Bacteria can flourish in almost every environment in the world.
100
What is parasitism?
A non mutual relationship between two organism, where one benefits at the expense of the other.
100
What is food used for other than energy?
Food also provides structural material.
200
What eventually happens when a cell is invaded by a virus?
The cell lyses or dissolves and eventually dies.
200
Why do bacteria have an advantage over human in terms of survival?
Bacteria can rapidly reproduce every 20-30 minutes so in case of an extreme event they can quickly adapt.
200
How does a pathogen enter a host body?
Through breaks in the skin, inhaling, through food, or by rubbing your eyes.
200
Where does an ectoparasite live?
They live on the outside of the host body.
200
Why were spices so valuable during the spice trade?
Spices were able to preserve food which made them expensive and valuable.
300
Give one way a virus enters a cell.
The viruses membrane fuses to a cell then the virus slowly penetrates the cell or the virus is consumed by the cell.
300
Why is a J shaped population growth impossible to sustain?
The supply of nutrients would have to be unlimited which its not so it is impossible to sustain this growth.
400
What is a pro-virus?
When a virus becomes part of an organisms DNA.
400
List a few things that bacteria need to grow.
Energy, nitrogen, carbon, oxygen, phosphorus, calcium, water, and minerals.
400
What are toxoids and how are they different from toxins?
Toxoids are no longer toxic like toxins but can still stimulate antibody production.
400
What are social parasites?
Parasites that take advantage of interactions between members of social organisms.
400
What preservation method was developed for Napoleon's army?
Steralization.
500
The virus takes over a protein and those proteins are transcribed by the tRNA and is replicated.
How does a virus reproduce?
500
What can microbes digest?
Microbes can digest a wide range of items like cellulose, sulfur, and some plastics.
500
How are pathogens that produce variant antigens hard to control?
The variant antigens are constantly changing so every time the body responds with antibodies the variant antigen creates a new variant that escapes.
500
What is the overall effect of a parasite on a host?
Overall the effect is negative.
500
How does drying food preserve it?
Drying food evaporates the water and the osmotic pressure increases to were the microbes are unable to compete with the water binding molecules in the food.