BIOLOGY MIDDLE SCHOOL

How does your body stop viral infections? What are ways of protection against viral infection?

Answers

Answer 1
Answer: A division of your immune system called cell mediated immunity is charged with stopping viral infections. The main actors of that are called cytotoxic T cells who, when they encounter a cell that is displaying viral antigens on its surface, binds to the cell and releases toxic substances called perforins and granzymes that destroy and digest the viral infected cell.
Answer 2
Answer: I think its because the white blood cells stops the infections before it can infect the body I don't really know

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In your garden, you are growing several plants of the species Florus imaginarium. You have observed that some of the individuals have leaves with rounded tips and others have leaves with pointed tips. One of these traits is dominant and the other is recessive. Assuming all the plants in your garden are true-breeding, how would you go about determining which trait is dominant and recessive?

Why does nodding of the head signify Yes and shaking of the head No?

Answers

Children pick up on everything around them in their life, weather you like them to or not. one the fist acts of shaking you head came from children. when they would be they would turn there head to signify something they did not want. children would also see you moving your head up and down when you do something good, or when someone is happy. this would signify something was good. they would express there emotions by these gestures. Charles Darwin wrote a book on this. I hope this helps!

Answer: It is just the way it has been throughout history.

Explanation:

What is a group of cells called

Answers

A group of cells are called organ tissue. The way an organism is created is by the following:-

Atoms ----> Molecules -----> Macro molecules -------> Cells ------> Organ tissue -----> Organs -----> Organism  

Good Luck! :P

Do oxygen molecules go into or out of the cell

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Both, They have to get the oxygen on the inside then get it out to supply it.

Who won the battle of somme? explain

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Neither side really won. The British and French, who started the battle, won some ground, but it wasn't much and their casualty rate was very high. The British & French lost about 620,000 men; the Germans lost about 500,000. 

The goal of the battle was to make a breakthrough against the German lines and to take some of the pressure off of French troops who were fighting the Germans at Verdun. I believe the casualties were higher at the Battle of the Somme than at Verdun.

Which kind of organism is found at the end of a food chain?

Answers

Which kind of organism is found at the end of a food chain?

A Decomposer is your answer
Herbivores are found at the end of a food chain

What are the possible genotypes if the offspring

Answers

Answer:

50%

Explanation:

The reason why it is 50% is because the offspring gets 50/50 from both parents
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