what type of chemical bond connects the oxygen and hydrogen atoms in a molecule of water?
a. static bond
b. aquatic bond
c. ionic bond
d. covalent
... [Show More] bond
covalent bond
which of the following statements describes a chemical property of water?
a. water has pH of 1.
b. a water molecule contains 2 hydrogen atoms and 1 oxygen atom.
c. a water molecule contains 2 oxygen and 1 hydrogen atom.
d. the chemical formula for water is HO2.
a water molecule contains 2 hydrogen atoms and 1 oxygen atom.
which of the following is needed for an experiment to be considered successful?
a. a reasonable hypothesis
b. a well-written lab report.
c. data that others can reproduce
d. computer-aided statistical analysis
data that others can reproduce
an atom has 2 protons, 4 neutrons, and 2 electrons. what is the approximate atomic mass of this atom?
a. 2
b. 4
c. 6
d. 8
protons + neutrons = atomic mass
2+4=6
which of the following is true regarding T cells?
a. they are only seen in those with leukemia
b. they are a specialized type of red blood cell
c. they mature in the thyroid
d. they play a role in the immune response
they play a role in the immune response
what type of bond is formed when electrons are transferred between atoms?
a. transfer bond
b. static
c. covalent bond
d. ionic bond
ionic bond
what is the primary function of antibodies?
a. production of white blood cells
b. initiates gluconeogenesis
c. promotes the intracellular storage of lipids
d. facilitate the breakdown of antigens
facilitate the breakdown of antigens
which statement below best describes the process of condensation?
a. condensation is the process of changing from a gas to liquid.
b. condensation is the process of changing from a liquid to gas.
c. condensation is the process of changing from a solid to gas.
condensation is the process of changing from a gas to liquid.
which of the following lists the normal blood flow through the heart?
a. left ventricle, left atria, body, right ventricle, right atria, lungs
b. left atria, left ventricle, lungs, right atria, right ventricle, body.
c. right atria, right ventricle, lungs, left atria, left ventricle, body
d. right ventricle, right atria, body, left atria, left ventricle, lungs
right atria, right ventricle, lungs, left atria, left ventricle, body
which of the following functions is not controlled by the autonomic nervous system?
a. digestion
b. walking
c. heartbeat
d. temperature regulation
walking
every child in a certain family suffers from autism. based on this evidence, what possible conclusion can be drawn about autism?
a. autism may be lethal
b. autism may be genetic
c. autism is related to traditional nuclear family structure.
d. no conclusion can be drawn based on this evidence.
autism may be genetic
women were more likely to die in childbirth in the 18th century than in the 21st century. what is a possible explanation for why women are less likely to die in child birth in the present age?
a. doctors are better equipped to perform cesarean sections
b. doctors have more tools to monitor mothers during childbirth, so complication ban be detected much earlier.
c. doctors wash their hands well to avoid transferring germs and infections.
d. all of the statements above offer reasonable explanations for decreases in mortality during childbirth.
all of the statements above offer reasonable explanations for decreases in mortality during childbirth.
a dietitian wants to convince a patient to lose weight. which statement below best communicates a scientific argument that justifies the need for weight loss?
a. losing weight can lower blood pressure, increase energy level, and promote overall health.
b. society tends to treat overweight people unfairly
c. members of the opposite sex are more interested in people who maintain a healthy weight.
d. losing weight is easy to do.
losing weight can lower blood pressure, increase energy level, and promote overall health.
a researcher wants to investigate the relationship between family income and quality of medical care. which statement provides the best reason to conduct this investigation?
a. the researcher can learn more about wealthy people and ask them for money.
b. the investigation can help target healthy people so that they can remain healthy.
c. results of this investigation may identify a group of people who do not receive quality medical care so that these people could receive better medical treatments.
d. there is no reason to conduct this investigation.
results of this investigation may identify a group of people who do not receive quality medical care so that these people could receive better medical treatments.
which of the following best describes the primary function of Bartholin's gland?
a. secretes hormones that help the body respond to stress
b. provide lubrication for the vagina
c. helps control growth and development of the body
d. stimulate the development of T cells.
provide lubrication for the vagina
Mildly elevated levels of thyroxine will do what to the heart rate?
a. stop the heart rate
b. no effect
c. decrease the heart
d. increase the heart rate
increase the heart rate
which nervous system controls voluntary motor movement?
a. parasympathetic
b. sympathetic
c. autonomic
d. somatic
somatic
which of the following functions would be most affected by laryngeal damage?
a. blinking
b. walking
c. singing
d. hearing
singing
a researcher is studying the response of bacteria to a certain chemical. in three experiments, the bacteria swim towards the chemical, and in one experiment the bacteria swim away fro it. what would be the most appropriate next step for the researcher?
a. report only the first three experiment
b. report all the experiments, but refrain from making any conclusions.
c. repeat the experiment several more times and apply a statistical analysis to the data.
d. repeat the experiment, adding a new chemical to determine its effect on the bacteria.
repeat the experiment several more times and apply a statistical analysis to the data. [Show Less]