The parts of a virus that is typically involved in attachment to a host cell are called  

Which of the following pairings is TRUE?

Bacterial STI infections

. Protista that inhabit aquatic environments often contain a unique structure called a to deal with excess water called a  

Which of the following is the result of endosymbiosis?

Humans are characterized as __________________________based on nutritional type.

Mitochondria evolved from:

Which of the following is the most accurate description of the tree of life?  

In bacteria the pili

Texas ponds and lakes are known to harbor a very dangerous “brain-eating” amoeba called