What are the spiral shaped structures in this organism?

During extensive exercise, muscle cells will often utilize all available oxygen to the point that the cell goes into what is called “hypoxia” or low oxygen mode.  When this happens, glycolysis will produce

What is the difference between low density lipoproteins (LDLs) and high density lipoproteins (HDLs)? 

Which of the following amino acids has a polar side chain?   

When structures share similar function but have evolved on different paths they are said to be ______.

Identify the reproductive structure shown.

In comparative anatomy, the forearm of a human and the wing of a bird are said to be ______ structures.

Name a species that is currently evolving.

This is a fossil of what organism?

Below is an image of Alpha-Glucose in its ring form.  Briefly explain why a glucose molecule cannot pass freely through a cell membrane.