Why are intermolecular forces, such as van der Waals forces, important to biological function?

Easy to form and break, making them ideal for short-term interactions.

What is genetic diversity?

variety of inheritable characteristics or genes in interbreeding population

What is the definition of the cell theory? It states that:

1 or more cells, cells are basic units of life, cells come from other cells

The use of total global resources by humans is measured in ...

hectares of land used per person

Which is a weakness of food webs?

A food web does not represent all possible links in an ecosystem

Which is an adverse effect of a negative-growth population trend?

too few workers to support an aging population

To develop a product that warms people's hands, would you use an exothermic or endothermic reaction? Why?

Exothermic; that way the reaction will release heat

Which is a characteristic of exponential population growth?

Resources are consumed exponentially during all phases.

the process of maintaining balance in an organism's internal environment

If a scientist finds inconsistent or wrong data, what does he/she do?

Inconsistencies in the data warrant further investigation

Why must the number and type of atoms in the reactants equal the number and type of atoms in the products formed?

The law of conservation of mass says matter cannot be created or destroyed.

A biologist would ...

describe the behavior of brown bats

Which of the following can be classified as a van der Waals force?

a weak electrostatic interaction between two polar molecules

What is the definition of selective permeability?

Property of membrane that allows control of movement of substance in or out

What is the function of the smooth ER?

A variety of complex carbohydrates and lipids are synthesized.

Which explains why secondary succession generally occurs more rapidly in an area than does primary succession?

Soil formation has already occurred.

How do enzymes affect a chemical reaction, making it easier to occur?

They reduce the activation energy.

Which is an example of predation?

mallard eating aquatic invertebrates

Which is an example of a stimulus and the accompanying response of an organism?

A rat scurries past, and a python strikes at it

What is species diversity?

in a biological community, the number and abundance of different species

Which is an example of mutualism?

