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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

A community

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

The ultimate source of energy folowing into nearly all ecosystems is


A consumer eating a producer represents

a transfer of chemical nutrients and energy

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

Organisms that are prokaryotes are in the domains

Fungi and bacteria

Which of the following statements about the domain bacteria is true?

All bacteria lack a nucleus

Members of the kingdom animalia

can obtain their food by eating other organisms

What feature is common to prokaryotes, fungi, and plants?

cell walls

Which of the following is a kingdom within the domain Eukarya


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

....These cells must come from an organism that is a member of the kingdom


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

Consider the following statement....This statement is an example of

deductive reasoning

A hypothesis is

a tenative answer to some question

A theory is

an explanation of an idea that is broad in scope with multiple lines of evidence

To be scientifically valid, a hypothesis must be

testable and falsifiable

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 folowing best represents an example of technology

testing for genetic diseases

As the enviroment changes,

natural selection adapts populations to their enviroment

Which level in the hierarchy shown is a community?

Level C

Which of the following organisms belongs to the group represented in Box 1


The four most common elements in living organisms are

C, H, O, N, P, S

Which of the following statements regarding matter is false

Matter can be created and destroyed

Which of the following statements best describes a compound

a coumpound contains two or more different elements in a fixed ratio

In the equation 2 H2 + 2 H20,

only H20 is a compound

Which of the following particles is found in the nucleous of an atom

protons and neutrons

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons


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


Which of the following best describes the atomic number of an atom

the number of protons in an atom

Typically nitrogen atoms are composed of electrons, protons, and neutrons.An isotope of nitrogen could

have more neutrons

A radioactive isotope is an isotope that


When full, the innermost electron shell of argon contains __ electrons, and hte outermost shell contains __ electrons


Table salt is formed when

sodium donates its single outer electron to chlorine

A(n) ____ forms when two atoms share electrons

covalent bond

A hydrogen atom has one electron. How many covalent bonds can hydrogen form?


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.

A water molecule (H-0-H) is held together by

two polar covalent bonds

The hydrogen atoms of a water molecule are bonded to the oxygen atom by ___ bonds, whereas neighboring water molecules are held together by ___ bonds.

polar covalent...hydrogen

___ 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

hydrogen bonds

The tendency of water molecules to stick together is reffered to as


Water's surface tension and heat storage capacity is accounted for by its

hydrogen bonds

As ice melts,

hydrogen bonds are broken

Which of the following will contain more heat but has a lower temperature

an Olympic-sized heated indoor swimming pool

A solution with a pH of 7 is


Compared to a solution of pH 3, a solution of pH 1 is

100 times more acidic

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

A buffer

donates H+ ions when conditions become too acidic

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

What change is occuring in this figure

chlorine is filling its third electron shell

The hydrogen bonds shown in this figure are each

between an oxygen and a hydrogen atom of different water molecules

Organic compounds

always contain carbon

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

The results of dehyrdation synthesis can be reversed by


What is the general function of enzymes within a cell

to speed up chemical reactions

A dissaccharide forms when

two monosaccharides join by dehydration synthesis

Which of the following list contains only polysaccarides

cellulose, starch, glycogen

Foods that are high in fiber are most likely derived from


The storage form of carbohydrates is ___ in animals and ___ in plants


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

Fatty acids with double bonds between some of their carbons are said to be


The development of atherosclerotic disease can result from a diet high in

saturated fats

Which of the following substances is a lipid


Which of the following statements about anabolic steroids is false

they promote bone growth

Which of the following would be correctly classified as a protein


Amino acids can be distinguished from one another by

the chemical properties of their R groups

Glucose molecules are to starch as ___ are to proteins

amino acids

Proteins cannot be denatured by


Which of the following statements regarding nucleotides is false?

nucleotides have a nitrogenous base base backbone

DNA differs from RNA because DNA

contains thymine in place of uracil

Genetic information is encoded in the

sequence of nucleotides in DNA

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

How are these two amino acids attatched together?

amino group to carboxylic acid group

Light microscopes

use light and glass lenses to magnify an image

....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

cell theory

...Which one of the following instruments would be best?

scanning electron microscope

A scanning electron microscope is used to study ____, whereas a transmission electron microscope is used to study ____

cell surfaces...internal cell structures

As cell size increases, the

volume increases faster than the surface area

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

___ cells lack a membrane-inclosed nucleus


The membranes compartmentalization of a cell

allows different metabloic processes to occur simultaneously

..cell walls...and membrane-bound can conclude that the cells

are plant cells

Unlike animal cells, plant cells have __ and __. unlike plant cells, animal cells have __

chloroplasts...cell walls...centrioles

Plasma membranes are permeable to

nonpolar molecules such as CO2

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 nucles of a cell

contains DNA

Long fibers of DNA and protein are called


the function of the nucleus is

to manufacture ribosomal RNA

Smooth endoplasmic reticulum

stores calcium ions in muscle cells

The two main functions of the rough endoplasmic reticulum are the production of

membrane and proteins secreted by the cell

the Golgi apparatus

stores, modifies, and packages proteins

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

Contractile vacuoles

prevent cell from bursting as a result of the influx of excess water

Which organelle is involved in the break down of the fatty acids and the detoxification of alcohol


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