In a scientific experiment how many independent variables should be tested at the same time

Strawberries can reproduce by means of runners, which are stems that grow horizontally along the ground. At the region of the runner that touches the ground, a new plant develops. Why is the new plant genetically identical to the parent?

Trace elements are sometimes referred to as

When estuarine water forms layers of different density that do not mix, what is it is called?

How does kidney disease affect the immune system? A. it strengthens it B. it weakens it C. it does not affect it D. none of the above

The transcription terminator stops DNA polymerase, AND results in the polymerase falling off the DNA template. adds a terminator nucleotide to the RNA, AND results in a hairpin loop structure in RNA.

A bacteria population triples in number each day. if there are 2, 551,500 bacteria on the seventh day, how many bacteria were present on the first day?

What is another name for major depressive disorder?: a. unipolar depression b. double depression c. dysthymia and) seasonal affective disorder?

Which term is the name of the diploid stage of this plant life cycle? A. Gametophyte B. Sporophyte C. Sperm D. Egg

What is a specific measure to which other measures are compared to ensure uniformity?

What cells are specialized for responding to environmental stimuli?