Which is not a kind of conifer?

A) cedar

B) hemlock

C) sphagnum

D) fir

Anthony places a drop of water under a microscope and observes some small objects. He concludes that the small objects are cells. Which choice most likely describes the evidence that Anthony saw?

Movement of molecules down a concentration gradient is an example of

Describe the path that air takes as it enters and passes through the human respiratory system.

How does surface to volume ratio relate to the size of the cell

What would happen if diploid organisms reproduce by sexual reproduction without first producing sex cells through meiosis?

Harmful substances in the environment are called

For a couple of decades, biologists knew the nucleus contained DNA and proteins. The prevailing opinion was that the genetic material was proteins, and not DNA. The reason for this belief was that proteins are more complex than DNA. This is because:

Another word for "fats", these are made up of a glycerol and three fatty acids.

How do doctors know which blood types can be given to people in need of blood?

What is the term for the breakdown of organic sediment into inorganic phosphorous?