This set of Plant Biotechnology Multiple Choice Questions & Answers (MCQs) focuses on “Plant Anatomy and Morphology”.
1. In angiosperms, xylem is made up of ________
a) Vessels and fibers
b) Fibers and Tracheids
c) Tracheids, vessels, and fibers
d) Sieve elements and tracheids
View Answer
Explanation: In angiosperms, xylem is made up of vessel components, tracheids and fibers. Fibers provides support to the xylem. Sieve elements are not a part of the xylem as they are found in the phloem.
2. Why is grafting not possible in monocots?
a) Because they are herbaceous
b) Because they lack cambium
c) Because they do not have venation
d) Because they have parallel venation
View Answer
Explanation: Grafting is the technique of joining two or more plant parts so that they appear to grow as a single plant. Cambium helps in uniting two parts of the stem and monocots do not have cambium. Thus, grafting is not possible in monocots.
3. Which is the living part of xylem?
a) Tracheids
b) Fibers
c) Sieve elements
d) Parenchyma
View Answer
Explanation: Living part of xylem tissue is parenchyma. Tracheids and fibers are dead tissue. Sieve elements are not a part of xylem. It is a part of phloem.
4. By which cells radial conduction of water takes place?
a) Xylem
b) Parenchyma cells
c) Ray parenchyma cells
d) Tracheids
View Answer
Explanation: Radial conduction of water is the conduction of water in the horizontal direction through the xylem. This type of conduction occurs by ray parenchyma cells of xylem and not by any other part of xylem.
5. Where are stomata present in the lotus?
a) Upper surface
b) Both upper and lower surface
c) Lower surface
d) Absent
View Answer
Explanation: In plants with floating leaves, stomata are present on the upper surface of the leaves because if the stomata is present on the upper surface then proper exchange of gas will take place and thus, transpiration can occur.
6. Anticlinal division is parallel to the adjacent layer of the cells.
a) True
b) False
View Answer
Explanation: Anticlinal division is perpendicular to the adjacent layer of cells. Periclinal division is parallel to the adjacent layer of the cells. This type of division helps in increasing the girth of the plant part.
7. Vascular bundle present on the same radius is known as _______
a) Radial
b) Concentric
c) Collateral
d) By collateral
View Answer
Explanation: Vascular bundle includes one xylem and one phloem. When the phloem is present external to the same radius of xylem then it is called a collateral vascular bundle. Cambium may or may not be present between the xylem and phloem.
8. What is the study of the age of the tree by counting the number of annual rings called?
a) Physiology
b) Dendrochronology
c) Developmental Biology
d) Botany
View Answer
Explanation: Dendrochronology is the study of the age of the tree by counting the number of annual rings. Developmental Biology helps in knowing the various phase of growth and development in plants and animals.
9. Choose the right option for Casparian Strips.
a) Tissue found on the wall and sides of the endodermis of the roots.
b) Tissue found on the radial sides of the endodermis
c) Tissue found on the lateral sides of endodermis
d) Tissue found on the longitudinal walls of xylem
View Answer
Explanation: Casparian strips is the tissue found on all the sides of the endodermis of the roots and prevents the entering of water to the pericycle.
10. Meristematic cells are totipotent.
a) True
b) False
View Answer
Explanation: Unlike other cells in the plant, meristematic cells are totipotent even when they are fully developed and functional at maturity. They have the ability to regenerate parts of the plant.
Sanfoundry Global Education & Learning Series – Plant Biotechnology.
To practice all areas of Plant Biotechnology, here is complete set of 1000+ Multiple Choice Questions and Answers.
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