BOT3015 Quiz 2 Review (UCF) 2024 Exam Answers 100% Correct

BOT3015 Quiz 2 Review (UCF) 2024 Exam Answers 100% Correct What do roots do? - Answer- - Anchor plants into soil - Absorption of water and minerals - Store food or water - Other specialized functions What happens to an embryo's radicle upon germination? - Answer- Radicle grows out and develops into first root. Radicle may develop into thick taproot with thinner branch roots. OR, after radicle formation, adventitious roots may arise that develop into a fibrous root system What are adventitious roots? - Answer- Roots that develop from a stem or leaf What are fibrous roots? - Answer- Large number of fine roots of similar diameter What are the four regions of the root? - Answer- Root cap, region of cell division, region of cell elongation, region of maturation What is the root cap? - Answer- A thimble-shaped mass of parenchyma cells covering each root tip What does the root cap do? - Answer- Protects tissues from damage as root grows and secrete mucilage that acts as lubricant What is gravitropism? - Answer- A plant's response to gravity (gravity perception) What is the region of cell division composed of? - Answer- Apical meristem in the center of the root tip What are the three meristematic areas of the Region of Cell Division? - Answer- Protoderm, ground meristem, procambium What does the protoderm give rise to? - Answer- Epidermis What does the ground meristem give rise to? - Answer- Cortex and pith What does the procambium give rise to? - Answer- Primary xylem and primary phloem What occurs in the Region of Elongation? - Answer- Cells become several times their original length, vacuoles merge What occurs in the region of maturation? - Answer- Cells differentiate into various distinctive cell types, root hairs form What is the cortex? - Answer- Parenchyma cells between epidermis and vascular cylinder What does the cortex do? - Answer- Mostly stores food What is the inner boundary of the cortex? - Answer- Endodermis What does the endodermis consist of? - Answer- Single-layered cylinder of compact cells; cell walls impregnated with suberin and lignin on radial and transverse walls Where as Casparian strips found? - Answer- Endodermis