Lab Quiz 3 Flashcards
What is the objective of lab 3?
to understand the method by which plants lose water
when plants lose water it is called….
transpiring
What is the normal transpiration process for plants?
water is taken up through the soil via root hairs, It is then pulled up through the xylem to the leaves via capillary action, and finally The water then evaporates through stomatal pores in the leaves
A pore, found in the epidermis of leaves, stems and other organs which regulates gas exchange…..
stoma
Some plants have stomata on both sides of the leaf while others…
only have stomata on one side to minimize water loss
Gas exchange as well as water loss…
open stoma
Reduced gas exchange and water loss….
closed stoma
Each stoma is comprised of two guard cells which surround a central ____
pore
The opening of the stoma is due to guard cells taking in water by _____
osmosis
Plants have reduced the rates of transpiration through adaptations which ____ surface area to volume of the leaf
reduce
What are the physical adaptations of plants?
reduced the rates of transpiration, Number and distribution of stomata, Presence of a cuticle to prevent desiccation, long root system, and Leaves modified to spines to reduce water loss
a semi-solid matrix with holes which allows only small molecules to pass through it
Agar plates
What is the objective of lab 4?
To understand the processes of diffusion, osmosis and selectively permeable membranes
The tendency for the molecules of a substance to spread out, randomly, into a given space
diffusion
Movement of water from a region of low solute concentration to a region of higher solute concentration through a semi permeable membrane
osmosis
