Biology Fundamentals
Which of the following levels of biological organization is arranged from most complex to least complex?
A) Organism, molecule, cells, organs
B)Organism, biosphere, population, ecosystem
C) Molecules, cells, tissues, organs
D) Organism, organs, tissues, molecules
D) Organism, organs, tissues, molecules
True/ False: The formation of nonpolar covalent bonds will result in partial charges of both atoms
False.
Water is a very versatile solvent because water molecules are ________
A) Hydrophobic
B) Ionic
C) Nonpolar
D)Polar
D) Polar
A covalent bond is likely to be polar if:
A) it is between two atoms that are both very strong electron acceptors.
B) The two atoms sharing electrons are of the same element.
C) The two atoms sharing electrons are equally electronegative.
D) One of the atoms sharing electrons is more electronegative than the other.
D) One of the atoms sharing electrons is more electronegative than the other.
Geese share their pond with ducks, fishes, grasses, and many kinds of insects make up which level of classification?
A) Community
B) Biosphere
C) Population
D) Ecosystem
A) A community.
For most atoms, when is an unreactive configuration of electrons attained?
A) When the atom has eight electrons in its outmost shell.
B) When the atom has as many protons as neutrons.
C) When the atom has moved all of its electrons to its outermost shell.
D) When the atom achieves a zero net charge.
A) When the atom has eight electrons in its outmost shell.
Oil does not mix with water because it is __________________.
A) hydrophobic
B) hydrophillic
C) polar and hydrophillic
D) nonpolar and hydrophobic
D) nonpolar and hydrophobic
Hydrogen bonds form between hydrogen and a strongly ___________ atom.
Electronegative.
Name the four elements that most living things are composed of.
Carbon, Hydrogen, Oxygen, Nitrogen
An element has eight protons, nine neutrons, and eight electrons. Its atomic number and atomic mass, respectively, are ____________________.
A) 8 and 16
B) 8 and 17
C) 9 and 16
D) 9 and 17.
B) 8 and 17
The phenomenon most responsible for maintaining the upward movement of water through vessels in a tree is :
A) cohesion
B) adhesion
C) surface tension
D) hydration shells
A) cohesion
Measurements show that the pH of a particular lake is 4.0. What is the hydrogen and hydroxide concentration of the lake?
H+ =10-4
OH- = 10-10
Which of the following is an attribute of living things?
A) They must be dependent on oxygen
B) They must utilize energy from sunlight, either directly or indirectly.
C) They must be able to reproduce sexually.
D) They must be capable of acquiring adaptations through evolution.
D) They must be capable of acquiring adaptations through evolution.
Which statement is true of all atoms that are cations
A) atoms gain a positive charge due to gaining another e-
B) atoms gain a negative charge due to gaining another e-
C) atoms gain a positive charge due to losing an e-
D) atoms gain a negative charge due to losing an e-
C) atoms gain a positive charge due to losing an e-
Ice floats on liquid water because it has a lesser degree of this.
Which statement describes a reversible ruction that has reached chemical equilibrium?
A) The rate of the reverse reaction equals the rate of the forward reaction.
B) The forward and the reverse reactions have stopped.
C) The rate of the reverse reaction exceeds the rate of the forward reaction.
D) The concentration of the reactants is equal to the concentration of the products.
A) The rate of the reverse reaction equals the rate of the forward reaction.
Sweating to maintain a stable internal environment when it's too hot represents which property of life?
A) Growth and Development
B) Energy Processing
C) Regulation (Homeostasis)
D) Metabolism
C) Regulation
All of the following are true of ionic bonds except:
A) Atoms that gain an electron are called anions
B) Electrons are completely transferred during bonding
C) Atoms gain partial charges as a result of the transfer of electrons
D) Cations are positively charged ions
C) Atoms gain partial charges as a result of the transfer of electrons
Na+Cl-, a polar molecule is added into an aqueous solution.
A) How will NaCl react with water
B) Is this molecule hydrophillic or hydrophobic?
dissolve; water will form hydration shells around the two atoms
HYDROPHILLIC
Which action would involve the greatest transfer of heat?
A) condensing 5 g of steam to liquid water
B) evaporation 1 g of water at 25 degrees C
C) changing the temperature of 1 g of water from 10 degrees C to 90 degrees C
D) Cooling 10 g of water from 80 degree C to 40 degrees C
A) condensing 5 g of steam to liquid water