AQA A Level Biology复习笔记8.1.1 Genetic Mutations
Gene Mutations A gene mutation is a change in the sequence of base pairs in a DNA molecule that may result in an altered polypeptide Mutations occur continuously and spontaneously Errors in the DNA...
Gene Mutations A gene mutation is a change in the sequence of base pairs in a DNA molecule that may result in an altered polypeptide Mutations occur continuously and spontaneously Errors in the DNA...
The Definition of a Community Species do not exist by themselves in their own isolated environment, they interact with other species forming communities A community can be defined as: Multiple popu...
Genetic Variation Phenotype variation The observable characteristics of an organism are its phenotype Phenotypic variation is the difference in phenotypes between organisms of the same speci...
Species Exist in Populations A species can be defined as a group of similar organisms that can reproduce to give fertile offspring Organisms of the same species have the same number of chromosomes ...
Key Terms in Genetics Genes & alleles The DNA contained within chromosomes is essential for cell survival Every chromosome consists of a long DNA molecule which codes for several differe...
Homeostasis In order to function properly and efficiently, organisms have different control systems that ensure their internal conditions are kept relatively constant Physiological control systems ...
Muscle Pairs The effective movement of the human body requires both muscle and an incompressible skeleton This is because muscles will only produce effective movement if they pull on a structure th...
Myelinated Motor Neurones Information is sent through the nervous system as nerve impulses – electrical signals that pass along nerve cells known as neurones A bundle of neurones is known as a nerv...
Responding to Change Aids Survival Organisms must respond to changes in their environment in order to survive They can only survive if they are successful at: Finding favourable conditions for livi...
© 2025. All Rights Reserved. 沪ICP备2023009024号-1