The plasma membrane is made chemically of a molecule that has both polar and nonpolar ends and contains inside its structure.

The terrestrial planets are characterized by having a a.) silicate core b.) iron-rich silicate core c.) iron-rich metallic core d.) none of these

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

How are mitosis and meiosis similar?