Biology Experiments.Educational experimental work to download by D G Mackean.An amylase m l e s is an enzyme that catalyses the hydrolysis of starch into sugars.Amylase is present in the saliva of humans and some other.Effect Of Amylase Concentration On Enzyme Activity And Temperature' title='Effect Of Amylase Concentration On Enzyme Activity And Temperature' />Human senses 1 Reaction time.The distance a vertical ruler falls before being gripped is converted to a time interval.Reaction time. 1.Discussion. 1. 0.Discussion answers.Reaction time preparation.All zipped. 2a The blind spot 1A dot seems to disappear when its image falls on the blind spot.The blind spot 2A gap in a line is filled in when its image falls on the blind spot.The blind spot a b2.Discussion answers.All zipped. 3 Inversion of the image.When a pin is viewed via a pinhole in front of the pin, its image appears to be inverted.Inversion of the image.Discussion preparation.All zipped. 4a The iris diaphragm 1The iris is observed to reduce the size of the pupil when the eye is exposed to light.The iris diaphragm 2Brocas pupillometer A pattern of pinholes appears to change when one eye is exposed to light.Iris diaphragm 1 24.Discussion answers preparation.Ray diagram for pupillometer.All zipped. 5 Retinal capillaries.By moving a pinhole about in front of the eye, an image of retinal capillaries appears.Retinal capillaries.Discussion answers preparation.All zipped. 6a Binocular vision eye dominance.A pencil lined up with a window frame appears to jump when the dominant eye is closed.Binocular vision double vision.Slight pressure on one eyeball causes a single object to appear as a double image 6.Binocular vision a and b6.Discussion answers.All zipped. 7 Judgement of distance.The space sequence of coloured pinheads is judged using either one or both eyes.Judgement of distance.Discussion preparation.All zipped. 8 Eye and hand co ordination.A star pattern is traced while looking in a mirror.Eye and hand co ordination.Discussion. 8. 0.Discussion answers.Eye and hand co ordination preparation.All zipped. 9 Perception.Two shapes are observed, and demonstrate that the brain makes an interpretation of.Perception. 10 Sensitivity of the skin to touch.Different areas of skin are tested with light touch to see if there are differences in reponse.Sensitivity of the skin to touch.Discussion. 10. 0.Discussion answers.Sensitivity to touch preparation.All zipped. 11 Recognition of separate stimuliSpatial discrimination Different areas of skin are tested with a hairpin to see if they can discriminate a double touch from a single touch.Recognition of separate stimuli.Discussion. 11. 0.Discussion answers.Recognition of stimuli preparation.All zipped. 12 Sensitivity to temperature.One finger is placed in hot water and another in cold water.Both are then placed in warm water and the sensations compared. Usb Game Controller Drivers Download more. Sensitivity to temperature.Discussion and preparation.All zipped. 13 Location of stimuli.A marble is rolled between crossed fingers to give the sensation of two marbles.Location of stimuli.Discussion answers preparation.All zipped. Back to top.Transport in plants.Uptake and evaporation in leaves.The uptake of water by single leaves is measured after coating either, neither or both surfaces with Vaseline.Uptake and evaporation in leaves.Discussion. 1. 0.Discussion answers.Uptake and evaporation in leaves preparation.All zipped. 2 Uptake of water by shoots.The uptake of water by a shoot is measured, using a potometer.Uptake of water by shoots.Discussion. 2. 0.Discussion answers.Uptake of water by shoots preparation.All zipped. 3 Rates of transpiration.The potometer is used in different conditions to compare rates of uptake by the shoot.Rates of transpiration.Discussion. 3. 0.Discussion answers.Rates of transpiration preparation.All zipped. 4 Rate of transpiration and water uptake.By weighing the shoot and potometer, the uptake and loss of water are compared.Rate of transpiration and water uptake.Discussion. 4. 0.Discussion answers.Rate of transpiration and water uptake preparation.All zipped. 5 Uptake of water by an uprooted plant.The potometer is modified to accept a whole plant rather than a cut shoot.Uptake of water by an uprooted plant.Discussion. 5. 0.Discussion answers.Uptake of water by an uprooted plant preparation.All zipped. 