Unit 1: AOS 2, DP 1

Question 1

Shoot system

Answer 1

above-ground system of plants, site of photosynthesis, transport of sugars and site of reproductive organs

Question 2

Root system

Answer 2

below-ground system of plants, anchors plant in the soil, responsible for absorption and conduction of water and minerals, and storage of excess sugars (starch)

Question 3

Meristematic tissues

Answer 3

plant tissue found in tips of roots and shoots that is made of unspecialized cells that reproduce by mitosis

Question 4

Permanent tissues

Answer 4

plant cells that can no longer divide

Question 5

Dermal tissue

Answer 5

tissue that protects soft tissues of plants and controls water balance

Question 6

Ground tissue

Answer 6

all plant tissues that are not dermal or vascular

Question 7

Parenchyma

Answer 7

in leaves the site of photosynthesis and in roots, tubers and seeds the site of stored starch and oils

Question 8

Collenchyma

Answer 8

main supporting tissue of stems

Question 9

Sclerenchyma

Answer 9

dead cells with thickened walls for strength and rigidity

Question 10

Vascular tissue

Answer 10

plant tissue composed of xylem and phloem

Question 11

Xylem

Answer 11

transports water & minerals, provides plant with support

Question 12

Phloem

Answer 12

transports sugars & other organic compounds

Question 13

Root hairs

Answer 13

are thin extensions of epidermal cells that form outer covering of the root

Question 14

Water loss occurs via

Answer 14

transpiration of water vapour through the open stomata of leaves

Question 15

Water loss occurs when the

Answer 15

concentration of water vapour within the leaf spaces is higher than that in the air outside the leaves

Question 16

Opening & closing of stomata is controlled by

Answer 16

guard cells, enclose the stomatal pores