The structure of the C4 leaf shows how mesophyll cells hug the epidermis of the leaf. hug the bundle sheath cells. b. they are spikey. how there are stomata on the underside of the leaf. they store water. e. AJ b C e d
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- Guard cellsa. are found primarily on the upper surface of leaves.b. open their stomata by shrinking.c. lack chloropolasts.d. close in response to abscisic acid.What structural features of guard cells foster their ability to form anopen pore in plant epidermal surfaces?a. thickened inner cell walls and radially oriented microfibrilsb. thickened outer cell walls and radially oriented microfibrilsc. thickened inner cell walls and longitudinal microfibrilsd. thickened outer cell walls and longitudinal microfibrilse. uniform thickness of cell walls and randomly arrangedmicrofibrilsMinerals dissolved in watera. enter root epidermal cells by active transport.b. take an extracellular pathway through roots to thevascular cylinders.c. are transported up through phloem to the leaves.d. enter root cortex cells by diffusion.
- Why do you think the upper cuticle of the leaf is thicker than the lower cuticle? B. Look at a will only see a šmall portion of a vascular bundle (ievein) since ift will be in cros5-section. The stometa are justempty spaces on the lower epidermis). H. Examine radish seedlings. Use forceps to put a radish seedling on a slide without water or coverslip. Examine it with a stereomicroscope. Note the "bottle brush" appearance of the root hairs. (DEMO, SCope- follow the directions so the root hairs don't dessicate i.e, dry out) syringa leaf C.S, and find the same parts(though youGuard cells in plant leaves protect the cork cambium.a. Trueb. FalseIn roots, growth of lateral branches beginsa. on the root epidermis.b. on the root hairs.c. at the ground meristem.d. at the pericycle.
- The stomata opening is due to guard cells changing their shape, which is restricted by a. They have spiral bands of cellulose within the cell. Ob. Their cell wall is elastic and can expand and contract. Their cell wall has a zig-zag concertina, which folds and unfolds. Their cell wall is much thicker on the stomata side of the celL e. They have internal elastic contractile fibres that keep the cell under tension.A. Plant Transportation1. Transport of Substances from the epidermis towards the vascular tissuesFill-in the blanks with the following choices: casperian strip, symplast pathway, xylem, plasmodesmata, apoplast pathway Water and solutes either in solution or suspension move through cells through the apoplast and symplast pathway. __________ involves movement of substances through the intercellular spaces (matrix) between cells. __________on the other hand, allows movement of substances by passing through the cell membrane entering the cytosol and transfers to another cell through the opening in the cell walls called __________. However, the presence of the __________in the endodermis before the stele where vascular tissues are found, impedes the apoplastic route, thus substances move via the symplastic route to the__________. 2. Transport of substances through the XylemArrange in sequence the statements. Use 1-5.______ Absorption of water takes place due to capillary action to…Compare collenchyma tissue to sclerenchyma tissue with regard to:a. the structure and composition of the cell wallb. functionsc. position in plants
- Vertical elongated cells of the xylem (such as tracheids or vessels) are developed from a. cortex O b. C. ray initials fusiform initialsO b. Green plants do not have asex oduction. Green plants differ from the algal Charophycea in: Green plants do not have growth throughout the whole length of the stem. a. O c. Green plants have seeds. d. Green plants have vascular tissue. O e. Green plants use phragmoplasts.Woody trunk of living trees was said to shrink and expand at different times of the day. Explain this phenomenon in relation to cohesion tension theory and discuss how would plant overcome embolism due to this theory.