Paper 1 Flashcards
What is the function of the nucleus?
Controls the activity of the cells and encloses genetic info
What are the advantages of an electron microscope?
Greater magnification
Higher resolution
What is the equation for magnification?
Magnification= size of image÷ real size of object
What type of pathogen causes malaria
Protist
Suggest reasons for a reduced number of deaths from malaria
Better healcare
Vaccine
Stopped mosquitos from breeding
What things defend the body from pathogens?
Skin Stomach Mucus Eyes Immune system, white blood cells(engulfs) Antibodies Antitoxins
Whats the word equation for photosynthesis
Carbon dioxide +water ——–> glucose+ oxygen
Whats one way an experiment can be improved
Repeating experiment and finding the mean
How is the volume of water lost from the leaves controlled?
Gaurd cells opening and closing the stomata
Describe the transport of water through a plant from the roots to the atmosphere
Water is transported in xyelm
Water evaporates from leaves through the stomata
Name one component of blood that starts the process of blood clotting
Platelets
Which part of the blood transports glucose?
Plasma
Define the term double circulatory system
Right side of the heart pumps blood to the lungs
Left side of the heart pumps blood around the body
Why is having one ventricle less efficient than having two
Oxygenated and deoxygenated blood mixes so less oxyegn reaches the body
What type of cell divides when new gill of a fish grows
Stem cells
