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 复习笔记：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卷中国区考试于11月11日（周五）正式结束，考试结束后，很多同学反映今年的试题难度增加，有些同学则认为难度与去年持平，但由于每个人的水平不一样，对试题难度的感知带有自己的主观性，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 复习笔记：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...
