Introduction:
The development of an embryonic plant in the form of the seedling is called as the germination of a seed. During germination, root grows first and provides water and mineral from the soil to the developing shoots.
Answer to Problem 1MC
Correct answer:
When a
Option (d) is given as “a root cap protects the emerging root”.
Explanation of Solution
Justify reason for the correct statement:
Seeds germinate below the soil, so the delicate part of the embryo that is apical meristem part of an embryo is needed to be protected from the sharp particles of soil during the time of seed germination. Thus, the apical meristem part of the root is protected by the outer covering of root cap.
Hence, option (d) is correct.
Justify reasons for the incorrect statements:
Option (a) is given as “a coleoptile protects the emerging shoot”.
Coleoptile layer is only present in
Option (b) is given as “the shoot develops more rapidly than the root”.
During germination, root develops more rapidly as it provides water and mineral from the soil to the shoot. Hence, it is a wrong answer.
Option (c) is given as “the shoot absorbs nutrients directly from the endosperm”.
The cotyledon part of seed absorbs nutrient from the endosperm. Hence, it is a wrong answer.
Hence, options (a), (b), and (c) are incorrect.
The emerging tip of the root in dicot seed is protected by the root cap.
Want to see more full solutions like this?
Chapter 45 Solutions
Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
- A monocot stem differs from a eudicot stem in that, in the monocot stem,a. xylem and phloem are in a ring surrounding the pith.b. xylem and phloem are in bundles scattered throughout the stem.c. there is an organized cortex and pith.d. xylem forms a star in the center, with phloem between the points of the star.e. the epidermis does not have a waxy cuticle covering it.arrow_forwardWhich of the following statements is false?a. Auxin and gibberellin promote stem elongation.b. Cytokinin triggers growth of lateral buds.c. Abscisic acid promotes water loss and dormancy.d. Ethylene promotes fruit ripening and abscissionarrow_forwardChoose the incorrect statement: a. Fusiform and ray initials are formed by the vascular cambium. b. The cork cambium produces the periderm layer, a thicker tougher outer layer that replaces the epidermis. c. Wood is composed of secondary xylem. d. The vascular cambium separates the xylem on the outside of the stem and the phloem on the inside.arrow_forward
- Which of the following is True?a. Ethylene stimulates abscission layers to form.b. Abscisic acid causes abscission layers to form.c. Ethylene is sometimes sprayed on flowers to keep them fresh.d. Abscisic acid stimulates seed germination.arrow_forwardThe reiterative unit of the vegetative shoot consists of: A. Node, leaf and lateral root B. Internode, node, leaf and axillary buds C. Terminal bud, axillary bud, leaf and internode D. Node, leaf, axillary bud, leaf scar E. Internode, leaves, node, lateral rootarrow_forwardExamine different parts of a shoot,draw labelled diagrams (only one diagram indicating all parts)and provide important features. a. Terminal bud b. Axillary bud c. Branches d. Node e. Internodearrow_forward
- The intercalary meristems help in increasing the length of the internode of monocots.a. Trueb. Falsearrow_forwardChoose the incorrect statement: a. Bundle sheath cells surround the vascular bundles in both eudicots and monocots. b. Phloem sieve elements contain a higher concentration of amino acids than xylem vessels. c. Phloem sieve elements and xylem tracheary elements are similar at maturity because they are both dead. d. Root hairs are the primary cell type that absorbs water in roots.arrow_forwardThe shoot tip of an emerging maize seedling is protected by a. hypocotyl. b. epicotyl. c. coleoptile. d. plumule.arrow_forward
- Which of the following is true regarding germination? a. Imbibition of water is the first step of germination b. All are true regarding germination c. Shoots emerge first, then roots d. The seed coat stays intact during germination e. Freezing and thawing can help start germinationarrow_forwardWhich of the following is false? a. Stems have vascular bundles, and roots have vascular cylinders. b. Lateral roots can arise from nodes on a root. c. Primary growth (lengthening) can occur at an axillary bud. d. Apical meristem gives rise to epidermal tissue, ground tissue, and vascular tissue. e. Wood is xylem that forms during secondary growtharrow_forwardWhich of the following statements about primary growth and secondary growth is/are true? A. Primary growth originates at the root apical meristem and shoot apical meristem. B. Secondary growth originates at the cork cambium and vascular cambium. C. Primary growth adds to the length of the plant. D. Secondary growth adds to the width of the plant. E. All of the above F. C and Darrow_forward