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The strength of a base is determined by its ability to
Which is a product of a neutralization reaction?
Which of the following determines the strength of an acidic solution?
Which of the following is a weak base?
A Lewis acid is a substance that
Which of the following is a characteristic of citrus substances?
Water can act as an acid or a base. Because of this behavior, it is known to be
A researcher identifies an unknown solution to have a pH of 3. What characteristic does the researcher most likely write down about this solution?
How do researchers determine the strength of a base?
NaOH is a Lewis base because it
Which is a characteristic of water?
Which sequence describes the hierarchy level of biological organization?
Which class of biomolecules help transmit genetic information?
In the taxonomic system, a class is grouped into which level?
How many molecules of ATP are produced after glycolysis?
Which metabolic pathway generates the most ATP?
Which is an example of a biological study?
What is a benefit of a taxonomic system?
What is a control variable?
In a study, a researcher describes what happens to a plant following exposure to a dry and hot environment. What step of the scientific method does this most likely describe?
Which is part of the monomer structure of a nucleic acid?
Which process is anabolic?
Why are metabolic pathways cyclic?
Which would benefit from the use of a taxonomic system?
Where does the citric acid cycle occur in a cell?
Why is glycolysis a catabolic pathway?
What is a theory?
Which taxonomic level includes the least variety of living things?
A researcher characterizes a polymer that consists of glycerol molecules. What does she write in her notes about this polymer?
Why is hydrogen bonding with water important?
A researcher characterizes the amino acid chain and structure of a novel substance. What type of substance is the researcher studying?
What happens during anabolic metabolism?
A researcher classifies a newly discovered organism in the class taxonomy level. What other taxonomic level is this new organism classified in?
A researcher predicts that a new drug will lower cholesterol in people. What is this statement called?
A study was performed to evaluate which type of road salt deiced a road most quickly. What is the independent variable?
During protein synthesis in a cell, the primary structure of the protein consists of a linear chain of monomers. What is another way to describe this structure?
Which of the following helps differentiate a non-living thing from a living thing?
What standard is used to make comparisons in experiments?
_____ bonds are used to join water molecules together.
Which of the following is produced during the Citric Acid Cycle?
What is the name for the four planets in our solar system that are closest to the sun?
What are main sequence stars?
What is a galaxy?
What are giant stars?
What is the name for the regions in space where gravity is so intense that nothing can escape?
What is dark matter?
What is a light-year?
Which of the following is part of an engine?
The main function of an engine is to:
Which of the following is not a type of transmission?
Select the best summary of a crankshaft.
A dog runs out into the middle of a road and a driver swerves tightly around a corner to avoid hitting it. The car is able to maneuver the road because of:
A man decides to drive his manual truck through a city and notices that a red light is stalling for excessive traffic and pedestrians. The clutch in his car helps:
The pistons in a four-stroke cycle engine:
Which wave is associated with a ventricle systole?
Which blood group is a universal acceptor?
The mitral valve regulates blood that flows into the
Which valve regulates blood flow between the right atrium and right ventricle?
A patient presents with excessive bruising, excessive bleeding, and slow wound healing. What does the patient’s blood test reveal?
Which is the correct order of formed elements in blood from smallest to largest cell size?
What is the purpose of an electrocardiogram?
What percentage of erythrocytes is the blood composed of?
Platelets are important because they
Which heart layer is composed primarily of cardiac muscle?
What happens after the blood leaves the pulmonary vein?
Exchanges of substances like gases and nutrients occurs at the
Which substance is plasma mostly composed of?
An individual with leukemia presents with abnormally low leukocyte levels. Which is strongly correlated with this low blood cell count?
What substances transported in blood does the liver excrete as bile?
What happens after platelets aggregate at a damaged blood vessel site?
Which happens as a result of a diastole?
What segment of the electrocardiogram is associated with atrial systole?
What is the purpose of the superior vena cava?
After blood leaves the aorta, it travels to the
Which blood group does NOT display A and B antibodies in the plasma?
A laboratory technician needs to determine the leukocyte count in a patient. From which part of a blood sample are these cells extracted?
Which formed element is found in the buffy coat?
What happens after blood coagulation?
What is the densest component of blood?
Which blood group indicates the absence of an Rh factor?
Agglutination begins in a tube containing A-antibodies. What does this indicate about the blood sample?
Which blood group is a universal donor?
Why is vascular spasm important?
What blood type can a person with type AB blood donate to?
Blood oxygen levels are most likely low when blood _____.
A laboratory technician identifies a person’s blood as O+. What does this mean?
People with type O blood can accept blood from people with _____ blood.
Erythrocytes function to
Which statement confirms that the cell membrane is selectively permeable?
What is the most basic unit of structure in living things?
A researcher discovers a cell that is less than 0.5 millimeters in diameter. This cell has pili surrounding its cell wall. What does the researcher classify this cell as?
Why did it take many years for the cell theory to be developed?
Which statement is most strongly supported by the cell theory?
Which cell component is characterized as a jelly-like substance?
Which structure do cells rely on for movement?
Which is a characteristic of prokaryotes?
What organelle plays a role in assembling subunits for protein synthesis?
