OCR A

What does abiotic mean? - correct answer Non-living What does biotic mean? - correct answer living What is the definition of tropism? - correct answer Growth response to a stimulus What are some examples of an abiotic stimuli? - correct answer Light, water, gravity What are some examples of biotic stimuli? - correct answer ...

What is a sole trader? - correct answer A single person who owns a business and is unincorporated (doesn't exist in its own right) What are the advantages of being a sole trader? - correct answer Few legal requirements, quick, easy, financial info can be kept private What are the disadvantages of being a sole trader? - correct answer Responsible for its debts (unlimited liability...

X-rays - correct answer Short wavelength electromagnetic waves, from 10^-8 to 10^-13m, used for medical imaging X-ray tube - correct answer a piece of equipment that produces X-ray photons by firing electrons from a heated cathode across a large p.d. in an evacuated tube - X-ray photons are produced when the electrons are decelerated by hitting the target metal of the anode. thermionic emission - correct answer ...

What is the issue of using a conical flask, water bath and bung to collect gas? How can this be modified? - correct answer 1. some gas escapes before the bung is replaced. Instead, put the solid in a specimen tube in a conical flask and mix together 2. some CO2 dissolves in the water so is not collected. A gas syringe would be better 3. bung displaces the same volume of air as itself into the cylinder How would you prepare a standard solution? What appa...

first ionisation energy - correct answer the energy required to remove one electron from each atom in a mole of gaseous atoms to form one mole of gaseous 1+ ions second ionisation energy - correct answer the energy required to remove one electron from each ion in one mole of gaseous 1+ ions to form one mole of gaseous 2+ ions factors affecting ionisation energy - correct answer at...

agonist - correct answer creates movement antagonist - correct answer opposed the agonist providing a resistance for co-ordinated movement fixator - correct answer stabilises one part of the body while another causes movement Isotonic muscular contraction - correct answer a type of muscular contraction where the muscle changes length conc...

agonist - correct answer creates movement antagonist - correct answer opposed the agonist providing a resistance for co-ordinated movement fixator - correct answer stabilises one part of the body while another causes movement Isotonic muscular contraction - correct answer a type of muscular contraction where the muscle changes length conc...

Abstraction - correct answer Representation that is arrived at by removing unnecessary details Pop - correct answer Remove and return the last item from a list/data structure Push - correct answer To add an item to the top of a stack/end of a queue/list Depth First Traversal - correct answer Each node in one branch is visited before backtrac...

- Sn = n/2 (2a + (n-1)d) - Sn = n/2 (a + l) where a is the first term and l is the last term - correct answer formula of an arithmetic series the sum of the terms of an arithmetic sequence - correct answer what is an arithmetic series - Un = a + (n-1)d - a = the first term - d = the common difference - correct answer nth term of an arithmetic sequence - Un = ar^(n-1) - a = ...

why do specimens need to be thin when observing them under a light microscope? - correct answer to allow light to pass through identify and explain the starch test - correct answer add iodine dissolved in potassium iodide solution to the sample - positive test = blue-black - negative test = orange-brown why is the structure of the plasma membrane often referred to as the fluid mosaic model? - correct answer ...