This is our second free GED Science practice test. All of these questions are based on the 2021 GED, which has definitely become more challenging over the years. The questions will be on a wide range of topics, with a focus on designing and interpreting science experiments and using number and graphics in science.
Directions: Choose the best answer to each question.
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Animals that feed exclusively on plants are called:
What is the island's approximate carrying capacity for fur seals?
If the couple has another child, what is the probability that this child will have brown hair?
Homozygous indicates two identical genes for a hereditary characteristic. In this case, the woman has two genes for red hair (bb). The genes are in lower case since they are recessive. She only has genes for red hair, so she has red hair.
You can solve this type of problem by filling out a Punnett Square as shown below:
Children with the genes BB will have brown hair, but none of the children have this combination of genes.
Children with the genes Bb will also have brown hair (because B is dominant), and 2 out of every 4 children, or 50%, will have brown hair.
Children with the genes bb will have red hair, and 2 out of every 4 children will have red hair.
Which additional information would be the most useful in helping her design this experiment?
The types of pesticides that are used in Napa Valley.
The types of parasites that are present in Napa Valley.
The types of pathogens that are present in Napa Valley.
The types of pesticides that the USDA evaluated.
A measure of 70 °F is equal to which of the following in Celsius? You may use your calculator.
°C = (°F − 32) * 5/9
°C = (70 − 32) * 5/9
°C = 38 * 5/9
°C = 21.1111
What are the independent and dependent variables in this experiment?
The independent variable is the duration of exposure to Vancomycin; the dependent variable is bacterial colony size.
The independent variable is the bacterial colony size; the dependent variable is the duration of exposure to Vancomycin.
The independent variable is the bacterial colony size; the dependent variable is the type of bacteria.
The independent variable is the duration of exposure to Vancomycin; the dependent variable is the type of bacteria.
In this case the bacteria colony size depends on the duration of exposure and the type of bacteria. In this study there are two independent variables and there is one dependent variable. The independent variables are the duration of exposure to Vancomycin and the type of bacteria used. The dependent variable is the bacterial colony size, which depends on length of exposure to the antibiotic.
Based on these results, Vancomycin is most effective against:
It is equally effective against Staphylococcus and Streptococcus.
A cladogram is a diagram that organizes species into groups based on their similarities. It also shows evolutionary relationships among the groups.
Based on the information in this cladogram, which of these statements is true?
Primates evolved from sharks.
The original ancestor of all the species on the cladogram had a bony skeleton.
Dinosaurs are more closely related to crocodiles than they are to amphibians.
Ray-finned fish have an amniotic egg.
The cladogram shows that dinosaurs and crocodiles are closely related. They both have an amniotic egg and they both have two post-orbital fenestrae. Amphibians branched off before either of these developments, so they are less closely related.
Primates and sharks are on two different branches of this cladogram, so primates did not evolve from sharks. The cladogram shows that the original ancestor of all of these species was a vertebrate, but the original ancestor of the shark did not have a bony skeleton. Ray-finned fish branched off before the evolution of the amniotic egg.
The laboratory has published findings in which they claim that the new flu vaccine can prevent the influenza virus. However, a competing lab has criticized the findings, claiming that there is an error in the way the groups were setup. What changes to the test setup would eliminate the source of the error?
Test a fifth group at a higher dosage than 200 mg.
Only use two groups instead of four groups so the data is easier to compare.
Make the difference in the dosage amount between the groups much larger.
Add a fifth group to the study and set the dosage to 0 mg/day.
What is the mean time, in seconds, for all of the bicycle racers?
Mean = (103 + 110 + 116 + 125 + 116 + 144) ÷ 6
Mean = 714 ÷ 6
Mean = 119
GED Science Practice Test 3 >>