Biology FINAL EXAM

Which group of organisms are thought to have given rise to plants and animals?

Protista

the process by which living organisms maintain a fairly constant internal environment despite changes in the external environment is known as

Homeostasis

Molecules such as water that are electrically neutral overall but still have partially charged regions are referred to as

polar molecules

a scientist has split an atom and collected all the subatomic particles located in the nucleus of the atom. Which of the following has he collected? A) protons and neutrons B) electrons and protons C) protons D) neutrons and electrons E) electrons

protons and neutrons

A student measuring the pH of the water in a fish tank found it to have a pH of 8. Which of the following statements is true regarding that solution? A) the water contains equal numbers of hydrogen ions and hydroxyl ions B) the water is more alkaline than the solution with a pH of 10 C) The water is highly acidic D) the water does not contain hydrogen ions E) the water is alkaline

the water is more alkaline than the solution with a pH of 10

Which of the following statements regarding scientific theory is FALSE? A) As new information is gained over time, scientific theories can be modified B) A scientific theory explains scientific facts with a high degree of reliability C) A hypothesis that has been repeatedly tested over time, and found to be true, usually becomes a scientific theory D) The highest status that a hypothesis can achieve is becoming a scientific theory E) A scientific theory is a speculation as to the possible outcome of an experiment

A scientific theory is a speculation as to the possible outcome of an experiment

Which of the following is a true statement: A) All living things are made up of at least one cell B) Cells arise spontaneously from non-living chemical elements C) Molecules are considered to be the smallest unit capable of exhibiting all the characteristics of life. D) Cells are incapable of maintaining homeostasis because they are too small E) Organisms composed of many cells are unicellular

All living things are made up of at least one cell

Which of the following is prokaryotic? A) Eukarya B) Protista C) Animalia D) Archea E) Primates

Archaea

The branch of science that studies living organisms and their life processes is

Biology

Which of the following is a correct statement regarding metabolism: A) Animals use energy obtained directly from the sun and chemicals obtained from plants, other animals, air, and water B) Few living organisms require raw materials and a constant source of energy C) Cells do not require energy to change molecules from one form to another D) Plants get the raw materials they need for life processes entirely from air E) Cells maintain life through the breakdown of molecules and energy by chemical and physical processes.

Cells maintain life through the breakdown of molecules and energy by chemical and physical processes

T/F: special interest group are not permitted to post information as "science" on the internet unless it has undergone peer review.

False

Which of the following is true regarding knowledge gained through scientific investigation? A) This knowledge can be used to prove or disprove religious beliefs B) Scientific knowledge cannot be used to improve human life through technology C) Society as a whole general ignores scientific information D) This knowledge has resulted in less efficient sources of energy yet better health care E) This information can be used to detect problems at an early age and correctly mistakes

This information can be used to detect problems at an early age and correct mistakes

T/F: Approximately 3.5 billion years ago, single-celled organisms arose from non-living chemical elements.

True

T/F: The theory of common descent states that the more similar 2 organisms are, the more recent their common ancestor

True

The most important physical characteristic of lipids with regard to living organisms is that they A) are typically a form of waste product that is difficult to eliminate B) dissolve easily in water C) are more dense than water D) are very large and therefore difficult to store E) are hydrophobic

are hydrophobic

Which of the following characteristics applies to both living organisms and nonliving things? A) are made up of cells B) are capable of growth C) have the ability to store energy for later use D) are capable of reproduction E) are made up of matter

are made up of matter

Which of the following best describes the proper sequence of steps involved in the scientific method? A. state hypothesis B. observe C. experiment D. support or disprove hypothesis E. form a prediction A) e,b,a,c,d B) a,b,c,d,e C) b,a,d,e,c D) b,a,e,c,d E) a,b,c,e,d

b,a,e,c,d

Hydrolysis reactions are important in biological systems A) due to their role in the build up of food molecules during metabolism B) because they promote the absorption of energy when covalent bonds are broken C) since these reactions are associated with anabolism D) by adding water to break existing bonds E) all of the above are correct

by adding water to break existing bonds

Which of the following is true regarding macromolecules? A) an example of a macromolecule is H2O B) Macromolecules are produced by hydration synthesis C) Cells use certain macromolecules to store energy D) Cells cannot use macromolecules to signal other cells E) cells produce macromolecules by the process of hydrolysis

cells use certain macromolecules to store energy

Which of the following is correct in terms of level of organiztion from least to most complex? A) atoms, cells, organism, organ systems B) cells, tissue, organ, organ system, organism C) atoms, tissue, organs, population D) tissue, organ systems, population, cells

cells, tissue, organ, organ system, organism

A molecule of water forms when one oxygen binds with two hydrogen atoms, completely filling the outer shell of the hydrogen and oxygen. The type of bond linking the atoms together is A) hydrogen B) covalent C) ionic D) disulfide E) polar

covalent

A student needs information from the National Institutes of Health, a government agency. Which of the following endings should he or she look for in the internet address? A) com B) org C) gov D) nih E) edu

gov

With regard to ecosystems, what is the largest problems human create?

habitat destruction

Isotopes of an element have the same atomic number as the more common atoms, but different atomic mass because A) isotopes contain more electrons than the more common atoms B) isotopes contain more protons than the more common atoms C) isotopes contain more neutrons than the more common atoms D) isotopes absorb water from the surrounding environment

isotopes contain more neutrons than the more common atoms

A farmer wants to improve crop yield in his fields by testing the effectiveness of a new pesticide available on the market. Which of the following is the best control for this experiment? A) no new pesticide used on the control field; new pesticide used only on the experimental field B) more water on the control field than the experimental field C) more shade on the control field than the experimental field D) less new pesticide used on the control field than the experimental field E) a higher concentration of new pesticide used on the control field than the experimental field

no new pesticide used on the control field; new pesticide used only on experimental field