plants

Question 1

word eq for respiration

Answer 1

glucose + oxygen -> water + co2 + energy

Question 2

word eq for ph/s

Answer 2

water + co2 -(light energy)-> oxygen + glucose

Question 3

symbol eq for respiration

Answer 3

C6H12O6 + 6O2 -> 6H2O + 6CO2 +energy

Question 4

what’s ATP

Answer 4

Adenosine Triphosphate

Question 5

symbol eq for ph/s

Answer 5

6CO2 + 6H20 -> C6H12O6 + 6O2

Question 6

What makes starch a useful long term storage molecule?

Answer 6

it’s compact it’s insoluble
easily broken down when needed

Question 7

What are the main uses of glucose in plants?

Answer 7

1.Cellular respiration - break down the glucose to release energy
2.Make starch - which is used to store glucose for a later time
3.Make amino acids - which are used to make proteins

Question 8

how is a leaf adapted?

Answer 8

reduce water loss through waxy cuticle
stomata are open for as short amount of time possible to maximise co2 absorption but minimise water loss

Question 9

leaf

Answer 9

CO2 enters through stomata in lower epidermis
through spongey mesophyll
palisade mesophyll
upper epidermis (passes through them to pass into chloroplasts)

Question 10

how does the stomata work?

Answer 10

lots of water means guard cells are well hydrate and turgid so gap between them is larger allowing more CO2
no water guard cells lose water through osmosis and become flaccid, closing stomata

Question 11

adaptation of guard cells

Answer 11

sensitive to light so the close at nighttime when photosynthesis isn’t taking place and don’t need carbon dioxide - lower epidermis lower surface is more shaded so less water will evaporate bc it’s cooler

Question 12

Explain how auxins cause the shoot of a plant to grow towards light.

Answer 12

the auxins collect in the part of the plant away from the light and will elongate faster than the side facing the sunglight causing it to bend towards the light

Question 13

iState two variables the student will need to control in this investigation.

Answer 13

size of algal balls
same volume of solution

Question 14

Explain why the hydrogencarbonate indicator in the bottle nearest to the light source turned purple

Answer 14

bottle nearest to light had highest light intensity- absorbed more co2 from the solution - solution less acidic to turned from red to purple

Question 15

marram grass is adapted to survive in the hot, windy and dry conditions of a sand dune.

Answer 15

1.rolled to trap air
2.thin to withstand wind damage
3.hairs minimise air flow that can carry water away
4.long and flexible so doesn’t snap in wind
5.stomata in the pits to minimise water loss
6.waxy cuticle to stop water evaporation

Question 16

two commercial uses of gibberellins not including their role in germination.

Answer 16

flowering quicker
fruit grow quicker

Question 17

xylem

Answer 17

dead cells
flows one way
carries water through transpiration
lines with lignin to stop water loss by osmosis

Question 18

phloem

Answer 18

live cells
flows 2 ways
transports sucrose by translocation

Question 19

root adaptations

Answer 19

The root hairs, enlarge the surface area of the root meaning that more water can be absorbed into the plant.

Question 20

aquino in the root

Answer 20

auxins collect on the lower part of the root where gravity pulls them down
root will elongate slower so the top part could grow quicker