What makes up the backbone of a dna molecule?

In human population X, consider the simple Mendelian trait for freckles. F is the dominant allele and f is the recessive allele. Individuals who are homozygous dominant (FF) or heterozygous (Ff) for the trait express freckles.

1. The snow is making driving conditions very dangerous. But I must still go out and vote even though my candidate has no chance of winning. 2. Smallpox is no longer a threat to anyone in the United States.

The decline and extinction of many predatory animal species is most probably the result of

Abiotic components of a community include all of them except

Natural selection does not always result in an increase in genetic diversity.

If there are 50 kcal of energy in the tertiary consumer trophic level, how many kcal would you expect to find in the primary consumer level

The plasma membranes of some plant cells use transport proteins to move protons out of the cell against their concentration gradient (from areas of low proton concentration to areas of high proton concentration). this is an example of:

What is algae? and where is come from?

Are mushrooms biotic or abiotic

What type of blood vessels join arteries to veins