6 Conditions affecting evaporation.A simple atmometer is used to investigate the effects of different atmospheric conditions on the rate of evaporation.Conditions affecting evaporation.Discussion. 6. 0.Discussion answers.Conditions affecting evaporation preparation.All zipped. 7 Water tension in the stem.The lower end of the potometer is placed in mercury, which is pulled up the capillary by the transpiration force.Water tension in the stem.Water tension in the stem preparation.All zipped. 8 Pathways for gases in a leaf.A leaf is immersed in hot water to expand and force out any air inside it.Pathways for gases in a leaf.Pathways for gases in a leaf preparation.All zipped. 9 Evaporation from the leaf surface.Evaporation from the upper and lower leaf surface is compared and correlated with the distribution of stomata.Evaporation from the leaf surface.Discussion. 9. 0.Discussion answers.Evaporation from the leaf surface preparation.All zipped. 10 To collect and identify the product of transpiration.The shoot of a plant is enclosed in a plastic bag.The liquid which condenses is identified.To collect and identify the product of transpiration.To collect and identify the product of transpiration preparation.All zipped. 11 To trace the path of water through a shoot.Shoots are placed in a dye in order to investigate the route it takes through the stem and leaves.To trace the pathway of water through a shoot.To trace the pathway of water through a shoot preparation.All zipped. 12 Conducting pathways through the shoot.A syringe is used to force air through a shoot held under water, Air bubbles show the continuity of the vessels.Conducting pathways in the shoot.Discussion. 12. 0.Discussion answers.Conducting pathways in the shoot preparation.All zipped. 13 Measuring the transpiration rate of a potted plant.Two potted plants, one in sunlight and one in shadow are weighed at intervals.Measuring the transpiration rate of a potted plant.Measuring the transpiration rate of a potted plant preparation.All zipped. 14 Measuring the transpiration rate of an uprooted plant.Two flasks of water are weighed at intervals.One of them contains a plant.Measuring the transpiration rate of an uprooted plant.Measuring the transpiration rate of an uprooted plant preparation.All zipped. Back to top.Germination and tropisms.Introduction. Introduction.Resources list. Germination times peas and wheat.Germination times sunflower and maize.Germination times French bean.All zipped. 1 The need for oxygen.Cress seeds are sown on moist cotton wool in 2 flasks one of which contains pyrogallic acid and sodium hydroxide.Need for oxygen. 1.Discussion. 1. 0.Discussion answers.Need for oxygen preparation.All zipped. 2 Effect of temperature.Maize fruits are germinated in moist blotting paper at different temperatures.Effect of temperature.Discussion. 2. 0.Discussion answers.Effect of temperature preparation.All zipped. 3 The need for water.Seeds are left in moist, dry and waterlogged conditions for a week.Need for water. 3.Discussion answers and preparation.All zipped. 4 The role of cotyledons.Runner bean embryos attached to varying amounts of cotyledon are germinated on moist blotting paper in jars.Role of cotyledons.Discussion. 4. 0.Discussion answers.Role of cotyledons preparation.All zipped. 5 Use of food reserves in germination.Coleoptiles and endosperm of cereal seedlings and grains are tested for starch and sugar.Use of food reserves.Discussion. 5. 0.Discussion answers.Use of food reserves preparation.All zipped. 6 Geotropism in radicles.Pea seedlings are pinned to a clinostat, or a stationary base, with their radicles horizontal.Geotropism in radicles.Discussion. 6. 0.Discussion answers.Geotropism in radicles preparation.All zipped. 7 The region of growth and response in radicles.Radicles are marked with equidistant lines and left horizontally or vertically for two days.Region of growth and response in radicles.Discussion. 7. 0.Discussion answers.Region of growth and response in radicles preparation.All zipped. 8 Region of detection and response to one sided gravity in radicles.Different lengths of root tip are excised to see if the radicles still grow and respond to gravity.Detection of unilateral gravity.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
November 2017
Categories |