are:
87.The plants having succulent leaves of stem, grow in high concentrations of MgSO4, MgCl2 and NaCl are called:
88.Halophytes growing in marshy places near seashore form a special vegetation known as:
Thermoregulation in Plants
89.The plants of temperate regions are adapted to survive heat stress by:
90.Oaks, maples and roses are adapted to prevent ice crystal formation by:
Movements in Plants
91.The movements which occur as a curvature of whole organ towards or away from stimulus in plants are called:
92.Which of the following is not tropic movement?
93.The movement in response to touch is called:
Photoperiodism
94.Effect of photoperiodism was first studied by Garner and Allard in:
95.The quiescent form of phytochrome is:
96.Cocklebur is an example of:
97.Flowering induced by dark periods shorter than a critical length is the characteristic of:
Vernalization
98.In vernalization low temperature stimulus is received by:
99.Duration of low temperature (chilling) treatment varies from:
100.Target of florigen hormone is: