Science exam 50 multiple choice, science homework help

QUESTION 1

1. What drives the global atmospheric circulation?

   	a.	ocean circulation
   	b.	radioactive decay of nuclear particles
   	c.	energy of the Sun
   	d.	convection cells within the mantle
   	e.	tides

2 points

QUESTION 2

1. Weather is defined as the state of the atmosphere with regard to

   	a.	temperature.
   	b.	humidity.
   	c.	pressure.
   	d.	cloudiness.
   	e.	all of these are correct.

2 points

QUESTION 3

1. Which of the following are both sedimentary rocks?

   	a.	shale and limestone
   	b.	quartz and marble
   	c.	sandstone and basalt
   	d.	quartzite and salt
   	e.	slate and marble

2 points

QUESTION 4

1. Which of the following is an example of the law of unintended consequences in action at Lake Victoria, Africa?

   	a.	clear cutting of old growth pine trees
   	b.	building jetties on the Lake Victoria shore
   	c.	introducing the Nile perch
   	d.	growing algae for a aquaculture
   	e.	constructing lake-front apartments

2 points

QUESTION 5

1. Which term refers to the particular way an organism obtains matter and energy?

   	a.	ecosystem
   	b.	environment
   	c.	ecology
   	d.	ecological niche
   	e.	habitat

2 points

QUESTION 6

1. The importance of the ozone layer to Earth’s inhabitants is

   	a.	protection from ultraviolet rays.
   	b.	to neutralize the NOx molecules in acid rain.
   	c.	to prevent acid rain.
   	d.	to mediate temperatures in the stratosphere.
   	e.	all of these are correct.

2 points

QUESTION 7

1. Which of the following is not true about all living things?

   	a.	They are subject to the laws of thermodynamics.
   	b.	They are made from more than one cell.
   	c.	They respond to their environments.
   	d.	They need energy to live.
   	e.	They are dependent upon chemical reactions.

2 points

QUESTION 8

1. “Cold-blooded” is a term that can refer to

   	a.	insects and spiders.
   	b.	snakes and crabs.
   	c.	frogs and turtles.
   	d.	turtles and lobsters.
   	e.	all of these are correct.

2 points

QUESTION 9

1. What is NOT a function of the cell membrane?

   	a.	reproduction
   	b.	separates inside from outside
   	c.	transmits materials outside to inside
   	d.	protection
   	e.	isolation

2 points

QUESTION 10

1. Which pair of organelles transfers energy in cells?

   	a.	cytoskeleton and nucleus
   	b.	mitochondria and chloroplasts
   	c.	chloroplasts and nucleus
   	d.	cell wall and vacuoles
   	e.	cell membrane and nucleus

2 points

QUESTION 11

1. In the process of photosynthesis

   	a.	electromagnetic radiation is converted to electric and magnetic energy.
   	b.	electromagnetic radiation is converted to lipids.
   	c.	light energy is metabolized.
   	d.	light energy is converted to atomic energy.
   	e.	light energy is converted to chemical energy.

2 points

QUESTION 12

1. Which is not an example of a lipid?

   	a.	candle wax
   	b.	hair
   	c.	petroleum jelly
   	d.	cell membrane
   	e.	butter

2 points

QUESTION 13

1. One difference between carbohydrates and proteins is

   	a.	the carbohydrate molecule lacks nitrogen.
   	b.	the protein molecule contains more stored energy.
   	c.	the carbohydrate molecule is in butter.
   	d.	only the protein molecule contains iron.
   	e.	only the carbohydrate molecule can form long chains.

2 points

QUESTION 14

1. What is the cellular function of deoxyribonucleic acid?
   1) provides structure to the nucleus
   2) governs all chemical functions
   3) carries inheritance information
   4) serves as an antibiotic for bacteria

   	a.	1
   	b.	2
   	c.	3
   	d.	4
   	e.	Both 2 and 3

2 points

QUESTION 15

1. Which statement about viruses is false?

   	a.	Viruses kill the cell.
   	b.	Viruses are RNA segments coated with protein.
   	c.	Viruses can metabolize.
   	d.	Viruses are DNA segments coated with protein.
   	e.	Viruses use the cell’s enzymes.

2 points

QUESTION 16

1. DNA fingerprinting works to identify criminals because

   	a.	all individuals have the same DNA.
   	b.	no two individuals, except for identical twins, have the same DNA.
   	c.	all individuals have unique DNA.
   	d.	DNA samples are readily available from suspects.
   	e.	DNA can be used to create a criminal profile.

