The graph shows the effects of changing the temperature, light intensity and carbon dioxide concentration on the growth of lettuce plants.
400
4% CO,. 25°C
300
4% CO., 15°C
Mean mass
of lettuce
plants after
21 days
200
in grams
100
0.03% CO., 25°C
0.03% CO 15°C
0
2
8
10
4
6
Light intensity in arbitrary units
(a)
Describe and explain the effect of increasing light intensity on the mean mass of
lettuce plants at 4% carbon dioxide and 15°C

an adaptation is a change or process by which an organism takes to be better suited for its environment. for example; migration is a behavioral adaptation, this is needed because birds are not built to last extremely cold climates. there are different adaptations because there are different species needing to adjust to different things, bears don't migrate; they hibernate.

one centimetre is equal to 0.01 metres

ucd e e. rr. t t t t t t. to

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;