Last minute things\

Question 1

gravatropism

Answer 1

Sucrose accumulates in phloem which draws water into companion cell, causing build up of pressure in phloem. When sucrose leaves at sink end the loss of sucrose causes a reduction in osmotic pressure and water moves to xylem

Question 2

gravatropism

Answer 2

when a root is placed on its side, gravity causes statolithy to accumulate on lower side of root, PIN3 directs auxins to bottom of root as well, high concentrations of auxins inhibit root growth at bottom so the top cells elongate at higher rate, causing root to curve downwards

Question 3

Germination steps

Answer 3

1) Water is first absorbed and activates cell metabolically
2)Gibberellin, a hormone is produced in the cotyledon
3)Gibberellin stimulates amylase, the enzyme that turns starch into maltose
4) maltose is moved from food stores into growth regions, which are the embryo shoot and root.
5)maltose is converted to glucose, and then used in aerobic respiration to make cellulose

Question 4

what is cotyledon

Answer 4

cotyledon, seed leaf within the embryo of a seed. Cotyledons help supply the nutrition a plant embryo needs to germinate and become established as a photosynthetic organism