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Module 2 Keystone Review
Module 2 Keystone Review
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Module 2 Review
Flashcards
35 cards
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Questions
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Answers
1
Which of the following is an example of an observation?
A spider spins a web to catch its food.
Why does a spider spin a web?
A fly is caught in a spider web
What time of day is best for finding a spider web?
2
What happens to the unused organic matter at each trophic level within an energy pyramid?
It is used by consumers to make more food
It is absorbed by consumers
It is lost as ATP to the environment
It is recycled by decomposers
3
Which effect is most likely caused by nondisjunction during meiosis?
an increase in nuclei
an extra chromosome
only two types of nitrogenous bases
increased survival benefits from traits
4
Owl’s disk-shaped face helps direct sound waves into the owl’s ears, similar to a human ear
Homologous
Vestanologous
Analogous
Vestigial
5
Squirrels, separated by the Colorado River, became unique species.Which mechanism caused this?
geographic isolation
increased gene flow
behavioral isolation
habitat preference
6
What must be transmitted to new DNA strands during replication to maintain genetic information?
the sequence of phosphates from existing DNA strands
the sequence of bases from existing DNA strands
individual atoms from existing DNA strands
individual sugars from existing DNA strands
7
Fertilization of anegg leads to a diploid genome. Which is true of a diploid cell?
There are two genes per chromosome
There are two chromosomes per allele
There are 2 alleles per gene
There are two genes per allele
8
Which trait is an acquired trait?
brown eyes
bruise
dimples
red hair
9
A cell goes through Meiosis. How are the daughter cells different than the parent cell?
the daughter cells contain half the amount of DNA
the daughter cells are larger
the daughter cells grow twice as fast
daughter cells are diploid
10
Various bacteria, fungi, protozoans, vertebrates, and invertebrates all live in one common area
community
biome
population
ecosystem
11
Which answer correctly distinguishes between the following statements?
1: Fact 2: Theory 3: Hypothesis 4: Observation
1: Inference 2: Observation 3: Theory 4: Fact
1:Theory 2: Hypothesis 3: Observation 4: Inference
1: Observation 2: Inference 3: Fact 4: Hypothesis
12
Which relationship best describes the interaction between ticks and the deer?
Commensalism
Competition
Mutualism
Parasitism
13
Very few plants grow at the bottom of oceans. Which scenario best explains this observation?
decreased sunlight
increased competition
decreased oxygen
increased predation
14
A species of flower has 5 petals. One individual has 3 petals. What event most likely caused it
lowwater levels in the soil surrounding the parent plants
DNAis inherited from two different parent plants
hightemperatures during the flower production season
mutationin the gene code for petal number in the parents DNA
15
Which description is the best example of a population?
all of the red foxes in a forest
all of the red foxes in every forest
all of the organisms in a forest
all of the organisms in every forest
16
Which energy transfer most likely occurs between organisms in the food web?
from sparrow to grass
from rabbit to fox
from owl to fox
from mouse to grasshopper
17
Leopards live and hunt alone. What is most likely the primary value of living alone?
decreased space needs for the species
increased survival rates with habitat loss
reduced competition for natural resources
greater genetic variability within the species
18
How can translocation affect chromosomes?
results in chromosomes having very different lengths.
can cause duplication of certain sections of chromosomes
can result in failure of chromosomes to separate
can cause the exchange of genes between homologs
19
What type of evidence does the presence of homologous structures in plants provide?
Only some plants are capable of photosynthesis
Insects and plants evolved around the same time
plants have evolved from a common ancestor
Some animals are more closely related to plants
20
Which mutation is the most likely to result in no effect to the phenotype of a cell?
Frame-Shift
Silent
Nonsense
Missense
21
Two species of frog live in the same area. Which is the best evidence for a common ancestor?
the species' similar habitats
the species' physical characteristics
the species' mating behaviors
the species' similar diets
22
Which term best describes the basic unit of inheritance passed from a parent to offspring?
genotypes
phenotypes
genes
traits
23
Which statement best describes how invasive plants can negatively affectsnative herbivores?
can increase the flow of energy through the ecosystem.
can stop the life cycles of native herbivores.
can reduce the size of the native plant populations.
can attract other nonnative plants to the forest ecosystem.
24
Which location would most likelyhave an aye-aye population with the greatest genetic variation?
location 2
location 3
location 1
location 4
25
The graph represents changes to a trait. What most likely occurred at time 1?
Natural selection caused a new trait to be beneficial
A mutation produced a new allele for the gene
An invasive species with a new allele entered the population
There was an increase in the population of mice
26
Changing a single base causes an error that affects the next 500 amino acids in a protein.
substitution
silent mutation
frame-shift mutation
nonsense mutation
27
The amount of rainfall, intensity of UV radiation, and local climate are all examples of
Biotic factors
Abiotic factors
Vertebrates
Microbes
28
Which of the following is theoriginal source of energy in any ecosystem?
soil
sunlight
sugar
plants
29
Genetic engineers designed corn with antifungal properties. How does this benefit farmers?
It increases the value of each acre of land cultivated.
It makes each plant more resistant to disease.
It eliminates the processing needed to harvest corn
It lowers the cost of each acre of plants cultivated.
30
Which list of events occurs during the interphase stage of the cell cycle?
a new membrane begins to form around the chromatids
separation of sister chromatids
DNA replicates and proteins are produced
the cytoplasm divides, creating two daughter cells
31
Which outcome is mostlikely a result of selectivebreeding?
the formation of new genes
the expression of favored genotypes
development of new ecosystems
an increase in natural selection
32
A human is composed of trillions of cells. Which process directly causes this large number?
respiration
circulation
cell mutation
cell division
33
pitcher plants and venus fly trap have spines that catch insects. Cacti have spines for leaves
Vagus
Vestigial
Analogous
Homologous
34
The DNA of two brown eyed and blue eyed people is analyzed. What would they have in common?
the allele
the location of the gene
the DNA sequence
the amount of pigment
35
Whichof the following best describes an acquired trait of a cat?
Eye color because it is passed on from the prior generation
fur length because it is passed on from the prior generation
chipped tooth because it develops during the organism's life
long tail because develops during the life of the organism
