Biology

Plant Transport and Physiology

2,012 Questions

Access a comprehensive set of questions on plant transport mechanisms and physiological adaptations. Topics include water movement, translocation of food, and plant responses to external stimuli. These biology questions are essential for medical entrance exams and other science competitive tests.

Xylem and phloem transportTranspiration and evaporationPlant adaptationsGeotropic and phototropic responsesWater absorption by rootsRespiration in roots

Plant Transport and Physiology Questions

Multiple choice

What is the function of stipule in plants?

  1. Photosynthesis

  2. Mechanical support

  3. Protection

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Stipules perform all the functions, i.e. photosynthesis, support and protection, depending upon the way they are modified.

Multiple choice

The plants secrete their wastage in the form of

  1. gum & resins

  2. oxygen

  3. carbon dioxide

  4. None of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Plants excrete waste materials in solid or semi-solid forms like gums, resins, latex, and rubber. These substances are byproducts of plant metabolism that are stored in specialized cells or ducts. Oxygen and carbon dioxide are involved in gas exchange, not excretory waste secretion in this context.

Multiple choice

Which one of the following structural components of cell wall of fruits is commercially valuable for the manufacture of food jellies?

  1. Cellulose

  2. Hemicellulose

  3. Lignin

  4. Pectin
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Pectin is a polysaccharide found in plant cell walls, especially in fruits. It has excellent gelling properties when heated with sugar and acid, making it ideal for making jellies and jams. Commercial pectin is extracted primarily from citrus peels and apple pomace.

Multiple choice

Which of the following statements is/are false? a. The process of diffusion is a slow process. b. Xylem and phloem are present in all parts of the plant body. c. Movement of minerals and water takes place from the leaves to the other parts of plants.

  1. Only a

  2. Both a and b

  3. Only c

  4. Only b and c

  5. Only b
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct option as this statement is false. Movement of minerals and water does not take place from the leaves to the other parts of plants.

Multiple choice

The function of guard cells is

  1. the exchange of gases CO2 and O2

  2. that it regulates rate of transpiration

  3. both (1) and (2)

  4. neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Yes, regarding guard cells both the above options are correct.

Multiple choice

Which plant structures have adaptations that enable them to delay growth when conditions are unfavorable?

  1. Xylem and phloem

  2. Flowers and leaves

  3. Seeds and nuts

  4. Seeds and buds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A bud is an undeveloped or embryonic shoot and normally occurs in the axil of a leaf or at the tip of the stem. Once formed, a bud may remain for some time in a dormant condition, or it may form a shoot immediately where as a seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food. It is the product of the ripened ovule of gymnosperm and angiosperm plants which occurs after fertilization and some growth within the mother plant.

Multiple choice

The plants which grow in acidic soils are called

  1. halophytes

  2. oxylophytes

  3. chasmophytes

  4. psammophytes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Oxylophytes are plants adapted to grow in acidic soils. Halophytes grow in saline conditions, chasmophytes grow in rock crevices, and psammophytes grow in sandy areas.