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Category 3
Test Description: EOC based questions
Instructions: Answer all questions to get your test result.
1) Some organisms have genes that improve their ability to survive and reproduce. If the genes also help their offspring survive and reproduce, then which of the following will most likely increase?
A
the frequency of the genes in the population
B
the number of genes in one chromosome
C
the number of genes in the species
D
the frequency of the genes in one individual
2) The more closely related two different organisms are, the
A
less likely they are to have the same genes in common
B
less similar their DNA sequences are
C
more similar their habitats are
D
more recently they shared a common ancestor
3) Which of the following best explains how natural selection occurs?
A
individuals with adaptive traits are likely to survive and pass their traits on to their of their offspring
B
individuals acquire traits during their lives that they pass on to their offspring
C
when organisms reproduce, they pass along only their most useful traits to their offspring
D
only individuals with adaptive traits want to reproduce and pass their traits to their offspring
4) Which condition is essential for natural selection to result in a new species?
A
a static environment
B
a long life span
C
unlimited resources
D
an inherited variation
5) A large population of cockroaches was sprayed with an insecticide. A few of the cockroaches survived and produced a population of cockroaches that was resistant to this spray. What can best be inferred from this example?
A
insecticides cause mutations that are passed on to the next generation
B
the environment has no effect on the survival of an organism
C
a species will adapt no matter what the environment
D
individuals with favorable variations survive and reproduce
6) Having a standard taxonomic system benefits the scientific community by allowing scientists from all over the world to do which of the following?
A
Understand how other scientists classify predator-prey relationships
B
Use a similar system to classify the impact of removing species from ecosystems
C
Have a common understanding in the classification of organisms
D
Have a common system for the classification of locations containing fossils
7) Genetic variation can aid in the survival of species when the environment changes. Which of the following is the best example of an organism with a genetic variation that could improve survival chances over time?
A
an ant that is resistant to pesticide
B
a cactus that has no spines
C
a mouse that has learned to avoid mousetraps
D
a wasp that is infected with parasites
8) Five species of frogs that live in separate habitats with non-overlapping ranges along the Mississippi River share a common ancestor. Which process is most likely responsible for the formation of these five distinct species?
A
geographic isolation
B
physiological isolation
C
temporal isolation
D
behavioral isolation
9) The concept of gene flow is demonstrated when a cow is driven off from its herd, joins another herd, and reproduces. When the cow contributes to the gene pool of the new herd, which of these most likely increases?
A
Reproductive mutations
B
Environmental fitness
C
Genetic variation
D
Natural Selection
10) Genome maps provide the DNA sequences of chromosomes. Some scientists have compared the genome maps of a hedgehog and a sloth. What do these genome maps allow the scientists to determine?
A
how much the size ranges of the two species differs
B
the color patterns of the offspring of each species
C
the methods of protein synthesis that each species uses
D
how closely related the two species are to each other
11) Arthropods are joint-legged animals. Spiders, crabs, pill bugs, centipedes, and millipedes are examples of the many types of arthropods. Which of these arthropods are most closely related?
A
Arthropods of the same family
B
Arthropods of the same class
C
Arthropods of the same species
D
Arthropods of the same genus
12) The Linnaean taxonomic system classifies organisms into divisions called taxa. If two organisms belong to the same taxonomic group, they are related. Similarity at which of these levels indicates the closest relationship?
A
Order
B
Genus
C
Class
D
Kingdom
*select an answer for all questions
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