a fish protecting a shrimp, who builds a burrow for both

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KHS Biology Semester Review

49 termsStudBud Administration193 plays

Modules 1-7 Review

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Questions 49

Answers

1
Why are intermolecular forces, such as van der Waals forces, important to biological function?
Easy to form and break, making them ideal for short-term interactions.
Intermolecular foces do not play a major role in biological functions.
They are stronger than ionic or covalent bonds.
Easy to form and break apart, making them ideal for long-term interactions
2
Where is the greatest percentage of Earth's freshwater?
underground
glaciers
lakes
rivers
3
What is genetic diversity?
variety of inheritable characteristics or genes in interbreeding population
number of different species living in a specific area
number and abundance of different species
variety of ecosystems in the biosphere
4
Which organelle is large in plant cells but small or absent in animal cells?
chloroplast
vacuole
nucleolus
centriole
5
What is the definition of the cell theory? It states that:
Cell is the basic structural and functional unit of all living organisms.
1 or more cells, cells are basic units of life, cells come from other cells
Eukaryotic cells are larger than prokaryotic cells.
All cells have a plasma membrane and genetic material called DNA.
6
The use of total global resources by humans is measured in ...
barrels of oil per person
hectares of land used per person
industrial metals used per country
total food consumed per country
7
Which is an abiotic factor?
fungi and moss on a rotting log
a forest of deciduous tress
an ocean current of cold water
a polar bear on an ice floe
8
Which is a weakness of food webs?
A food web does not represent all possible links in an ecosystem
many food chains of a food web are too complicated
don't account for non-native species
Trophic levels are not taken into account
9
White hair on a polar bear is an example of ...
growth
adaptation
development
response
10
One male black bear per several hundred square kilometers is what type of dispersal?
uniform
random
triangle
clumped
11
Which is an adverse effect of a negative-growth population trend?
too few workers to support an aging population
inadequate financial resources to care for children
too few jobs to support a large, young population
an excess burden on global natural resources
12
Which is an autotroph?
sparrow
wolf
snake
algae
13
Which gas is a greenhouse gas?
H2
AgNO3
CO2
NaCl
14
To develop a product that warms people's hands, would you use an exothermic or endothermic reaction? Why?
Exothermic; that way the reaction will release heat
Exothermic; that way the reaction will absorb heat
Endothermic; that way the reaction will absorb heat
Endothermic; that way the reaction will release heat
15
Which is a characteristic of exponential population growth?
Resources are consumed exponentially during all phases.
Initial population growth is rapid.
The lag phase follows rapid growth.
Growth rate is inversely proportional to population size.
16
Which organisms capture atmospheric nitrogen for the process of nitrogen fixation?
fungi
bacteria
plants
animals
17
Which organisms are affected most by biological magnification?
mice
wolves
plants
algae
18
Which biome has an annual rainfall less than 10 cm/yr?
tundra
savanna
rain forest
desert
19
Which organelle is called the "powerhouse of the cell"?
mitochondria
ribosome
nucleus
vesicle
20
What is homeostasis?
Arrange phospholipids in a way that allows the plasma membrane in water
the process of maintaining balance in an organism's internal environment
A membrane which allows some substances to pass through
Ability to move needed substances or waste materials through the membrane
21
Why do ecologists use models?
helps them collect more samples
to control all the variables
less expensive than field work
lets them study many things at once
22
Which organism follows an r-strategy for reproduction?
human
zebra
robin
mayfly
23
If a scientist finds inconsistent or wrong data, what does he/she do?
The data are flawed and should be discarded or ignored
A new idea or theory should be devised
Inconsistencies in the data warrant further investigation
The data reflect the flaws in current, scientific ideas
24
Which helps maintain a dog's homeostasis?
hunting
eating
sleeping
panting
25
Which defines extinction?
An ecosystem vanishes.
Genetic diversity drops.
A species disappears.
Biodiversity decreases.
26
Why must the number and type of atoms in the reactants equal the number and type of atoms in the products formed?
Exothermic reaction must balance energy absorbed by an endothermic one.
Atoms are converted to other elements by chemical reactions.
The law of conservation of mass says matter cannot be created or destroyed.
Chemical processes covert between matter and energy.
27
Which might increase the human carrying capactiy during the twenty-first century?
changing reproductive patterns
widespread fatal diseases
family planning strategies
new technological advances
28
Which is a testable explanation?
independant variable
observation
dependant variable
hypothesis
29
A biologist would ...
describe the behavior of brown bats
identify the cause of an earthquake
design a new, solar-powered car
provide a first time home loan
30
Using organisms such as fungi to detoxify a polluted area is called ...
sustainable use
bioremediation
reclamation
biological control
31
Which ecosystem has the greatest diversity?
estuary
bog
marsh
swamp
32
Which would be a violation of the CITES treaty?
polluting lakes
hunting wild turkeys
clearing rain forests
selling tiger skins
33
What causes the edge effects in habitats?
biological magnification
fragmentation of habitat
destruction of habitat
eutrophication
34
Which of the following can be classified as a van der Waals force?
a strong electrostatic interaction between two atoms in an ionic bond
a weak electrostatic interaction between two polar molecules
a non-polar covalent bond
a polar covalent bond
35
What is the definition of selective permeability?
moves needed substances or waste materials through the plasma membrane
Property of membrane that allows control of movement of substance in or out
Process of maintaining balance in an organism's internal environment
Phoshpolipid molecules arranged with polar heads facing outside
36
What is the function of the smooth ER?
It surrounds the nucleus with a double membrane.
Carbohydrates, lipids, and other substances are consumed
A variety of complex carbohydrates and lipids are synthesized.
Proteins are synthesized and produced.
37
A human producing sweat is an example of what?
homeostasis
reproduction
genetic drift
organization
38
Which explains why secondary succession generally occurs more rapidly in an area than does primary succession?
Average precipitation is higher.
Pioneer species are microscopic.
Moderate climatic conditions exist.
Soil formation has already occurred.
39
Which is characteristic of a savanna?
thick forests
sand and rocky terrain
grasses with trees intermixed
frozen soil
40
Which organelle produces protein for a cell?
nucleus
endoplasmic reticulum
Golgi apparatus
ribosome
41
Which option below is a solution to global warming?
reforestation
more 18 wheelers
eating ham sandwiches
inventing a new soft drink
42
Which of the following is an atom that has lost an electron?
a positive ion
a non-polar molecule
a negative ion
a polar molecule
43
How do enzymes affect a chemical reaction, making it easier to occur?
They make the reaction endothermic.
They reduce the activation energy.
They make the reaction exothermic.
They raise the activation energy.
44
Which is an example of predation?
mallard eating aquatic invertebrates
two male rams fighting for females
tick lodging in the skin of a wolf
clownfish protecting its anemone
45
Which is an example of a stimulus and the accompanying response of an organism?
A rat scurries past, and a python strikes at it
A hawk grabs a branch to gain a perch
A cell displays organization
A wildebeast crosses a river during migration
46
What is the ratio of carbohydrates in a monosaccharide?
1 carbon: 3 hydrogen: 1 oxygen
1 carbon: 2 hydrogen: 1 oxygen
2 carbon: 1 hydrogen: 2 oxygen
1 carbon: 2 hydrogen: 2 oxygen
47
What is species diversity?
variety of ecosystems in the biosphere
any different environmental condition occuring along ecosystem's boundaries
in a biological community, the number and abundance of different species
variety of inheritable characterics or genes in an interbreeding population
48
Which is an example of mutualism?
a peacock courting a peahen
crayfish and minnows resting under a rock
two snake species with similar markings
a fish protecting a shrimp, who builds a burrow for both
49
Which is a density-independent factor for a flock of Canada geese on a large lake?
dwindling food supply
infectious virus
intestinal worms
unusually cold winter

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