Biology Flashcards
How do you calculate total magnification
Eyepiece lens x Objective lens
What does resolution mean
Resolution is the ability to distinguish between two separate points in an image
What is the role of the nucleus
Contains DNA in the form of chromosomes. Contains the genetic code.
What is the role cytoplasm in a cell
This is where chemcial reactions take place
What is the function of the cell membrane
Controls what enters and leaves the cells.
What is function of the mitochondria is cells
This is the site of respiration.
Glucose + Oxyen –> Carbon dioxide + water vapour + ATP energy
Define the word ‘magnification’
Magnification is how much bigger an image is compared to it’s actual size.
Can be calculated by using the IAM triange.
Function of the cellulose cell wall
This is outer layer of plant cells. It is made of cellulose. It gives the plant strength and support.
Why are ribosomes needed in a cell?
Ribosomes are the site (location) where proteins are made.
What is the function of chloroplasts in plant cells?
Chloroplasts contain a green chemcial called chlorophyll. It traps sunlight energy which is needed for photosynthesis.
What is a Cell
The basic building block of life e.g. muscle cell
What is a Tissue
Formed by lots of similar CELLS working together to perform the same same function e.g. muscle tissue
What is an Organ
Formed by lots of TISSUES working together to form e.g. heart, brain, lungs
What is an Organ System
Lots of ORGANS working together in a SYSTEM e.g. digestive system, nervous system
What is an Organisms
Is all of the body’s SYSTEMS working together to form a living thing e.g. human, animal, tree
Stem cells
Before a cell has differentiated, or specialised it is called a stem cell.
A cell that has not yet become specialised.(undifferentiated)
Can replicate many times, and has the potential to become specialised (e.g. different type of cellj
What is a Pathogen
a bacterium, virus, or other microorganism that can cause disease.
What is HIV
human immunodeficiency virus, a retrovirus which causes AIDS.
What is rose black spot
a fungal or bacterial disease of plants, especially roses, producing black blotches on the leaves.
What is a vector
an organism, typically a biting insect or tick, that transmits a disease or parasite from one animal or plant to another.
What is a communicable disease
an infectious disease transmissible from person to person by direct contact with an affected individual or the individual’s discharges or by indirect means by a vector CONTAGIOUS DESEASE
What is a non communicable desease
A non-communicable disease is a medical condition or disease that is not caused by infectious agents non-infectious or non-transmissible can refer to chronic diseases which last for long periods of time and progress slowly. They are the leading cause of death globally.
What is “LORD”
L = left pumps O = oxygenated R = right pumps D = de-oxygenated
What is a carbohydrates
foods and living tissues and including sugars, starch, and cellulose.
