Phytochrome Flowering in plants is controlled by the?stimulus?of night length Nights are shorter during the spring and summer and longer in the autumn and winter Some plants flower when nights are ...
The Effects of IAA Just like animals, the survival of plants is dependent on their ability to?respond to changes?in their environment; this?maximises their survival chances?e.g. Growing towards lig...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：4.1.1 Organic Compounds Representing Organic Compounds Introduction Organic Chemistry is the scientific study of the structure, properties, ...
Detection of Light The eye is a?sense organ?containing receptors sensitive to light intensity and wavelength Receptors?are specialised cells that can generate an electrical impulse in a sensory neu...
2022年AMC12A卷中國區考試于11月11日（周五）正式結束，考試結束后，很多同學反映今年的試題難度增加，有些同學則認為難度與去年持平，但由于每個人的水平不一樣，對試題難度的感知帶有自己的主觀性，不可一概而...
Synapses: Structure & Function Structures known as?synapses?are found at the?junctions between cells in the nervous system?e.g. In the sense organs there are synapses between?sensory receptor c...
Transmission of Nerve Impulses Neurones?transmit?electrical impulses?which travel along the neurone?cell surface membrane?from one end of a neurone to the other Note that an impulse is?not?an elect...
3.2.5 Practical: Effect of Catalysts on Rate of Reaction Practical: Effect of Catalysts on Rate of Reaction Aim: To investigate the effect of different solids on the catalytic decomposition ...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 復習筆記：3.2.4 Practical: Effect of Surface Area on Rate of Reaction Practical: Effect of Surface Area on Rate of Reaction Aim: To investigate the effect of...
Nervous System: Response to a Stimulus The nervous system enables the body to?detect changes in the environment?and brings about?appropriate responses?to ensure its safety Receptor cells?detect cha...
Neurones: Structure & Function Neurones?are specialised cells of the nervous system which carry?electrical impulses?around the body A bundle of neurones is known as a?nerve There are different ...
Co-ordination of Response Organisms must?respond to changes?in their?external?and?internal?environments in order to survive Organisms need to Find favourable external conditions e.g. avoiding locat...
