Why are most factors held constant in a scientific experiment?

Jacob described two layers of Earth's atmosphere. Layer A: Contains the air we breathe Layer B: Absorbs x-rays Which statement is most likely true? Layer A is the troposphere and Layer B is thermosphere.

What process is used to replicate dna in a lab for testing

Which of the following is true for DNA but not RNA? Release of PPi from the monomer provides the energy for polymerization. It has 4 different bases. It has secondary structure. None of the above; all are true for both DNA and RNA

How do sociologists examine the social world using both history and biography? In relation to this subject matter, what is macrosociology? What is microsociology?

Part of normal brain development is the loss of unused dendrite connections. this loss, however, is not a degradation of brain power because with it there is a corresponding improvement in the:

What are seven places that carbon exists?

What's the mass of a double mint gum?

Which phase of meiosis I is responsible for dividing the cytoplasm? - prophase I - metaphase I - anaphase I - telophase I

Phrase to make it true. 1. Gene regulation is the ability of an organism to control which genes are transcribed.

Which of the following are tenets of the cell theory a. cells are the building blocks of life b. cells all arise from pre existing cells c. cells are the basic living units of structure an function d. all of above