In the DNA helix, which part of the nucleotide forms the sides of the ladder, the backbone? A. Pentose sugar and Nitrogen base B. Pentose sugar and Phosphate group C. Nitrogen base and Carboxylic acid D. Phosphate group and Carboxylic acid

In a population that meets the Hardy-Weinberg equilibrium assumptions, 81 percent of the individuals are homozygous for a recessive gene.

Of the planets listed which is closet to the sun

The general purpose of speech sound,?

When would the largest adaptive radiation of species occur? A-during mass extinction events B-immediately before mass extinction events C-immediately after mass extinction events D-50 million years after a background extinction event

Heterotrophic organisms receive their energy directly from the sun. true false

Considering the carbon cycle, which of the choices would result if a large area of forest were burned?

What is the term used to describe relatively small areas with unusually high concentrations of species found there and nowhere else, including many species in high risk of extinction? These areas receive the focus of global conservation efforts.

Explain four unique properties create an environment hospitable to life

How do crickets obtain energy.?

Which type of stars is very hot but gives off little light? dwarfs giants main sequence stars nebula