What is the difference between a primary and secondary source? explain and give an example?

A valid hypothesis must be testable. a. True b. False

Which natural polymers makes up paper

Which causes the pH of a solution to increase? A adding acid B adding base C adding hydrogen ions Dadding protons

Cells that create the water current

Cells from advanced malignant tumors frequently have very abnormal chromosomes as well as an abnormal number of chromosomes. what might explain the association between malignant tumors and chromosomal abnormalities?

Where does mitosis occur

The crucian carp, a Scandinavian fish, thrives in shallow ponds that freeze over during winter. While other creatures in the pond does from lack of oxygen, these carp are able to obtain energy through a biochemical pathway that does not require

Tulang rusuk yang bersambung dengan tulang punggung tetapi tidak berhubungan sama sekali dengan tulang dada

Animals can undergo lactic acid fermentation. A) true B) false

1 What is the structure enters and leaves that regulates what the cell?