What distinguishes a hypothesis from a theory? A. A theory is a scientific explanation. B. A theory is testable. C. A theory explains a natural phenomenon. D. A theory is backed up by repeated observations and tests.

A wood block has a mass of 27g. It has a length of 9 cm, a width of 3cm and a height of 1cm. What is the density of the block? (Hint, don’t forget to find the volume of the wood. Volume = LxWxH) 1 g/mL 9g/mL 1 g/cm3 9g/cm3

While examining a specimen under the microscope, Janet discovers a structure that has some genetic material that has RNA but not DNA. What is the specimen? A. virus B. plant C. fungi D. bacteria E. animal

If a solution is considered to be basic, which of the following is true about the hydroxide ion concentration?

Specific immunity is associated with antibodies. true or false

How do stabilizing and disruptive selection differ?

The differences between hashimotos' thyroiditis and grave's disease include b. only hashimoto's is a type ii hypersensitivity a. only grave's disease is an autoimmune disease c.

How could natural selection lead to evolution?

What algae is golden brown and one of the most common of all the unicellular organism in the ocean?

What is the name of the enzyme that adds new nucleotides to build mrna

If two people want to know the chances of their child have a certain genetic disorder, the parents must know their