Rio Salado Bio156 Lesson 1-2

Front 1

Life is organized in a hierarchical fashion. Which one of the following sequences illustrates that hierarchy as it increases in complexity?

Back 1

molecule → cell → tissue → organ → organ system → organism → population → community → ecosystem

Front 2

The tree in your backyard is home to two cardinals, a colony of ants, a wasp's nest (a colony of wasps), two squirrels, and millions of bacteria. Together, all of these organisms represent

Back 2

a community.

Front 3

The ultimate source of energy flowing into nearly all ecosystems is

Back 3

sunlight

Front 4

A consumer eating a producer represents

Back 4

a transfer of chemical nutrients and energy.

Front 5

The formation of systems typically results in the appearance of novel characteristics called

Back 5

emergent properties.

Front 6

A scientist examining a group of cells under the microscope notices the presence of nuclei within these cells. Chemical tests reveal that each cell is photosynthetic and is surrounded by a wall composed of cellulose. These cells must come from an organism that is a member of the Kingdom

Back 6

Plantae

Front 7

Which one of the following statements is not consistent with Darwin's mechanism of natural selection?

Back 7

Individual organisms exhibit genetic change during their life spans to better fit their environment.

Front 8

A hypothesis is

Back 8

a tentative answer to some question.

Front 9

A scientist performs a controlled experiment. This means that

Back 9

two experiments are conducted, one differing from the other by only a single variable.

Front 10

The nucleus of an atom contains

Back 10

protons and neutrons

Front 11

Your instructor asks you to look into your microscope to see a prokaryotic cell. You will be looking for a cell that

Back 11

has a membrane, but no nucleus.

Front 12

Which of the following statements about radioactive isotopes is/are true?

Back 12

The energy emitted by radioactive isotopes can break chemical bonds and cause molecular damage in cells.

Front 13

The smallest unit of an element is

Back 13

an atom

Front 14

In conducting a proper scientific experiment, which of the following would you NOT do?

Back 14

Change the data that you collect so that it matches how you thought the experiment would come out.

Front 15

A(n) __________ forms when two atoms share electrons.

Back 15

covalent bond

Front 16

The term biodiversity refers to

Back 16

the tremendous variety of life all around us on Earth.

Front 17

In plants, the transport of water from roots to leaves against the force of gravity is possible due to this property of water:

Back 17

Cohesion.

Front 18

The ability of water molecules to form hydrogen bonds with other water molecules is critical to

Back 18

all)
evaporative cooling of skin surfaces.
the movement of water from the roots of a tree to its leaves.
the milder temperatures of coastal regions compared to inland areas.
the ability of certain insects to walk on the surface of water.

Front 19

As ice melts,

Back 19

hydrogen bonds are broken.

Front 20

A solute is

Back 20

the substance that is dissolved in solution.

Front 21

Compared to a solution of pH3, a solution of pH1 is

Back 21

100 times more acidic. 7, 6=10, 5=100, 4=1000, 3=10,000

Front 22

Carbon is able to form an immense diversity of organic molecules because of carbon's

Back 22

all)
tendency to form covalent bonds.
ability to bond with up to four other atoms.
capacity to form single and double bonds.
ability to bond together to form extensive, branched, or unbranched carbon skeletons.

Front 23

Many names for sugars end in the suffix

Back 23

-ose.

Front 24

Which one of the following lists contains only polysaccharides?

Back 24

cellulose, starch, and glycogen

Front 25

A diet high in animal products may increase the risk for atherosclerosis. This is because

Back 25

most animal fats are saturated and some animal products contain trans fats.

Front 26

Sucrose is formed

Back 26

from two monosaccharides by dehydration synthesis.

Front 27

DNA differs from RNA because DNA

Back 27

contains thymine in place of uracil.

Front 28

Glucose molecules are to starch as __________ are to proteins.

Back 28

amino acids

Front 29

Nucleotides
contain nitrogenous bases.
contain sugar molecules.
contain phosphate groups.
can be linked together to form nucleic acids.

Back 29

all
contain nitrogenous bases.
contain sugar molecules.
contain phosphate groups.
can be linked together to form nucleic acids.

Front 30

Genetic information is encoded in the

Back 30

sequence of nucleotides in DNA.