9.1 Plang Structure & Growth

Question 1

Line 3 major differences between the structures of dicotyledonous and monocotyledons

Answer 1

Arrangement of vascular bundle:
D – in a ring
M- in consecutive circles/scattered

Root:
D- fibrous
m- taproot

Leaf:
D- netlike
M-parallel

Question 2

Explain the relationship between the distribution of shoes in a leave in the function of these tissues

Answer 2

Cuticle, Lexi H2O lost, outermost layer of the top part of leaf, signed the top of the leaf the most therefore needs extra protection to retain water

Palisade Mesophyll: dance chloroplast to carry out photosynthesis, top leaf, light is most available

Veins: transfer raw materials from photosynthesis, throughout leaf and your middle, needs to access all cells

spongy mesophyll: loosely packed cells allow gas exchange [less gas exchange) under stoma, gasses come in from stoma

Stoma: allow oxygen/senior to exchange and transpiration bottom surface, less light in temperature therefore less water from transpiration lost

Question 3

Modification roots stems and leaves for different functions: bulbs, stem to burst, stored food and tendrils

Answer 3

storage roots that store cards and water. -carrot

Stems tubers store carb -Potatoes
Bulb (s) enlarged bases of leaves store food - onions

tendrils (leaf) coil around objects got support -grapes

Question 4

State that dichotomous plants half apical and lateral meristems

Answer 4

Apical grow up, lateral grow horizontally

meristem is where cell division occurs

Question 5

compare growth due to apical and lateral meristem

Answer 5

Apical is primary growth that lengthens stem, happens at the end of the stem. Lateral is secondary growth that widens stem happens at the cambium by producing new xylem and phloem of each side the vascular bundle

both form plant growth both is where subdivision is occurring,

Question 6

Explain the role of auxin in phototropismas an example of the control of plant growth

Answer 6

Phototropism:growth and movement to light
Auxin: plan hormone that causes flexibility in cells to bend towards light, pilot must have auxin receptors, found in meristems

-satellite receivers more light than other, photoreceptors release oxen oxen most of the Sunnyside the Shadyside this causes this the side that shady to elongate grow more quickly and then towards the light

Question 7

Draw and label plant diagrams to show the distribution of tissues in the stem and leaf dicotyledonous plant

Answer 7

Stem: epidermis, cortex, path, xylem and phloem and cambium – vascular bundle

Leaf: cuticle, upper epidermis, Palisade Mazeau fell, spongy mesophyll, xylem, phloem, parenchyma, lower epidermis, stoma