If adenine makes up 20 percent of the bases in a sample of double-stranded dna, what percentage of the bases would be cytosine? 35 70 30 40 15

Which variable has the least effect on enzyme activity? A. Temperature B. Light intensity C. pH D. Substrate concentration

What causes weathering

What are the three primary energy molecules?

Chloroplast thylakoids are frequently stacked to form these disk

Why don't scientists stop with the first step in the Scientific Method, making observations?

It is good practice to autoclave all cultures before disposal, even if the culture is of a non-pathogenic organism. Autoclaving not only kills the cells in the culture, but denatures and destroys proteins and nucleic acids.

Kiera and Grace are sisters. They both have blue eyes. Kiera is extremely short for her age and Grace is exceptionally tall for her age. Develop a hypothesis as to why the sisters have different statures.

This diagram illustrates the three types of plant tissue. A diagram illustrates the 3 types of plant tissue. Small purple structures inside of the leaves, stem, and roots are shown.

If the diploid number of chromosomes for an organism is twenty-six, what is the haploid number?

Describe two negative effects that water pollution can have on the environment. Explain one way water pollution can be reduced.