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SM 2 Final Review
SM 2 Final Review
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SM 2 Final Study Guide
Flashcards
50 cards
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Practice quiz
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Host live
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Questions
50
Answers
1
Why are all X-linked alleles expressed in males, even if they are recessive?
Males have two X chromosomes
Males have two Y chromosomes
Males have just one X chromosome
none of the above
2
A bird's wings are homologous to a(n)
alligator's claws.
mosquito's wings.
dog's front legs.
fish's tail fin.
3
Density-dependent limiting factors include
blizzards.
damming of rivers.
disease.
earthquakes.
4
In genetic drift, the allele frequencies in a gene pool change because of
chance.
genetic equilibrium.
mutations.
natural selection.
5
One function of gel electrophoresis is to
cut DNA
make many copies of DNA
separate DNA fragments.
recombine DNA
6
Introduced species can threaten biodiversity because they can
cause biological magnification.
crowd out native species.
reduce the amount of fertile land.
cause desertification.
7
An example of a biotic factor is
competing species.
soil type.
average temperature.
sunlight.
8
The type of genetic drift that follows the colonization of a new habitat by a small group
directional selection.
the Hardy-Weinberg principle.
stabilizing selection.
the founder effect.
9
Biology dealing with interactions among organisms & between organisms and their environment
modeling.
economy.
recycling.
ecology
10
Ecosystem services include
solar energy.
all of the above
food production.
production of oxygen.
11
Which two factors increase population size?
deaths and emigration
deaths and immigration
births and immigration
births and emigration
12
What animals eat both producers and consumers?
omnivores
autotrophs
herbivores
chemotrophs
13
How many chromosomes are shown in a normal human karyotype?
44
2
23
46
14
The separation of populations by barriers such as rivers, mountains, or bodies of water is
temporal isolation.
behavioral isolation.
genetic equilibrium
geographic isolation.
15
Darwin noticed that many organisms seemed well suited to
providing humans with food.
surviving in the environments in which they lived.
swimming from South America to the Galápagos Islands.
being preserved as fossils.
16
A (An)__is a diagram that follows the inheritance of a single gene through several generations
genome
pedigree
karyotype
Punnett Square
17
When a dairy farmer chooses to breed the cows that give the most milk in the herd
acquired characteristics.
descent with modification
artificial selection.
natural selection.
18
Which of the following pairs of genotypes result in the same phenotype?
IBIB and IBi
IBIB and IAIB
IAIA and IAIB
IBi and ii
19
How do most primary producers make their own food?
by changing water into carbon dioxide
by using light energy to make carbohydrates
by breaking down remains to make carbon dioxide
by using chemical energy to make carbohydrates
20
Which of the following combinations of sex chromosomes represents a female?
XXXY
XXY
XX
XY
21
Which kingdom contains heterotrophs with cell walls of chitin?
Animalia
Fungi
Plantae
Protista
22
Population density refers to the
area inhabited by a population
carrying capacity
number of people in each age group
number of individuals per unit area.
23
A bird stalks, kills, & then eats an insect. Which pair of ecological terms describes the bird?
herbivore, decomposer
carnivore, consumer
autotroph, herbivore
producer, heterotroph
24
All the interconnected feeding relationships in an ecosystem make up a food
interaction.
web.
chain.
network.
25
A boy who is colorblind inherited the disorder from his
grandmother
mother
grandfather
father
26
Natural selection acts directly on
genes.
alleles.
mutations.
phenotypes.
27
In a fox population, the allele frequency of a gene for red fur changes from 20 % to 30 %
The population is evolving.
The population is not evolving
The population is decreasing.
The population is expanding.
28
Which of the following is the most abundant group of organisms on Earth?
Bacteria.
Protista
Eukarya
Archaea.
29
A word that means the same thing as
consumer
is
producer.
carbohydrate.
heterotroph
autotroph.
30
Which domain contains all organisms that have a nucleus?
Archaea
Portista
Eukarya
Bacteria
31
A trait that arose in an ancestor and is passed along to its descendants is referred to as a
derived character.
molecular clock.
physical similarity.
taxonomic group.
32
Each of the following is an abiotic factor in the environment EXCEPT
rainfall.
soil type.
temperature.
plant life.
33
According to the rules of binomial nomenclature, which of the terms is capitalized?
the genus name only
the species name only
neither the genus nor species names
both the genus and species names
34
On the Galápagos Islands, Charles Darwin observed
species completely unrelated to those in South America.
species similar to mainland South American species.
completely unrelated species on each of the islands.
species exactly like those found in South America.
35
In organisms that reproduce sexually, most variation that can be inherited is due to
gene recombination during sexual reproduction
mutations during gamete formation
the effects of radiation.
polygenic traits
36
Matter can recycle through the biosphere because
biological systems do not use up matter, they transform it.
biological systems use only carbon, oxygen, & nitrogen.
matter is assembled into chemical compounds.
matter does not change into new compounds.
37
The domain that contains unicellular organisms that live in extreme environments is
Archaea.
Eukarya.
Bacteria.
Eubacteria.
38
The genes carried by all members of a particular population make up the population’s
gene pool.
phenotype.
genotype.
allele frequency.
39
Preserved remains of ancient organisms are called
vestigial structures.
fossils.
homologous structures.
microspheres.
40
If a population grows larger than the carrying capacity of the environment, the
death rate must fall.
death rate may rise.
birthrate may rise.
birthrate must fall.
41
The principle of common descent helps explain why
birds & reptiles have a number of inherited characteristics.
tigers are so different from cheetahs
conditions in an organism’s environment ensure its survival.
well-adapted species have many offspring.
42
Plants are
primary producers.
primary consumers.
herbivores.
omnivores.
43
The total amount of living tissue within a given trophic level is called the
energy mass.
biomass.
organic mass.
trophic mass
44
Nitrogen fixation is carried out primarily by
bacteria.
consumers.
humans.
plants.
45
When farming, overgrazing,and/or seasonal drought change land to not support plant life
deforestation.
desertification.
depletion.
monoculture.
46
Which are two ways a population can decrease in size?
emigration and increased birthrate
emigration and decreased birthrate
increased death rate and immigration
immigration and emigration
47
If immigration and emigration numbers are equal- most important factor to a slowed growth rate?
constant death rate
increased birth rate
decreased birth rate
constant birth rate
48
Similar DNA sequences in genes can be evidence of
common ancestry.
mutations.
different anatomy.
binomial nomenclature
49
Changes in the sequence of DNA are called
gene shuffling.
allele frequencies.
genetic equilibrium
mutations
50
Organisms that can capture energy and produce food are known as
consumers
heterotrophs.
autotrophs.
omnivores.
