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Which of the following groups of bones are part of the axial skeleton?
Which of the following is the material that is secreted into hair follicles to waterproof and lubricate the skin?
What is the connective tissue that attaches bone to bone and helps strengthen joints?
Which of the following is NOT a nucleobase of DNA?
Which of the following does NOT distinguish quantitative data collection from qualitative data collection methods?
Atomic number is the number of
Which of the following is a descriptive, generalized body of scientific observations?
Which of the following types of cells are the main transporters of oxygen through the body?
Which of the following is the general term for a chemical substance that the body produces and transports through the blood to stimulate a cellular response?
A chemist finds a bottle of hydrochloric acid in his laboratory. Although the chemical is labeled properly, the concentration is not included. He decides to determine the concentration of the acid by performing an acid-base titration reaction. To perform this reaction, he adds a known volume and concentration of strong base to the acid while measuring the pH of the combined acid and base. Once a neutral pH is obtained, the reaction has proceeded to completion and the concentration of the acid may be calculated. In this reaction, what is the dependent variable?
The graph below shows how pH affects the rate of enzyme action for two digestive enzymes.
If the small intestine has a pH higher than 7, what happens to the activity of gastric protease when it enters the small intestine?
Which of the following occurs due to a hypersensitivity in the immune system that causes an inflammatory response to a common material?
Which of the following is the primary muscle that drives ventilation?
The graph shows the solubility of various salts at a range of temperatures.
At what temperature is the highest mass of NaCl soluble in 100 grams of water?
Which of the following molecules experience London dispersion forces?
Which of the following is NOT a hormone-producing gland of the endocrine system?
The exchange of gases and blood happens in which of the following parts of the respiratory system?
Which of the following glands provides nourishment for sperm, as well as the majority of the fluid that combines with sperm to form semen?
Which of the following is the largest branch of the abdominal aorta, which supplies oxygenated blood to the upper digestive tract?
When benzene burns completely in excess oxygen, which combustion products should form?
Which of the following is a heterogeneous mixture?
Which of the following is the element of blood that comprises most of its total volume?
Which of the following is NOT true for enzyme-catalyzed reactions?
Which of the following is the molecule found in red blood cells that binds to up to four oxygen molecules?
Which of the following statements best defines a scientific model?
Which of the following is the division of the nervous system primarily responsible for regulating all involuntary muscle functions?
Which of the following is an appendage of a neuron that sends electrical signals away from the neuron cell?
Which of the following describes how a catalyst speeds up a reaction?
Alleles for brown eyes (B) are dominant over alleles for blue eyes (b). If two parents are both heterozygous for this gene, what is the percent chance that their offspring will have brown eyes?
Digestion begins in which of the following organs?
Which type of hypothesis assumes no relationship between two variables?
Which of the following is a mutation that occurs in the DNA of a nonreproductive cell?
Which of the following is the structure of the male reproductive system that stores spermatozoa during the maturation process?
Which of the following instruments is used to find a person’s blood pressure?
What is the complementary DNA strand for 5’TTGGCCTTA3’?
DNA and RNA are built from monomers called
In the following acid-base reaction, which species acts as a Brønsted-Lowry base?
HCl(aq) + H2O(l) → Cl−(aq) + H3O+(aq)
A scientist does a monohybrid cross to determine how a trait is inherited and finds that the trait is mostly seen in male offspring. What type of inheritance pattern does this gene show?
Which of the following is the network of capillaries in the kidneys where filtration begins?
Which layer of the skin contains large numbers of blood vessels?
Which of the following is a heterogeneous mixture?
What are the coefficients needed to balance the equation below?
__AgI + __Na2S → __Ag2S + __NaI
What is the oxidation state of the chlorine atom in HCl?
An organism’s genotype is
Which of the following valves prevents blood from going back to the left atrium?
What type of bones make up the wrist and the foot?
What type of reaction is shown below?
2Li + Cl2 → 2LiCl
Within the nucleus, DNA is tightly wound around histones. How does this arrangement regulate gene transcription?
Which property of RNA makes it different from DNA?