What type of reaction is shown below?
Zn + CuCl2 → ZnCl2 + Cu
A Single-displacement reaction.
B Decomposition reaction.
C Double-displacement reaction.
D Synthesis reaction

During embryo development which of the following germ layers differentiates to form the
muscles?
A Introderm.
B Ectoderm.
C Endoderm.
D Mesoderm

Which of the following is NOT a homogeneous mixture?
A Salt dissolved in water.
B Sandy water.
C Air.
D Brass.

Which of the following is the final vessel through which semen must pass before being expelled from the
body?
A Ejaculatory duct.
B Vas deferens.
C Penile urethra.
D Membranous urethra.

Question 5:
At the end of mitosis in a human body cell, how many cells are produced and what is the number of
chromosomes in each cell?
A 4 cells with 46 chromosomes.
B 2 cells with 46 chromosomes.
C 4 cells with 23 chromosomes.
D 2 cells with 23 chromosomes

Where are immune cells produced?
A Lymph nodes.
B Thymus.
C Liver.
D Bone marrow

Which of the following is NOT a type of white blood cell?
A Antibody.
B Phagocyte.
C Helper T-cell.
D Plasma cell.

Which of the following is NOT a function of pancreatic juice?
A Increase acidity of stomach contents.
B Chemically digest proteins.
C Neutralize the pH of chyme.
D Chemically digest carbohydrates.

Which of the following prefixes would likely be the most appropriate for measuring the weight of a 2,500
g kitten?
A Nano.
B Kilo.
C Giga.
D Pico.

Which of the following is NOT true about reproductive hormones?
A LH (luteinizing hormone) stimulates ovulation and production of testosterone.
B FSH (follicle-stimulating hormone) stimulates maturation of sperm and ovum.
C LH (luteinizing hormone) is produced by the posterior pituitary gland.
D FSH (follicle-stimulating hormone) is produced by the anterior pituitary glan

Vibrio cholerae is a bacteria that causes the disease cholera. Disease-causing agents such as V. cholerae is
referred to as a(n) ________.
A Commensal microorganism.
B Pathogen.
C Vaccine.
D Interferon.

Which of the following is a decomposition reaction?
A CH4 + 2O2 → CO2 +2H2O
B Zn + 2HCl → ZnCl2 + H2
C H2CO3 → H2O + CO2
D 2Na + Cl2 → 2NaC

Due to water’s polarity, water is known as which of the following?
A Universal solvent.
B A base.
C Universal solute.
D An acid.

Which of the following groups of bones are part of the axial skeleton?
A Arms and hands.
B Pectoral girdle.
C Rib cage.
D Pelvic girdle.

A chemistry student is conducting an experiment in which she tests the relationship between reactant
concentration and heat produced by a reaction. In her experiment, she alters the reactant concentration and
measures heat produced. Which of the following is the independent variable in this experiment?
A Reactant concentration.
B Product concentration.
C Amount of heat produced by the reaction.
D Reaction rate

16:
Which of the following types of epithelial tissue secretes hormones?
A Muscle Tissue.
B Glandular Epithelium.
C Covering and Lining Epithelium.
D Connective Tissue.

In which of the following situations is a reasonable experiment unable to be designed?
A If a hypothesis cannot be formulated.
B If the data collected will only be qualitative in nature.
C If an outcome cannot be measured in any form.
D If the data collected will only be quantitative in nature.

Which of the following is NOT a function of the pituitary gland?
A Produce hormones and send to target cells via the bloodstream.
B Receive and interpret internal and external stimuli from sensory nerves.
C Store hormones from the hypothalamus and release as needed.
D Release trophic hormones to trigger other glands to produce hormones.Which of the following is NOT a function of the pituitary gland?

For an experiment to measure the volume of that can be exhaled by individuals of varying ages,
which of the following would be the MOST appropriate unit of measurement?
A Atm.
B Amu.
C Liters.
D Grams.

Damage to the parathyroid would most likely affect which of the following?
A Bone density.
B Stress levels.
C Secondary sex characteristics.
D Circadian rhythms.

Which of the following correctly describes the difference between compact bone and spongy bone?
A Spongy bone is lighter than compact bone.
B Compact bone is located more interior than spongy bone.
C Spongy bone has more osteons than compact bone.
D Compact bone has trabeculae that support the bone marrow.

Oxygen is exchanged between blood and tissues at which of the following areas?
A Arteries.
B Veins.
C Capillaries.
D Ventricles.

Which of the following contains a single immature egg cell that is released during ovulation?
A Ovaries.
B Follicles.
C Oocytes.
D Fallopian tubes

In the chemical equation below, what are the products?
4NH3 + 5O2 -> 4NO + 6H20
A NO, H20
B NH3, O2
C NH3, O2, NO, H20
D NH3, NO

Which of the following is the first step of the scientific method?
A Construct a hypothesis.
B Analyze data.
C Form a question.
D Make observations.

A scientist is interested determining whether folic acid supplementation affects the development of heart
disease, measured by changes in blood pressure. Study participants are divided into two groups.
Individuals in one group take a folic acid supplement each day, and those in the other group are given a
placebo. Participants are instructed to eat and exercise as normal. The scientist measures blood pressure at
the start of the study and six months later. She finds that participants who took folic acid supplements
lowered their blood pressure by 10 units more on average than those on the placebo. In the above study,
exercise represents which of the following variables?
A Controlled variable.
B Dependent variable.
C Control group.
D Independent variable.