The opening of the test tube is pointed toward the student and the student is not wearing goggles.
2) The beaker has water in it and the flame is under the tripod.
3) The test tube is unstoppered and the student is not wearing goggles.
4) The flame is too high and the test tube is unstoppered.
test a hypothesis
predict the independent variable
Design a research plan for an experiment
Water passes into an animal cell causing it to swell
The release of insulin lowers the blood sugar level in a human after eating a mea.
Guard cells contribute to the regulation of water content in a geranium plant
A runner perspires while running a race on a hot summer day.
1) regulate the shape of molecules involved in cellular communication
2) determine the diversity necessary for evolution to occur
3) keep the internal body environment within its normal range
4) direct the synthesis of altered genes that are passed on to every cell in the body
1) Antibodies against the virus form in the blood.
2) Enzymes released from platelets hydrolyze the virus.
3) Antigens from the vaccine deactivate the virus.
4) Hormones in the blood inhibit reproduction of the virus.
Nitrogen and carbon
2) nitrogen and oxygen
3) hydrogen and oxygen
4) hydrogen and carbon
Protein is present
Glucose is present
Protein is not present
Glucose is not present
The high temperature causes the shape of the enzyme to be altered.
Not enough substrate is present at these high temperatures
Excess acids have been building up, causing the enzyme to become fatigued.
Too much substrate is present at these high temperatures.
1) It utilizes a different method of data collection.
2) It differs in the one variable being tested.
3) It tests a different hypothesis.
4) It has more variables.
A.) a gene mutation occurred that resulted in brown hair and brown eyes
B.) gene expression must change in each generation so evolution can occur
C.) the child received genetic information from each parent
D.) cell from his mother’s eyes were present in the fertilized egg.
A.) bacterial cells will destroy defective human genetic material
B.) bacterial cells may form a multicellular embryo
C.) the inserted human DNA will change harmful bacteria to harmless ones
D.) the inserted human DNA may direct the synthesis of human proteins
Increase in its size
Synthesized need for oxygen
Regulate the shape of molecules involved in cellular communication
Determine the diversity necessary for evolution to occur
Keep the internal body environment within its normal range
Direct the synthesis of altered genes that are passed on to every cell in the body
Members of the population exceed the carrying capacity
Members of the population decrease in number
Population passes on those genes that result in favorable adaptations
Variations in the population decrease over time
1) are highly specific in their actions
2) are involved in digestion
3) slow the rates of chemical reactions
4) are produced by nerve cells
The individuals who survived were able to produce antibodies against the ebola virus
80% of the population had a natural immunity to the Ebola virus
80% of the population was infected with a viral antigen
The individuals who survived were not exposed to the Ebola antigens.
Here's an interesting quiz for you.