Identify this symbol.

OH -

anion

cation

atom

molecule

Which of the following must happen before the cell can go through mitosis? A. The cytoplasm must divide. B. The cell must copy its DNA. C. The spindle fibers must break down. D. The sister chromatids must separate.

In some freshwater organisms there is a structure called a contractile vacuole that regulates water movement into and out of the cell. What explains the existence of the CV?

How do we know what happened on Earth before humans were around?

Where does carbohydrate production occur in a chloroplast? A. In the cytosol B. In mitochondria C. In the thylakoid D. In the stroma

Genes are unable to determine a person's a. eye colorb. athletic abilityc. number of teethd. shape of earlobes

Describe the role of stem cells in multicellular organisms

At its peak, the Roman Empire encompassed a land area that included present-day A. China B. Poland C. Spain

Developmental psychology is the field that primarily studies how humans grow and develop.

Why can polyploidy individuals lead to speciation fairly quickly?

The primary care provider has prescribed a karyotype for a newborn. the mother questions what the type of information that will be provided by the test. what information should be included in the nurse's response?