7. The cell theory was

a. first identified in 1665

b. the end result of many scientific investigations

c. described by Rudolf Virchow

d. Both (a) and (b)

List two similarities between fish and humans on the basis of taxonomy.

Name the structures that plant cells have that animal cells do not ...

Name and describe 4 ways animals use energy

Part i a. what happened when you brought the rubbed ruler close to the paper, salt, and pepper? 1. were all three substances affected equally? 2. what explanations can you offer for why this happened? b.

Explain the difference between blood types AB and O.

A 5-year-old girl catches the flu from a friend at day care after the friend sneezed and wiped mucus on a toy that the girl played then with. In this case, what is the portal of exit in the chain of infection?

Why does a tiger look so much different as an adult

Why do you think some nerve cells are long and thin?

What is the name of the macromolecules that makes up DNA

How many cells does meiosis produce