2 points

QUESTION 17

1. What is cancer?

   	a.	a potentially fatal bacterial infection
   	b.	a disease characterized by rampant cell growth
   	c.	a genetic defect expressed in bone or tissue
   	d.	a condition in which cell membranes disintegrate
   	e.	a disease caused by an injury to the mitochondria

2 points

QUESTION 18

1. Which of the following is found in a fossil record?

   	a.	documented changes in a species
   	b.	all fossils found, catalogued, and analyzed since the early sixteenth century
   	c.	10,000 unique phyla
   	d.	more reptiles than insects
   	e.	all of these are correct

2 points

QUESTION 19

1. The “primordial soup” of the Miller-Urey experiments contained

   	a.	a dark brown liquid.
   	b.	lipids.
   	c.	amino acids.
   	d.	fossil fuel
   	e.	a dark-brown liquid, lipids, and amino acids.

2 points

QUESTION 20

1. The first cell on Earth was remarkable because it

   	a.	was quite frugal in using chemical resources.
   	b.	developed effective defense mechanisms.
   	c.	probably contained the same essential amino acids of cells today.
   	d.	required tenacity to seek out the organic molecules it needed to survive and replicate.
   	e.	all of these are correct

2 points

QUESTION 21

1. Earth’s surface has about 10% more water now than it did
   before the volcanic outgassing period of Earth’s early history.

   
   True
   
   False
   

2 points

QUESTION 22

1. Sedimentary rocks may become metamorphic rocks, but
   metamorphic rocks never become sediments.

   
   True
   
   False
   

2 points

QUESTION 23

1. Volcanic rock and extrusive rock are two names for rocks that are
   made when molten material solidifies on the Earth’s surface.

   
   True
   
   False
   

2 points

QUESTION 24

1. Chlorofluorocarbons replaced Freon as a coolant in air
   conditioners and refrigerators.

   
   True
   
   False
   

2 points

QUESTION 25

1. The United States did not sign the international Kyoto accord.

   
   True
   
   False
   

2 points

QUESTION 26

1. Sugar molecules are the building blocks of cell membranes.

   
   True
   
   False
   

2 points

QUESTION 27

1. The cell membrane is made from amino acids.

   
   True
   
   False
   

2 points

QUESTION 28

1. Cytoplasm is the fluid that takes up spaces between the organelles
   of a cell.

   
   True
   
   False
   

2 points

QUESTION 29

1. The primary difference between a prokaryote cell and a eukaryote
   cell is the nuclear membrane in the latter.

   
   True
   
   False
   

2 points

QUESTION 30

1. The “unit of inheritance” is the cell.

   
   True
   
   False
   

2 points

QUESTION 31

1. Three types of RNA are used in protein assembly.

   
   True
   
   False
   

2 points

QUESTION 32

1. Genetic engineering is based in part on the study of how viruses
   manipulate the cell replication processes.

   
   True
   
   False
   

2 points

QUESTION 33

1. Totipotent cells are valuable to research because of their ability to become any tissue.

   
   True
   
   False
   

2 points

QUESTION 34

1. The first animal cloned was a fruit fly.

   
   True
   
   False
   

2 points

QUESTION 35

1. Farmers understood natural selection concepts before Charles
   Darwin ever sailed to the Galapagos Islands.

   
   True
   
   False
   

2 points

QUESTION 36

1. Darwin’s Origin of the Species is important because it presents a
   single theory that unifies all of biology.

   
   True
   
   False
   

2 points

QUESTION 37

1. Virtually all contemporary scientists accept evolution true.

   
   True
   
   False
   

2 points

QUESTION 38

1. Natural selection would be impossible without genetic diversity.

   
   True
   
   False
   

2 points

QUESTION 39

1. Computer designed drugs will greatly decrease the time and
   increase the efficiency of drug research and development.

   
   True
   
   False
   

2 points

QUESTION 40

1. Viruses depend upon the host cell mechanisms to reproduce.

   
   True
   
   False
   

2 points

QUESTION 41

1. Any change in the DNA is called a/an

2 points

QUESTION 42

1. An organism that always produces offspring having the same form of a certain trait is said to be

2 points

QUESTION 43

1. The disease known as AIDS is caused by the virus.

2 points

QUESTION 44

1. Any structure that helps an animal survive and pass on its genes is called a/an

2 points

QUESTION 45

1. is the term used to describe the division of one cell into two.

2 points

QUESTION 46

1. Humans have pairs of chromosomes.

2 points

QUESTION 47

1. A/an is a molecule that facilitates bonding between two other molecules.

2 points

QUESTION 48

1. The branch of science that gives names to organisms is

2 points

QUESTION 49

1. The kingdom that contains multicellular organisms that get their energy and nutrients by eating other organisms is

2 points

QUESTION 50

1. A/an includes the plants, animals and microorganisms that live in a given area together with their physical surroundings.

2 points

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