Free Forms and Functions of Plants MCQs with Answers
272 Forms and Functions of Plants MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Plant nutrition and transport cover mineral uptake, photosynthesis, xylem movement of water and minerals, and phloem translocation of sugars. Plant growth regulators include auxins, gibberellins, cytokinins, abscisic acid and ethene, whose effects on cell division, elongation, dormancy, fruit ripening and tropic responses should not be confused with mineral nutrition.
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Read the Forms and Functions of Plants notesFree MDCAT chapter notes with key terms272 questions · page 11 of 14
- A. Spring variety to the winter variety
- B. Winter variety to the spring variety
- C. Winter variety to the summer variety
- D. Summer variety to the winter variety
Explanation: The term vernalization originated from the Latin word Vernalis, which means "of the spring".
Correct answer: Winter variety to the spring variety- A. 600 nm
- B. 660 nm
- C. 560nm
- D. 730 nm
Explanation: Phytochrome exists in two forms i.e. P 660 and P 730. P 660, a quiescent form, absorbs red light at a wavelength of 660 nm and is…
Correct answer: 660 nm- A. 11:00 hours
- B. 15:00 hours
- C. 11 ½ Hours
- D. 15 ½ hours
Explanation: Critical day length is the length of the light period in a 24-hour cycle required to inhibit the flowering of short-day plants.
Correct answer: 15 ½ hours- A. Abscisic acid
- B. Cytokinin
- C. Seisomonasty
- D. Demonasty
Explanation: Senescence is the aging of individual cells within an organism. The organism itself is still alive and metabolizing energy, but its cells…
Correct answer: Cytokinin- A. Shoot
- B. Flowers
- C. Leaves
- D. Base of the plant
Explanation: Auxin is a plant hormone that is primarily produced in the shoot tips and young leaves.
Correct answer: Base of the plant- A. Chlamydemonas
- B. Mimesa pudica
- C. Oxalis
- D. Crocus
Explanation: The locomotary movement of free swimming organisms or their organs in response to one-sided illumination is called phototaxis.
Correct answer: Chlamydemonas- A. Auxins
- B. Gibberellins
- C. Cytokinis
- D. Ethylene
Explanation: Ethylene is a gaseous plant hormone that helps regulate various processes in plants.
Correct answer: Ethylene- A. Cellulose
- B. Cuticle
- C. Chitin
- D. Lignin
Explanation: Cellulose is a tough, fibrous, and water-insoluble polysaccharide that plays an integral role in keeping the structure of plant cell walls…
Correct answer: Cuticle- A. Red light
- B. Blue light
- C. Sunlight
- D. Green light
Explanation: Greenlight range spectrum is considered as least effective for the process of photosynthesis: The wavelength of green light is thought to…
Correct answer: Green light- A. corymbs
- B. umbel
- C. catkin
- D. panicle
Explanation: The pedicel is a stalk or stem that supports a single flower. It connects the single flower to the inflorescence.
Correct answer: umbel- A. Xylem
- B. Collenchyma
- C. Sclerenchyma
- D. Parenchyma
Explanation: Collenchyma is living tissue that provides support to the plant as it has extra cellulose deposited in its cell wall the cell wall is…
Correct answer: Collenchyma- A. Stomata are opened
- B. Day is humid
- C. Concentration of CO2 inside the leaf is high
- D. Concentration of O2 inside leaf is high
Explanation: Photorespiration occurs when Rubisco, an enzyme involved in photosynthesis, binds with O2 instead of CO2.
Correct answer: Concentration of O2 inside leaf is high- A. Nepenthes
- B. Utricularia
- C. Dionea
- D. Sundew
Explanation: Drosera or sundew is a carnivorous plant found in moist, acidic, and nutrient-deficient soils.
Correct answer: Utricularia- A. Sugar
- B. pH
- C. Potassium
- D. All of the above
Explanation: The opening and closing of stomata are primarily controlled by the conversion of starch to sugar and vice versa in guard cells.
Correct answer: Sugar215. Mangroves are:
- A. Xerophytes
- B. Mesophytes
- C. Halophytes
- D. Hydrophytes
Explanation: Mangroves are tropical plants that are adapted to lose, wet soils, salt water and being periodically submerged by tides
Correct answer: Halophytes- A. Stoma of chloroplasts
- B. Granum of the chloroplast
- C. Cytoplasm of the cell
- D. ....
Explanation: Unlike the light reactions, which take place in the thylakoid membrane, the reactions of the Calvin cycle take place in the stroma, the…
Correct answer: Stoma of chloroplasts- A. Lateral meristem
- B. Apical meristem
- C. Intercalary
- D. None
Explanation: The meristem responsible for wood formation in plants is the lateral meristem, specifically the vascular cambium and the cork cambium.
Correct answer: Lateral meristem- A. Capillary rise of water
- B. Root pressure
- C. Tensile strength
- D. All of these
Explanation: Guttation is the process by which plants excrete excess water in the form of droplets through specialized structures called hydathodes.
Correct answer: Root pressure- A. Increase in the soil nutrient
- B. More aeration of soil
- C. Soil fertility
- D. ....
Explanation: Crop rotation helps return nutrients to the soil without synthetic inputs.
Correct answer: Increase in the soil nutrient- A. 3
- B. 5
- C. 6
- D. 7
Explanation: The ion crosses three main structures when moving from one cell to an adjacent cell in a woody plant:Middle Lamella: This is the…
Correct answer: 3