PSS 3323 TTU Exam 1 Questions & Answers 2024/2025
Meristem - ANSWERSare the regions of plant growth and cell division and make new cells for P and S growth. (Primary growth increases the length of roots and shoots. Secondary growth increases the size/girth of woody stems and roots.)
Apical ...
Meristem - ANSWERSare the regions of plant growth and cell division and make new cells for P and S
growth. (Primary growth increases the length of roots and shoots. Secondary growth increases the
size/girth of woody stems and roots.)
Apical - ANSWERSAt the tips (apices; singular apex) of roots and stems. Often enclosed by leaves (shoot)
or protected by root cap (roots)
Axillary - ANSWERSLocated in leaf junctions, produce branches or flowers
Intercalary - ANSWERSLocated between less mature meristematic tissue and more mature M.T.
Lateral - ANSWERSForm a cylinder around stems and roots in woody plants; produce secondary growth
Ground Tissue - ANSWERSstandard plant tissue
Epidermal Tissue - ANSWERSOuter covering
Vascular Tissues - ANSWERSplumbing
Roots - ANSWERSanchor plant in soil, absorb water and nutrients, storage
Fibrous - ANSWERSMass of similarly sized roots
Taproot - ANSWERSprimary roots that grow longer and thicker than secondary roots. Some taproots are
carb storage organs
, Where are the zones of growth and water absorption for roots? - ANSWERS• Growth and Entrance of
water and minerals occurs behind the root tips (at or near root tips)
• Growth is region of elongation and region of differentiation
What type of cells are root hairs, and what role do they play? - ANSWERS- Thin walled elongated cells
•They make direct contact with the soil and are surfaces through which most of the water and mineral
elements enter the roots
Stems - ANSWERSprovide vascular connections (carbs and water) from roots to leaves and determine the
distribution of leaves.
stolons - ANSWERS-aboveground horizontal
rhizomes - ANSWERS-underground horizontal
tillers - ANSWERS-originate from axillary buds, twining shoots and tendrils
bulbs - ANSWERS-have compact unelongated stems with fleshy underground leaves,
petioles - ANSWERS-stalks that attach the stem and leaf.
What is a sessile leaf? - ANSWERS• Have no petiole.
Leaf adaptations to environment. - ANSWERS- Some plants have varying petiole lengths to maximize leaf
interception of light
• Pubescent leaves-reflect light, repel insects, decrease air movement and transpiration
• Decrease surface-volume ratio (succulents)
Which factor most affects crop development rate? - ANSWERStemperature
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