exam bio few stuffs

Question 1

what does the epidermis do?

Answer 1

waxy outerlayer for water loss

thin layer of cells, keeping outside out and inside in

Question 2

what is a cuticle

Answer 2

waxy outerlayer,prevents water loss.

Question 3

parenchyma

Answer 3

most abundant, thin and flexible.

Question 4

parenchyma

Answer 4

most abundant, thin and flexible. photosynthesis storage and space filling

Question 5

how does water get from roots to leaves

Answer 5

as water evaporates in the leaves it draws water upwards

Question 6

collenchyma

Answer 6

help hold up the plant (celery)

Question 7

collenchyma

Answer 7

help hold up the plant (celery)

no lognin just cellulose

provide support for yong growing and non woody tissues

gives strength but allows growth

Question 8

sclerenchyma

Answer 8

have lignin, secondary thicker cell walls, they die and leave behind wood

lignin cannot be reabsorbed

Question 9

Phloem

Answer 9

transport of sugars from source (photosynthetic leaves) to sink(developoing tiessues etc.)