Answer:
Heritable variations exist in each population.
Each species seems suited for its particular environment.
A population has more individuals than can be supported by the environment.
Explanation:
 
        
             
        
        
        
Answer:
B. He was the first to observe live cells in a sample of pond water.
Explanation:
He was a self taught man that created the first microscopes which allowed him and others to see tiny organisms. 
The other answers are not correct as Hans made the first microscope, cells existing in liquids were not a critical part of micro biology, and it was Schlieden and Schwann who created the cell theory that stated that all living things were made of cells. 
 
        
             
        
        
        
Answer:
The correct answer is - the hippocampus.
Explanation:
Hippocampus is the part of the brain located deep in the temporal lobe that is related to memory and learning abilities. The hippocampus is present in humans and other mammals, two in numbers.
Injuries to the hippocampus will be lead to problems that are associated with a memory like recognition and identifying people or things or the ability to learn things. Direction, locations type of memories would be affected if damaged.
 
        
             
        
        
        
Answer:
C. A fossil is any trace of prehistoric life
Explanation:
None of the other answer choices are reasonable enough to be true. I hope this can help you!