Biology B
Credit By Exam Review Sheet
This Credit by Exam Review Sheet can help you prepare for the exam by giving you an idea of
what you need to study, review, and learn. To succeed, you should be thoroughly familiar with
the subject matter before you attempt to take the exam.
Every question that appears on the Credit by Exam/Examination for Acceleration is grounded in
the knowledge and skills statements and student expectations within the state-mandated
standards, the Texas Essential Knowledge and Skills (TEKS). It should be noted that an exam
will not test every student expectation. However, it is important that students study and know
the entire scope of the TEKS so that they can develop a complete understanding of the content.
The CBE/EAs are a global exam grounded in the TEKS and are not designed to be a final exam
for the University of Texas high school courses. You can view the TEKS for this exam online at
http://www.tea.state.tx.us/teks/. Since questions are not taken from any one source, you can
prepare by reviewing any of the state-adopted textbooks.
About the exam
The Credit by Exam consists of 70 multiple-choice that are worth 1 point each. You will be
allowed 3 hours to take the exam.
Concepts and Objectives
The bulleted list and sample questions below may not refer to all the material that will be in the
exam. This list only provides additional information for some of the student expectations tested
in the Biology Second Semester Credit by Exam. Ultimately, you should use the TEKS to guide
your exam preparation.
In the second semester, students learn about how organisms inherit traits, reproduce, evolve, and
how body systems function and maintain homeostasis. The second semester focuses on
• Plant and animal reproduction.
• Effect of hormones on plants and animals
• Inheritance of traits and the causes of genetic disorders.
• Natural selection in the evolutionary process.
• Organ systems in the human body. How they function and maintain homeostasis.
• How viruses work and their effect on organisms
• Bacteria and their role in the biological world.
In addition, students should also be able to do the following:
• Understand the process of meiosis and compare it to mitosis.
• Describe how plants reproduce.
• Identify and compare the characteristics of plants – non-vascular and vascular.
• Describe how humans reproduce.
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BIO B
CBE/EA
Review Sheet
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Understand how hormones influence human reproduction including birth control and
fertility.
Discuss the effects of hormones on plants.
Discuss fetal development from zygote to fetus.
Describe karyotyping and its use.
Discuss amniocentesis and its use.
Use punnett squares to predict genotypes and phenotypes.
Discuss codominant and sex-linked crosses.
Identify genetic disorders related to chromosomal or gene mutations.
Describe mutations at the chromosomal level.
Discuss how adaptation and change is part of the evolutionary process.
Discuss the role of natural selection in evolution.
Describe how competition and environment influence natural selection.
Describe adaptive radiation, convergent evolution, and co-evolution.
Describe the evolution of plants from an aquatic environment to land.
Describe the parts of a virus.
Discuss how a virus functions and the impact on humans
Describe the parts of a bacteria and the impact on humans.
Discuss human body systems: nervous, circulatory, reproductive, skeletal, digestive, and
urinary systems.
Sample Questions
These sample questions will give you a better idea of the types of questions you can expect on
the Credit by Exam. These questions are provided to illustrate the format of the exam; they are
not a duplicate of the actual exam. In order to be successful on the exam, you must study and
review all of the concepts listed above.
Multiple-Choice
1. In a cross between a homozygous male with TT alleles for tallness and a heterozygous
female with Tt alleles, what percentage of the offspring will be tall?
A
B
C
D
0%
50%
75%
100 %
2. In human females, the embryo develops in _____.
A
B
C
D
the oviducts
the uterus
the vagina
the placenta
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3. If the chromosomal number of an organism is 36, what is the chromosomal number of the
gamete?
A
B
C
D
9
12
18
24
4. The stigma, style, and ovary make up the female reproductive structure called the _____.
A
B
C
D
carpel
stamen
anther
filament
5. Cells go through how many phases of meiosis?
A
B
C
D
1
2
3
4
6. Males are more likely to inherit a sex-linked traits because _____.
A
B
C
D
they only have to inherit one X chromosome with the trait to have the disease
they have to inherit the trait from both parents
they can only inherit the trait from the father
they can only inherit the trait from the mother
7. The largest organ of the human body is the _____.
A
B
C
D
large intestine
stomach
liver
skin
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BIO B
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Review Sheet
8. The finches on the Galapagos Islands vary from island to island in the chain because they
occupy different niches. This variation is attributed to an evolutionary process called
_____.
A
B
C
D
convergent evolution
co-evolution
adaptive radiation
emergent evolution
9. Which of the following is not a part of non-specific immunity?
A
B
C
D
Skin
Mucous
Phagocytes
Antibodies.
10. Which of the following would be the most obvious reason for plants to move onto land
millions of years ago?
A
B
C
D
The ability to produce flowers
The abundance of unfiltered sunlight.
The ability to reproduce without water.
The lack of predatory organisms to feed on the plants.
Answer Key
Item Number
1
2
3
4
5
6
7
8
9
10
Correct Answer
D
B
C
A
B
A
D
C
D
B
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