Transport in Plants

Question 1

what are the vascular bundle?

Answer 1

the vascular bundle is the conducting vessel in a plant aiding in the transport of water and manufactured food

Question 2

what is the function of the xylem and explain how the structure is suited to its function?

Answer 2

to transport water and minerals in a plant

Question 3

what is transpiration?

Answer 3

transpiration is the loss of water from the plant

Question 4

what is the transpiration stream?

Answer 4

is the movement or flow of water from the roots to the leaves of the plant

Question 5

what are the external features affecting the rate of transpiration?

Answer 5

1.Temperature
2.Humidity
3.Light Intensity
4.Wind Speed

Question 6

what is the importance of transpiration?

Answer 6

1. It draws water up to leaves for use in photosynthesis
   2.It supplies cells with water to keep them turgid
   3.Evaporation of water from the surface of leaves cools the plant

Question 7

what are methods by which plants conserve water?

Question 8

what are the features of xylem?

Question 9

what is capillarity?

Question 10

explain the movement of water in a plant?

Answer 10

capillarity is the thinner something is, the faster and further water will travel

Question 11

what is the function of phloem and explain how the structure is suited to its function?

Question 12

what are the features of phloem?

Answer 12

phloem cells are alive
companion cells keep sieve tube cells alive
cell end walls are not completely broken down
transports food in the form of sugars

Question 12

what is translocation?

Answer 12

translocation is the movement of manufactured food such as sucrose, amino acids and other nutrients through sieve tubes from the source to the sink

Question 13

why is food storage important in organisms?

Answer 13

1. Food storage overcomes the need for autotrophs to continuously produce food and for heterotrophs to continuously take in food.
2. Provides food for periods of scarcity such as periods of drought when plants cant photosynthesize and when animals use food reserves when temperatures are too low and food is scarce eg during winter months

3.Provides food for special functions. For example, the seeds of a plant and the eggs of many animals, store the food for the embryos.

Question 14

list sites of storage in animals/ plants, products stored and examples

Answer 14

Animals:
Liver- glycogen, vitamins A, D. B12, Iron
Adipose tissue of skin- fat
Around organs- fat
Skeletal muscles- glycogen

Plants:
Roots- starch, sugars
Stems- starch. sucrose
Leaves- glucose, water
Fruits- sugars, starch, oil
Seeds- protein, oil, starch

Question 15

how does the water travel from the soil to the root in the xylem vessel?

Question 16

describe 3 ways manufactured food is used by a plant

Question 17

how does water travel up the xylem?