A cell processes the conversion of carbohydrates to ATP to help perform various biological functions. Where does this conversion occur in the cell?
Which discovery is Robert Hooke credited with?
Where does enzyme synthesis occur in a cell?
A protein is synthesized in the ribosome. Where does it travel next?
Which organelle is associated with an animal cell?
What cellular process do autotrophs rely on to obtain energy?
What organelle is only associated with plant cells?
Which organism would most likely be labeled as a consumer?
How is a plant cell different from an animal cell?
Chromosomes contain all of the information necessary to run a cell and pass on a cell’s hereditary traits to new cells. Where are these structures found in a cell?
Which cell part stores material in the cell?
What is the function of a lysosome?
Which two organelles work together to facilitate protein synthesis?
Which of the following is supported by the cell theory?
A scientist discovers a cell that has a nucleus and is 15mm in size. What type of cell is this classified as?
Which of the following is most likely absent in prokaryotic cells?
In a cell, the mitochondrion is to supplying energy as a Golgi Apparatus is to _____.
What raw inorganic material would an autotroph most likely use to create chemical energy for growth?
A chemist decides to study reactions occurring in a cell’s cytoplasm. Which of the following reactions does she observe?
If a biochemist isolates a large amount of pyruvate, which part of the cell is he working with?
Which of the following characteristics is unique to all prokaryotes?
Chromosomes line up during
What organism makes a cell plate during cytokinesis?
Mitosis is different from meiosis because mitosis
Which process is part of photosynthesis?
Which gives the correct order of cellular respiration?
How many net ATP molecules are generated by the process of glycolysis?
How many rounds of cell division occur during meiosis?
A scientist is watching a colony of bacteria on a plate, and the colony is growing. Which process is most likely responsible for this growth?
What must occur as a transition reaction before the citric acid cycle begins?
Sister chromatids are formed after chromosomes
What metabolic process helps a cell yield a large amount of ATP?
During which phase of meiosis do chiasmata structures form?
Before mitosis occurs
Which statement correctly compares cytokinesis in plants and animals?
Someone experiences a cut on the finger. Cell division is used during this situation for the purposes of
Binary fission is a method
If someone needs ATP desperately and has run out of oxygen, what could help?
A child falls down and punctures his skin. What biological process must occur to repair the damaged skin?
Sister chromatids and centromeres are found in a ____ chromosome?
What will strontium do to form a stable ion with a +2 charge?
Which of the following statements is true regarding the number of valence electrons in different elements?
Which of the following elements will gain three electrons to become stable?
Which element in period 4 of the periodic table will not react to form a compound?
How do zinc and sulfur react to form a compound?
Which of the following bonds involves elements with the greatest difference in electronegativity?
How do silicon and oxygen form a chemical bond?
What type of bond forms between calcium and iodine, and why?
Which of the following describes one way that a chlorine atom can become stable?
What type of bond forms between nitrogen and oxygen, and why?
Which of the following type of bond forms between two atoms that have similar electronegativities?
Which of the following elements will form an ion with a charge of +2 to be stable?
Which of the following bonds is the most polar?
Which of the following elements will form a polar covalent bond with phosphorus?
An atom of which of the following elements has the strongest pull on shared electrons in a covalent bond?
A spoonful of sugar is added to a hot cup of tea. All the sugar dissolves. How can the resulting solution be described?
Sugar is dissolved in water. Which of the following statements best describes the components of this solution?
Which of the following is an example of a homogeneous mixture?
A beaker contains 50 mL of oil and 50 mL of water. No matter how much the mixture is stirred, the oil and the water still separate into two layers. Which statement accurately describes this mixture?
Why must researchers consider the placebo effect?
As a variable increases, another variable increases. This describes a(n)
An electric balance measures an object’s
What is a treatment group?
A control group
What is the purpose of a placebo?
Which term is used interchangeably with negative variation?
Several participants are enrolled in a study that is evaluating the effectiveness of new drug targeted at slowing the progression of breast cancer. Some participants are asked to take the new drug and monitored over a six-month period. Others are asked to take a placebo. They are also monitored over six months. What is the dependent variable?
Why is the metric system used in science?
A student notices a pattern of stripes on five tigers. Each of the five tigers has the same stripe pattern. Using his inductive reasoning, what does he logically assume based on this information?
Three different dispersants that are used to break up oil in water are evaluated for their effectiveness. Dispersant A has a concentration of 10m, dispersant B has a concentration of 7m, and dispersant C has a concentration of 3m. Each dispersant is separately poured into a solution of water and oil. The amount of time it takes each dispersant to disperse the oil is recorded. Which of the following statements describes the positive correlation observed in this study?
What is used to measure the volume of a liquid?
Which is an example of deductive reasoning?
What base measurement unit is associated with reported values measured by a graduated cylinder?
A researcher wants to evaluate how different tire treads affect braking speed. How should she define her control group?
What is another term used to describe a direct correlation?
Which part of the scientific method requires a researcher to create variables?
What metric base unit is used to record mass?
If a researcher notices a negative slope while analyzing his data, what can he conclude?
