Plant Science. In this unit you will learn about: Plant and animal cells Structure of a plant...
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Transcript of Plant Science. In this unit you will learn about: Plant and animal cells Structure of a plant...
![Page 1: Plant Science. In this unit you will learn about: Plant and animal cells Structure of a plant (leaf, stem, root, etc) Photosynthesis, Respiration, Osmosis,](https://reader035.fdocuments.us/reader035/viewer/2022070411/56649cc15503460f9498908e/html5/thumbnails/1.jpg)
Plant Science
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In this unit you will learn about:• Plant and animal cells• Structure of a plant (leaf, stem , root, etc)• Photosynthesis, Respiration, Osmosis,
Translocation, Active Transport, etc.• Sexual Reproduction in a flowering plant.• Plant hormones• Food Biomolecules and their tests.
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Plant Cells Has a cell Wall Has a large
Vacuole Has Chloroplasts
Animal Cells Has no cell
wall Has small
vacuoles Has no
Chloroplast
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Photosynthesis Transpiration Gaseous Exchange Food Storage
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Stomata- Gaseous Exchange
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Lenticels-Gaseous Exchange in Stems
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State 3 differences between plant and animal cells.
Give 4 functions of a leaf. Where does gaseous exchange take place
in the leaf?. Where does gaseous exchange take place
in the stem?.
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Is the loss of water vapour from the surface of the leaf of the plant
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The movement of food around the plant. Phloem tissue In both directions Sugar is transported from the leaf to the
root. Beet root.
Vascular Tissue Xylem- transports water and minerals. Phloem- transports food.
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Parenchyma Cells-Photosynthetic Cells Schlerenchyma Cells- Strengthening Cells Collenchyma Cells- Strengthening Cells Meristematic Tissue- cell Division Ground Tissue- bulk of cell.
Photosynthesis takes place here. Vascular Tissue- Transport tissue Xylem- Transports Water and Minerals Phloem- transports food
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State the balanced chemical equation for photosynthesis.
Define the term Transpiration. Define the term Translocation. Name 2 types of vascular tissue and give
their functions. Name the cells responsible for
strengthening? Name the cells where photosynthesis
takes place? Name the cells responsible for cell
division
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1. Transports water, minerals from the
roots.
2. Transports food from the leaf
3. Supports the aerial part of the plant
4. Stores food e.g. potatoes
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T.S. Monocot T.S. Dicot
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Functions Food Store Anchorage
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Is the movement of water from an area of high concentration of water to an area of low concentration of water across a semi permeable barrier
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Is the movement of gases from an area of high concentration to an area of low concentration.
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Is the movement of substances from an area of low concentration to an area of high concentration. It requires energy.
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Give functions of the root Give functions of the stem Define osmosis, active transport and
diffusion. Compare Monocots to Dicots.
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Is the transfer of pollen from the anther of one plant to the stigma of another plant
Self Pollination – when pollination occurs between flowers on the same plant.
Cross Pollination- when pollination occurs between flowers of the same species but on different plant.
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Insect Pollinated Lily Large Flowers Scented Brightly coloured Male and female parts inside flower Sticky pollen grains Small pollen grains
Wind pollinated Grass Smaller flowers Not scented Not brightly
coloured Male and female
parts outside the petals
Smooth Pollen grains
Large amount of pollen
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Is the fusion of the male
gamete with the female gamete.
It forms a Zygote
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The zygote divides repeatedly until it forms the embryo that will contain:
1 or 2 cotyledons with a food storePlumuleRadicleThe ovary becomes the fruit
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Is the transfer of the seeds/fruit away from the parent plant
Wind Water Animal Self
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Where a plant suspends all growth and metabolism
Shortage of hormones Low temperature Growth inhibitors
Maximises growth of the plant. Allows for seed dispersal Ensures survival
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Is the regrowth of a plant after a period of dormancy
Conditions necessary Water Oxygen Warmth
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Name the male and female parts of the flower. What is a calyx and a corolla. Define pollination, fertilisation, dormancy and
germination. Differentiate between self and cross
pollination. Compare wind pollinated flowers to insect
pollinated flowers. What does a plumule and a radicle develop
into? Define Dormancy List the conditions necessary for germination. Describe Epigeal and Hypogeal germination
using examples.
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If the cotyledons absorb the endosperm the seed is NON-ENDOSPERMIC= Broad Bean
If the cotyledons absorb only some of the endosperm the seed is ENDOSPERMIC = Maize.
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Annuals/perennial- Complete their lifecycle in one year
Biennials- it takes 2 years to complete their lifecycle. In the first year the plant grows leaves, stems, and roots (vegetative structures), then it enters a period of dormancy over the colder months. During the next spring or summer, the stem of the biennial plant elongates greatly, The plant then flowers, producing fruits and seeds before it finally dies.
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Naturally produced in the root and shoot tip.
It promotes cell elongation Stimulates fruit development. Promotes root development.(rooting
agent) Control apical dominance Its used in seedless fruits: Parthenocarpic
fruit IAA
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Encourages cell elongation Promotes seed germination
Cytokinin. Used as a herbicide by massively increasing rate of growth and the plant cannot produce enough food and it dies!
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A growth response to a stimulus. Phototropism- A growth response to light Geotropism- a growth response to gravity Thigmotropism- a growth response to
touch Chemotropism- A growth response to
chemicals Hydrotropism- A growth response to water Thermotropism- A growth response to
temperature.
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Clinostat.
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What is a tropism. What is phototropism and geotropism? What piece of apparatus is used to show
geotropism? Define Aerobic respiration Give a balanced chemical equation for
aerobic respiration.
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An indicator species is a species that shows the conditions in habitat.
Examples• Wet: rushes, moss, buttercup.• Dry/Sandy: Thistle.• Low in lime (acidic): Plaintain/rhododendron• Rich in Lime (alkaline) : Clovers, Chickweed.
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Starch Protein Reducing Sugar
Vitamin C
% Sugar
Reagent Iodine Biurets Benedicts Reagent
DCPIP Refractometer
Source Potato, Starch solution
Peas, Milk
Glucose Solution
Orange Grass, beet, etc.
Initial Colour
Golden Brown
Blue Blue Blue
Positive Colour
Blue Black
Purple Brick Red Yellow