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WorksheetsKeystone Biology Review
Total questions: 20
Worksheet time: 24mins
Name
Class
Date
1.
symbiotic relationship in which both organisms benefit
a)
competition
b)
Mutualism
c)
nitrogen fixation
d)
energy pyramid
2.
What is the major difference between a community and an ecosystem?
a)
A community involves only the biotic, not the abiotic
b)
An ecosystem only includes herbivores and carnivores-- no decomposers
c)
An ecosystem involves only the biotic, AND THE abiotic
d)
An ecosystem is just a larger community
3.
Which of the following is a biotic-biotic interaction?
a)
A snake warming itself on a sunny rock
b)
A rainstorm washing nutrients from the soil
c)
A human shivering because of cold weather
d)
a squirrel gathering acorns from an oak tree
4.
Two organisms that are closely related would have
a)
very similar DNA sequence
b)
exactly the same DNA sequences
c)
no proteins in common
d)
completely different DNA sequence
5.
When Hurricane Marilyn struck the Caribbean islands in 1995, a group of about 15 green iguanas floated on storm debris from the island of Guadeloupe to the island of Anguilla. No other iguanas lived on Anguilla. Because the iguanas are geographically isolated from others of their species, the iguanas will MOST LIKELY
a)
develop new traits.
b)
be unable to breed.
c)
be unable to survive.
d)
interbreed with other species.
6.
The drastic reduction in genetic variation that results when a new, isolated population is established by a very small number of individuals from a larger population is known as
a)
the found effect.
b)
speciation.
c)
natural selection.
d)
gene flow.
7.
ATTTGAGCC- Original
ATTGAGCC - Mutated
The example above is an example of a
ATTGAGCC - Mutated
The example above is an example of a
a)
Insertion- Frameshift
b)
Deletion- Substitution
c)
Deletion -Frameshift
d)
All of the above
8.
Dr. Smith's parents have normal hearing. However, Dr. Smith has inherited a form of deafness. Deafness is a recessive trait that is associated with the abnormal allele (d). The allele associated with normal hearing is (D). Dr. Smith's parents could have which of the following genotypes?
a)
DD and dd
b)
dd and dd
c)
Dd and Dd
d)
DD and DD
9.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
10.
Which of the following is an example of homozygous dominant?
a)
Jj
b)
Rr
c)
MM
d)
ee
11.
Name the growth phase of the cell cycle for both Mitosis and Meiosis.
a)
metaphase
b)
telophase
c)
interphase
d)
anaophase
12.
Identify the phase.
a)
Metaphase I
b)
Metaphase II
c)
Prophase I
d)
Anaphase II
13.
What is the role of the spindle during mitosis?
a)
it changes the chromatin to chromosome
b)
duplicate the DNA
c)
breaks down the membrane
d)
separates the chromatids.
14.
All of the offspring of an organism have the same genetic material, which is identical to the parent organism. From this, we can conclude that this organism -
a)
makes its own food
b)
is unicellular
c)
live in a marine habitat
d)
reproduces asexually
15.
The table shows the results of measuring the percentages of the four bases in the DNA of several different organisms. Some of the values are missing from the table. Based on Chargaff’s rule, the percentages of guanine bases in chicken DNA should be approximately what?
a)
28.8%
b)
19.9%
c)
21.5%
d)
13.4%
16.
The cell spends most of it's life in ________________.
a)
mitosis
b)
cytokinesis
c)
Interphase
d)
None of the above
17.
Before cells can divide, what must be copied?
a)
mitochondria
b)
cytoplasm
c)
DNA
d)
Cell Wall
18.
What amino acid is represented by the codon UUA?
a)
Phenylalanine
b)
Tyrosine
c)
Leucine
d)
Stop codon
19.
Which of the following best defines a gene?
a)
A diploid cell containing two sets of chromosomes
b)
A unit made up of chromosomes that control for a specific trait
c)
A segment of DNA that codes for a particular protein
d)
All the other answers are correct.
20.
What is the difference between DNA and RNA
a)
DNA has uracil and RNA has thymine
b)
DNA is involved in transcription and RNA is involved in translation
c)
DNA contains thymine and RNA contains uracil
d)
DNA is made of nucleotides and RNA is not
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