Which of the following statements about the properties of life is false?
All organisms have the ability to maintain a constant internal temperature.
Life is organized in a hierarchy fashion. Which of the following sequences correctly lists that hierarchy as it increases in complexity?
Molecule, cell tissue, organ, organ system, organism, population, community, ecosystem.
The tree in your backyard is home to two cardinals, a colony of ants, a wasps nest, two squirrels, and millions of bacteria. Together all of these organisms represent
If you eat a hamburger, you are mainly eating ground-up beef muscle. What levels of organization are represented in this ground-up muscle?
Organelle, cell, and tissue
Which of the following statements about ecosystems is false?
Bacteria and fungi recycle energy within an ecosystem
Which of the following statements regarding a common cellular activity is false?
New cells are derived from cellular components like organelles
Which of the following statements about living systems is false?
Living systems are composed of two or more cells
All organisms belonging to the kingdom Plantae
are photosynthetic and contain cells that are surrounded by cell walls with cellulose
All organisms belonging to the kingdom fungi
include mushrooms and yeasts, and decompose the remains of dead organisms and absorb nutrients from the leftovers
Which of the following observations would provide the strongest evidence that the many different plants that we call orchids are actually related to one another?
they all have the same common ancestor
The teeth of the grain-eating...This illustrates
a result of natural selection and the connection between form and function
An antibiotic kills 99% of a bacterial population. You would expect the next generation of bacteria
to be more resistant to that antibiotic
The role of a control in an experiment is to
provide a basis of comparison to the experimental group
A scientist performs a controlled experiment. This means that
two experiments are conducted, one differing from the other by only a single variable
Which of the following statements best describes a compound
a coumpound contains two or more different elements in a fixed ratio
An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. How many electrons does boron have?
The sodium atom contains 11 electrons, 11 protons, and 12 neutrons. what is the mass number of sodium
Typically nitrogen atoms are composed of electrons, protons, and neutrons.An isotope of nitrogen could
have more neutrons
When full, the innermost electron shell of argon contains __ electrons, and hte outermost shell contains __ electrons
What is the fundamental difference between covalent and ionic bonding?
In a covalent bond, the partners share a pair of electrons; in an ionic bond, one partner accepts electrons from the other
Which of the following statements regarding the oxygen atom of a water molecule is true?
oxygen is more electronegative than the hydrogen atoms
A person shakes up vinegar and oil dressing before pouring it on salads. What is the chemical reason for doing this?
Vinegar contains charged water molecules, while oil is neutral and repels water.
The hydrogen atoms of a water molecule are bonded to the oxygen atom by ___ bonds, whereas neighboring water molecules are held together by ___ bonds.
___ are weak bonds that are not stong enough to hold atoms together to form molecules that are strong enough to form bondswithin and around large molecules
Which of the following will contain more heat but has a lower temperature
an Olympic-sized heated indoor swimming pool
Household ammonia has a pH of 12; household bleach has a pH of 13. Which of the following statements about the, is true
The ammonia has 10 times as many H+ ions as the bleach
Which of the following statements about acid precipitation is false is false
acid precipitation has little or no effect on soil chemistry
The emission of ___ and ___ are primarily responsible for acid precipitation
nitrogen oxides...sulfur oxides
Which of the following statements about acid precipitation is false
some chemical reactions create electrons; others destroy them
The hydrogen bonds shown in this figure are each
between an oxygen and a hydrogen atom of different water molecules
Which of the following statements regarding carbon is false
carbon has the capacity to form polar bonds with hydrogen
You now know that the old cliche 'oil and water don't mix' is true. Why?
Water exhibits polarity and oild does not.
Which of the following statements about the functional groups of organic compounds is false?
All functional groups include a carbon atom of the organis compounds skeleton
Which of the following statements about the monomers and polymers found in living organisms is false?
Monomers are joined together by the process of hydrolysis.
Which of the following statements about dehydration synthesis is false?
Animal digestive systems utilize this process to break down food
An oil may be converted into a substance that is a solid at room temperature by
adding hydrogens, decreasing the number of double bonds in the molecules.
Which of the following statements regarding the triglyceride molecules is false
triglycerides are part of a signal pathway
Which of the following statements regarding nucleotides is false?
nucleotides have a nitrogenous base base backbone
These two molecules are structural isomers. What is the difference between them?
the location of a double-bonded oxygen atom.
...which hypothesis is likely to be more productive for their initial investigation
th three-dimensional structure of the proteins may have been altered
based on your understanding of enzyme structure, which of the following would you recommend that they also investigate?
the temperature of the liquid in the washing vat
....which of the following instruments would be best and why?
a light microscope because it allows observation of whole, live cells.
The idea that all living things are composed of cells and that all cells come from other cells defines
A scanning electron microscope is used to study ____, whereas a transmission electron microscope is used to study ____
cell surfaces...internal cell structures
a cell is exposed to a sunstance that prevents it from dividing. The cell becomes larger. this situation
will eventually be problematic, since the cell's ability to absorb nutrients though its outer membrane will not keep increasing as quickly as its cytoplasmic needs
The membranes compartmentalization of a cell
allows different metabloic processes to occur simultaneously
Unlike animal cells, plant cells have __ and __. unlike plant cells, animal cells have __
What would you expect to find when looking through a SEM at a cell with an enzyme that cleaves proteins at their hydrophilic amino acids?
a cell surface that is devoid of any major structures
The two main functions of the rough endoplasmic reticulum are the production of
membrane and proteins secreted by the cell
Which of the following statements regarding the Golgi apparatus is false?
the Goldi apparatus decreases in size when a cell increases its protein production
Which of the following statements about lysosomes is false
lysosomes synthesize proteins from the recycled amino acids
when a cell is deprived of oxygen, its lysosomes tend to burst and release their contents into the cell. As a result of this, the cell will
undergo self-digestion and die
which of the following statements about the functions of a plant cell central vacuole is false
the central vacuole of the cell may digest chemicals for recycling