This is the descent of different species from a common species over many generations.

Which class of molecules is the most antigenic? polysaccharides lipids proteins carbohydrates

You are looking at a cell through a microscope and see that a tetrad has formed, which phase of meiosis is the cell in? Metaphase I Anaphase I Telophase I Prophase I

Which is a basic unit of a sugar molecule? A) amino acid B) fatty acid C) monosaccharide D) nucleotide Which nitrogen base replaces thymine (T) in RNA? A) uracil (U) B) cytosine (C) C) adenine (A) D) guanine (G) Which is a carbohydrate?

How does the shape of a bacterium affect its ability to acquire nutrients and its mobility?

Adaption that enables an individual to blend with its surrounding

A victim of a physical assault who relives the event repeatedly in his or her mind may be suffering from

How has global temperature changed over the last 1000 years

What factors determine soil consistence?

What are the levels or organization in biology?

In what grade do you take biology I took it in 6th grade, just wondering