14. growth / ontogenesis

Question 1

ontogenesis

Answer 1

life cycle
life of a plant from fertil. until its death
growth/development

Question 2

growth

Answer 2

irreversible quantitative change
increasing number of cells, volume, weight, change in shape

Question 3

development

Answer 3

qualitative change
differentiation of tissues and plant organs, specialization/adaption

Question 4

internal factors of ontogenesis

Answer 4

phytohormones - growth hormones
herbicides

Question 5

ephemeral plants

Answer 5

plants living several weeks

Question 6

perennials

Answer 6

live several years

Question 7

biennials

Answer 7

2 years

Question 8

annuals

Answer 8

1 vegetative period - growing in spring, die in autumn

Question 9

etiolation

Answer 9

plants grown in partial or complete absence of light, long weak stems
smaller leaves due to longer internodes, pale yellow color (chlorosis)

Question 10

photoperiodism

Answer 10

reaction of plants towards length of day and night

Question 11

photoperiod

Answer 11

critical length of day light, different for many plants

Question 12

long day plants

Answer 12

temperate zone - potatoes, wheat, beet

Question 13

short day plants

Answer 13

equator - rice, tobacco, soya

Question 14

day neutral

Answer 14

dandelion, tomato, beans