What are the Three different sciences that Student study at GCSE level

Which of the following is true of natural population a.) populations are all the individuals of a species living in a defined area b.) populations are all uniform in size c.) viable populations exhibit little, if any, genetic variation

Which statement names a physical property of wood? wood does not rustwood can burnwood can rotwood is softer than coal

Which enzyme is responsible for “unzipping" the dna by breaking the hydrogen bonds between the nucleotides?