Hsa Practice Test 1
HSA Practice Test 1
- 1.
A student used a microscope to observe several protists. The student sketched the protists and recorded their magnifications. The drawings and measurements are shown below. Which of these protists is the largest?- A.
Difflugia
- B.
Stentor
- C.
Euglena
- D.
Paramecium
- 2.
What is the lowest level of the energy pyramid that contains carnivores?
- A.
Level 1
- B.
Level 2
- C.
Level 3
- D.
Level 4
- 3.Scientists classify humans as omnivores, based on their teeth. As omnivores, humans eat _____.
- A.
Only fungi
- B.
Mostly plants and animals
- C.
Only animals
- D.
Mostly bacteria and fungi
- 4.
How would the populations of other organisms in the energy pyramid be affected if the population of sea urchins suddenly decreased?
- A.
Both the kelp and the sheephead populations would increase.
- B.
Both the kelp and the sheephead populations would decrease.
- C.
The kelp population would decrease, and the sheephead population would increase.
- D.
The kelp population would increase, and the sheephead population would decrease.
- 5.On Earth, water cycles through the atmosphere, oceans, land, and organisms. By what process does most of the water in plants return to the environment?
- A.
Evaporation from the roots
- B.
Condensation on the leaves
- C.
Evaporation from the leaves
- D.
Diffusion from the roots
- 6.A drop of iodine is placed in a test tube containing a sample of an unknown solution. The solution turns blue-black. This indicates that the unknown contains _________.
- A.
Glucose
- B.
Lipid
- C.
Starch
- D.
Protein/
- 7.A piece of potato is rubbed on a small sheet of brown paper. What would you expect to see?
- A.
A wet spot
- B.
A translucent spot
- C.
Nothing at all
- 8.Cells, such as bacteria cells, which lack a membrane-covered nucleus and have few organelles, are called ________________.
- A.
Chloroplasts
- B.
Probiotic
- C.
Prokaryotes
- D.
Eukaryotes/
- 9.Which of the following is a major component of cell membranes?
- A.
Carbohydrate
- B.
Lipids
- C.
Proteins/
- 10.Which element, found in proteins, is NOT present in carbohydrates or lipids?
- A.
Carbon
- B.
Hydrogen
- C.
Oxygen
- D.
Nitrogen/
- 11.Bacteria in deep undersea thermal vents store energy using inorganic compounds, not light. This process is known as __________.
- A.
Chemosynthesis
- B.
Photosynthesis
- C.
Diffusion
- D.
Mitosis/
- 12.Glucose is able to break down into two energy-packed ATPs without the help of oxygen in ______________ respiration.
- A.
Aerobic
- B.
Anaerobic
- C.
Nuclear
- 13.A student places an Elodea plant in a test tube of water under a strong light. After a while the student notices tiny bubbles forming on the surface of the Elodea leaves. These bubbles likely contain mostly ___________.
- A.
Oxygen
- B.
Nitrogen
- C.
Carbon
- D.
Carbon dioxide
- 14.During prophase I, sections of homologous chromosomes switch places. What is this process called?
- A.
Binary fission
- B.
Mutation
- C.
Crossing over
- D.
Cytokinesis
- 15.A sperm cell of a fruit fly has 4 chromosomes. How many chromosomes are in the cells of a fruit fly’s leg?
- A.
2
- B.
4
- C.
8
- D.
16
- 16.In a species of fly, the allele for red eyes (R) is dominant to the allele for brown eyes (r). Red eye color in the flies is not sex-linked. Students crossed male and female flies that had red eyes and recorded the eye color of their offspring. Their data are shown below. Fly Offspring Eye Color Number of Offspring Red 77 Brown 27 What are the most likely genotypes of the parent flies?
- A.
RR
- B.
Rr
- C.
Rr
- D.
RR
- 17.Which of the following processes occurs ONLY in plants?
- A.
Respiration
- B.
Mitosis
- C.
Photosynthesis
- 18.In rabbits, short fur (F) is dominant to long fur (f). What are the chances that two heterozygous short-haired rabbits will have offspring with short fur?
- A.
100%
- B.
75%
- C.
50%
- D.
25%
- 19.Oxygen levels increase in a pond during the day. This happens as a result of what process?
- A.
Respiration
- B.
Replication
- C.
Photosynthesis
- 20.
The following table provides data on the population growth of bacteria over time. According to the data table, which of the following is true?
- A.
The graph of data would be a straight line with a slope of 2.
- B.
The number of bacteria doubles every twenty minutes.
- C.
At 140 minutes, there should be about 96 bacteria.
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