BIO TEST 1

• One of the properties of science is that it is tentative. What does tentative mean with respect to the nature of science?

  It means scientific understanding, is subject to change if new experimental data is obtained that clarifies our understanding
• A theory in science is...

  a well supported explanation of a wide range of phenomena
• Which of the following best describes a scientific hypothesis?

  A possible explanation for an observation of a phenomenon
• A(N) is a general statement that there is no relationship between two measured variables

  Null Hypothesis
• A paradigm is?

  A dominant view
• Which of the following is correct regarding a hypothesis?

  After sufficient testing, you accept it as probable, being aware that it may be revised or rejected in the future.
• The ____ hypothesis often refers to what a researcher attempts to prove through experimentation.

  Alternative
• A scientist investigates the result of varying temperatures on the growth rate of a bacterial culture. In this experiment, what temperature would be?

  Independent Variable
• The control group in an experiment is?

  allows a standard of comparison for the experimental group
• An experiment?


  is an activity designed to test the validity of a hypothesis
• All the populations of a particular kind of an organism are members of the same?

  species
• A biological community is?

  includes all population of all species in an area
• The level of organization where factors such as sunlight, rainfall, and temperature enter the picture is the...

  Ecosystem
• Which is the smallest unit of life that can survive and reproduce on its own?

  A cell
• The most inclusive level of organization listed here is an ?


  An organ
• The blood sugar level is maintained within a fariliy narrow range, despite uneven intake of sugar, is due to the body's ability to carry out what?

  Homeostatisis
• absorb all the nutrients they need to survive from their host and so have no digestive systems, over many generations, their genome changed. This is ....?

  Evolution
• The instructions for growth and development are in..?

  DNA
• A(n) ___ property is a characteristic of a system that does not appear in any of its component parts..?

  Emergent
• Which of the following scientific names is correctly formatted?

  Cryptobranchus allegeaniensis
• Which includes the other four?

  Molecules
• Magnesium has 12 protons, How many electrons are in its third energy level?

  2
• Phosphorus has 15 protons. How many electrons are in its first energy level?

  2
• WHich of the following is false about covalent bonds?

  In polar covalent bonds, electrons are shared equally
• When water evaporates...?

  First three options
• An atom that gas gained or lost one or more electrons is...?

  An ion
• A hydrogen bond is?

  A week attraction between a convently bonded hydrogen atom and another atom taking part in a separate polar covalent bond
• For an atom to be neutral, it must have the same number of?

  Electrons & Protons
• Sugar dissolves in water because its...?

  is polar and forms many hydrogen bonds with water molecules.
• Why does ice float on water?

  Water molecules have space father apart in ice than in liquid water
• When an electron is transferred fro one atom to the next, and the two atoms are then electrically attracted to one another, the type of bond is..?

  An ionic bond
• Carbon has 4 electrons in its outer electron shell, therefore..?

  It can form 4 single covalent bonds
• Isotopes are forms of an element that differ from one another by having different...

  Mass numbers
• The partial separation of charge in the water molecule...

  All of the above
• Which of the following is false concerning the atom in the figure?

  The first energy label has a vacant electron orbitals
• Nitrogen has an atomic number of 7. How many hydrogen atoms, which have an atomic of 1, are necessary to join with nitrogen to form a stable compound?

  3
• 5 exclusive characteristics that all life shares in common.

  Celluar organiziation:

  Metabolism:

  Homeostasis:

  Growth and Reproduction:

  Heredity: DNA passes info to the next generation
• Describe the quality control process.

  It's where scientists carry out testing and analysis to ensure that biomedical research and products meet specifications and regulatory guidelines.