6. What makes plastic bottles a big concern in oceans but not other materials such as metals, wood or paper materials? 3 points
Bottle caps are light weight and MORE dense than water, so they float.
Water bottles are made of PET plastic, which is LESS dense than the ocean water so they sink to the bottom.
Bottle caps are light weight and LESS dense than water, so they float.
Water bottles are made of PET plastic, which is MORE dense than the ocean water so they sink to the bottom.

1. an enzyme is considered a(n) because it speeds up a chemical reaction without being used up.2. in a catalyzed reaction, a reactant is often called a(n) . an enzyme is specific because the shape of its matches only particular reactants.4. an enzyme speeds up reactions by lowering the . the between an active site and its substrate often strains bonds and the reaction proceed.6. a( , which is often a vitamin, binds to an enzyme and plays a role in catalysis.7. high temperatures or changes in ph can an enzyme, causing it to lose its shape and biological activity.

Which statement correctly compares metaphase i and metaphase ii? in metaphase ii twice as many chromosomes line up along the middle of the cell as in metaphase i. in metaphase i twice as many chromosomes line up along the middle of the cell as in metaphase ii. in metaphase ii twice as many chromosomes are pulled to opposite ends of the cell as in metaphase i. in metaphase i twice as many chromosomes are pulled to opposite ends of the cell as in metaphase ii.

Three applications for admission to a local university are checked, and it is determined whether each applicant is male or female. the number of sample points in this experiment is