What is a virus?
a tiny, non living particle
What do viruses do?
enters cells, takes over and reproduces inside of them
Are viruses cells?
Viruses do not use their own.........to grow or respond to their surroundings.
Viruses cannot make......or..........
Can viruses multiply?
Viruses can only multiply when they are inside a living...............
What is a host?
an organism that provides a source of energy for a virus or another organism
What is a parasite?
an organism thatlives on or in a host
Are viruses small or big? And how can you observe them
they are very small and cannot be seen without a very powerful microscope
How do viruses spread?
All the toxins are released when the cells burst
How do viruses take over the cell?
they connect to the cell so it can injct it with genetic material
Viruses only infect the...........they are intended for.
What is the difference between an active and hidden virus?
an active can be attacked, a hidden is undetected and can not be attacked
Can you get rid of a hidden virus?
Are bacteria prokaryotes?..."pro have no(nucleus)"
Are bacteria cells complicated or simple? Why?
simple because they have no nucleus so it makes the process faster and simpler
What are the parts of a bacteria cell?
Cell wall, cytoplasm, ribosomes, flagellum
What does the cell wall do?
What is cytoplasm?
gel like liquid
What do ribosomes do?
make proteins for the cell
What is flagellum?
a whip-like tail that moves the bacteria
What are the 3 main shapes of bacteria?
spherical, rod-like, spiral shaped
How do bacteria autotrophs obtain food?
Sun's energy, or chemicals
How do bacteria heterotrophs obtain food?
consume other organisms
What is respiration?
The process of breaking down food to release energy
What is asexual reproduction called?
How many parents are required for binary fission?
What is binary fission?
When one cell duplicates its genetic material and divides in half
What is sexual reproduction ?
when two parents combine genetic material information to produce offspring
What is conjugation in bacteria?
one cell transfers genetic material the other
What is an endospore?
a small, rounded, thick-walled, resting cell that forms inside of a bacteria cell
What do endospores do?
help bacteria survive harsh conditions
Endospores can resist ........... , ........ and ...........
freezing, heating, and drying
How does bacteria help your intestines?
helps digest foods, make vitamins, keep away harmful bacteria
Is there a vaccine for the common cold? Why?
no because over 200 viruses can cause the common cold