RIO BIO 156 EXAM 1 NEWEST - CTUAL

• | P a g e

RIO BIO 156 EXAM 1 NEWEST - CTUAL

EXAM COPLETE 100 QUESTIONS AND CORRECT

DETAILED ANSWERS ( VERIFIED ANSWERS )

|ALREADY GRADED A+

Distinguish between a producer, a consumer and a decomposer.

• ANSWER- and convert that light energy into chemical bond energy. such as

some bacteria, protists, and all plants

consumer: organisms that feed on already-stored food

decomposer: bacteria and fungi recycle the dead molecules

throughout the bioshpere.

Distinguish between a hypothesis and a prediction. - ANSWER-

hypothesis: testable explanation of a natural phenomenon.

prediction: statement based on hypothesis about a condition that

should exit if the hypothesis is correct.

What is meant by the phrase potentially falsifiable hypothesis? - ANSWER- a hypothesis can be proven that is false

Define the term control group and explain the value of a control group in an experiment. - ANSWER- Group of individuals 1 / 3

• | P a g e

identical to an experimental group except for the independent variable under investigation To provide a basis of comparison to the experimental group

Define the term theory and explain the point in which a hypothesis becomes a theory. - ANSWER- Suppose a hypothesis stands even after years of tests.It is consistent with all data ever gathered, and it has helped us make successful predictions about other phenomena.

Explain how electron configuration influences the chemical properties of an atom. - ANSWER- Each cloud can hold a determinant number of electrons. When the electron number changes, ions are formed. The number of electrons influences the bonding between atoms.

hydrogen bond - ANSWER- The electron from the hydrogen spends most of its time around the oxygen atom creating a partial positive charge on each hydrogen. The presence of additional electrons makes the oxygen partially negative.

covalent bond - ANSWER- two atoms share a pair of electrons, so that each atom's vacancy becomes partially filled 2 / 3

• | P a g e

ionic bond - ANSWER- Type of chemical bond in which a strong mutual attraction links ions of opposite charge.

Describe how water contributes to the fitness of the environment that supports all life. - ANSWER- 1. an excellent solvent

• has cohesion (insect on water, water roots)
• stabilize temperature (cool surface)

Explain the basis for the pH scale. - ANSWER- The basis for the pH scale is the amount of H+ and OH- ions in a solution.More H+ ions means a solution is more acidic, while more OH- ions means the solution is more basic.

List and describe the four major classes of organic compounds. - ANSWER- carbohydrate lipid protein nucleic acids

Describe the structure of an atom - ANSWER- protons neutrons electrons

• / 3