A researcher notices a positive correlation between the height of a plant and nutrient concentration over time. Based on this observation, what conclusion does he reach?
A fish in a large fish tank is fed 5 ounces of food once a day. The same type of fish in a second tank is fed 10 ounces of food each day. The same type of fish in a third tank is fed 2 ounces of food four times a day. This study lasts for a four-week period where fish weight is measured weekly. What is the dependent variable?
Empirical evidence is
A researcher wants to determine the impact of sunlight on plant growth. Which measuring tool should she use?
Five tropical plants are kept at varying humidity levels in a greenhouse for three months. One plant is left outside in normal conditions. Plant height is measured weekly. What is the control of the experiment?
Deductive reasoning is a logical process based on
Which of the following best describes an electric current?
A scientist is using a compass to detect magnetic fields. Which experiment will deflect the compass needle?
Which of the following events produces a magnetic field?
Which of the following is an example of electromagnetic induction?
Region X and region Y are approximately the same size, but the magnetic flux through region X is much higher. Which statement about these regions is correct?
Which situation is impossible?
In a certain circuit, three wires connect at a node. If one of those wires carries 3 amps into the node and another carries 1 amp out of the node, what current does the third wire carry?
A voltage source does which of the following?
A positively charged object is inside a sphere that has no effect on electric fields. In what direction will the electric flux be?
A physicist is accelerating ions in a vacuum chamber to examine their behavior. Considering only effects produced by the ions, which of the following will be absent?
A 200-volt source is connected to a single 1,000-ohm resistor. What is the voltage drop across the resistor?
The electric force on a 1-coulomb charge is 25 newtons. If that charge is removed, what is the field strength at its former location?
A proton has an electron on either side of it such that all three particles lie on a line and each electron is 1 millimeter from the proton. What is the direction of the net electric force on the proton?
If an engineer converts magnetic fields into an electric potential difference, what is he employing?
A child playing with bar magnets is holding two of them close together such that the south pole of one is facing the north pole of the other. What will happen when the child releases the magnets?
Which of the following represents an electric current?
The magnetic flux near the end of a magnet is much greater than the magnetic flux farther away from the end. If the magnet moves away from a wire loop, what will happen?
The electric field at a certain location is 100 newtons per coulomb. What would be the electric force exerted on an electrically neutral object placed at that location?
A circuit contains a battery and a 2-ohm resistor. If 0.001 amps of current flow from the battery’s positive terminal, how much current flows back into its negative terminal?
What is a primary difference between intracellular chemical signals and intercellular chemical signals?
Neurohormones are hormones secreted from cells of the _____ system.
The negative-feedback mechanism that regulates the level of glucose in a person’s blood is an example of what type of hormone secretion regulation?
The shape and chemical characteristics of each receptor site allow only certain chemical signals to bind to it. This is called _____.
Which of the following hormones usually remains unchanged as a person ages?
Which two hormones promote sperm cell production in males?
Some intercellular chemical signals diffuse across cell membranes and bind to intracellular receptors. What are the two factors that enable this to occur?
What is the human body’s response to growth hormones?
Hormones from the pituitary gland act on the ovaries and the testes, causing those organs to secrete sex hormones. Which of the following is a function of sex hormones?
Which of the following hormones would cause skin color to become darker?
The thyroid-stimulating hormone’s response is an increased metabolic rate. What would be a side effect of an underactive secretion rate?
Which of the following is an effect of aging on hormone secretion?
In the negative feedback loop that regulates the levels of blood sugar, insulin is secreted to enable the human body to use the end products of digestion. What does the pancreas secrete when the blood sugar levels are too low?
Why is it important that hormone secretion is regulated?
How does the human body ensure that a hormone does not influence other cells by connecting to the wrong receptor?
For which of the following hormones would production likely increase during pregnancy?
What decreased hormone levels may play an important role in the loss of normal sleep-wake cycles (circadian rhythms) with aging?
Not all cells in the pancreas secrete insulin because of the hormone somatostatin, which inhibits the release of insulin by all cells. What type of intercellular chemical signal does this illustrate?
Which chemical signal would respond to the redness caused by an infected wound?
An intracellular chemical signal can be produced in the cell membrane. Once it is produced, where does it go?
An area on a person’s arm becomes inflamed. What type of response does this indicate?
Which of the following is one of the primary functions of the endocrine system?
What is the target of the luteinizing hormone in females?
A group of girls realize that their menstrual cycles begin around the same time every month. What chemical signal causes this?
A friend is changing the tire on her car, and the jack breaks. Her hand is caught under the car. A passerby notices, runs over, and lifts the car off her hand. Which type of intercellular signal has responded?
Which of the following symptoms could be expected in a person with Addisons’s disease?
In stressful situations, acetylcholine is produced. Which intercellular chemical signal is responsible for this action?
What disease results when the pancreas cannot uptake the glucose in the bloodstream properly?
Which hormone’s response is the increased secretion of cortisol?
During the aging process, not all hormone levels decrease; some actually increase. Which of the following is a hormone that may increase as a person ages?
Hormones are distributed all over the body but only aim for _____ cells.
An extensive network of blood vessels supplies the endocrine glands. Why is this necessary?