Which of the following molecules is the subunit of DNA that links together to form strands of DNA?

A.

a phosphate base

B.

a polymerase

C.

a codon

D.

a nucleotide

What are three factors that impact ecosystems and explain how?

What structure of a protein is the arrangement of polypeptides?

Based on the information provided, what can be concluded about the unknown cell? Since the cell lacks a cell wall, it must be a plant cell. Since the cell lacks chloroplasts, it cannot be a prokaryotic cell.

What happens to your shadow as the day goes on? (length wise)

What two organ systems do white blood cells belong too?

Would lactase be able to brake down sucrose?

A persons skin and heart cells both have a complete copy of all of the persons chromosomes. Each cell however makes different types of protien to perform its function.

Which characteristic could be observed in an organism classified in kingdom protista

Most body systems maintain homeostasis through

Explain how medical interventions are used in the diagnosis of disease.