CIE IGCSE Biology: 復(fù)習(xí)筆記：16.1.3 Sexual Reproduction in Plants Insect-Pollinated Flowers Flowers are the?reproductive organ?of the plant They usually contain both male and female reproductive pa...
CIE IGCSE Biology: 復(fù)習(xí)筆記：16.1.2 Sexual Reproduction Gametes & Zygotes Sexual Reproduction Sexual reproduction is?a process involving the fusion of the nuclei of two gametes (sex cell...
CIE IGCSE Biology: 復(fù)習(xí)筆記：16.1.1 Asexual Reproduction Asexual Reproduction Asexual reproduction does not involve sex cells or fertilisation Only one parent is required?so there is ...
CIE IGCSE Biology: 復(fù)習(xí)筆記：15.1.1 Drugs for Medicine What is a Drug? A drug is?any substance taken into the body that modifies or affects chemical reactions in the body Some drugs are medicinal d...
CIE IGCSE Biology: 復(fù)習(xí)筆記：14.1.11 Tropisms Gravitropism & Phototropism Tropisms Plants can respond to changes in environment (stimuli) for survival, e.g.?light, water, gravity Their response...
CIE IGCSE Biology: 復(fù)習(xí)筆記：14.1.10 Homeostasis: Temperature Control The Skin & Homeostasis: Extended Control of body temperature is a?homeostatic?mechanism Homeostasis is?the maintenance of a...
CIE IGCSE Biology: 復(fù)習(xí)筆記：14.1.9 Homeostasis The Concept of Negative Feedback: Extended Negative feedback occurs when conditions change from the ideal or?set point?and returns cond...
CIE IGCSE Biology: 復(fù)習(xí)筆記：14.1.8 Homeostasis: Definition Homeostasis: Definition Homeostasis is defined as?the maintenance of a constant internal environment Role of Insulin...
CIE IGCSE Biology: 復(fù)習(xí)筆記：14.1.7 Hormones in Humans Hormones & Their Associated Glands What is a Hormone? A?hormone?is a chemical substance produced by a?gland?and carried by the?bloo...
CIE IGCSE Biology: 復(fù)習(xí)筆記：14.1.6 The Eye Structure & Function of the Eye The eye is a?sense organ?containing receptor cells that are sensitive to?light?(rod cells) and?colour?(...
CIE IGCSE Biology: 復(fù)習(xí)筆記：14.1.4 The Synapse Structure of a Synapse: Extended The junction between two neurones is known as a?synapse A synapse Synapses & Neurotr...
CIE IGCSE Biology: 復(fù)習(xí)筆記：14.1.3 The Reflex Arc The Reflex Arc Voluntary Responses A voluntary response is one where you make a?conscious decision?to carry out a particular action therefo...
