Bio Eoc Practice Test 2 Questions And Answers | Fall 2026 | 100% Correct

BIO EOC PRACTICE TEST 2
QUESTIONS AND ANSWERS | FALL
2026 |
1. Which of the following resulted from the invention of the microscope?
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A. the development of the theory of evolution
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B. the development of the cell theory
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C. proof that cells can form spontaneously
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D. proof that all cells have the same basic structure - ANSWERS-B
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2. The potato famine in Ireland (1845-
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1852) occurred when a fungus escaped by chance out of Mexico and into North A
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merica and Europe. The fungus, which caused crop-
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destroying potato blight, apparently came from a single clonal genotype The potat
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o population was probably vulnerable to infection by this fungus because of which
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of the following?
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A. lack of genetic drift
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B. not enough organisms
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C. lack of genetic variation
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D. balanced polymorphism - ANSWERS-C
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3. Lipid synthesis is carried out in which part of the cell?
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A. smooth endoplasmic reticulum
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B. rough endoplasmic reticulum
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C. ribosomes
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D. lysosomes - ANSWERS-A
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4. In hamsters, the gene for short hair (H) is dominant to the gene for long hair (h
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). Which is the most likely genotype of the parents if 4 of their 8 offspring have lon
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g hair
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A. Hh X hh
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B. Hh X Hh
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C. HH X hh
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D. hh X hh - ANSWERS-A
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5. Which of hte following is a limiting factor that is density-independent?
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A. an outbreak of disease
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B. a forest fire caused by lightning
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C. immigration of new predators
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D. competition for scarce resources - ANSWERS-B
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6. Which of the following classifications includes all three of the others?
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A. family
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B. genus
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C. phylum
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D. order - ANSWERS-C
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, 7. A certain enzyme oxidizes ethanol. If a genetic defect prevents the enzyme fro
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m being produced, which outcome do you predict would occur?
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A. Ethanol would undergo reduction, which is the opposite process of oxidation.
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B. The oxidation of ethanol would proceed only in certain locations in the cell.
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C. The cell would employ a different enzyme to oxidize ethanol.
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D. The oxidation of ethanol in the cell would happen very slowly or not at all. -
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ANSWERS-D
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8. Which of the following is a key difference between mitosis and meiosis?
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A. Mitosis allows for genetic variation, while meiosis results in generations of orga
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nisms with stable characteristics
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B. Mitosis produces cells that are almost identical genetically, while meiosis produ
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ces cells that differ genetically from each parent or from each other.
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C. Mitosis produces cells that are almost identical genetically, while meiosis produ
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ces cells that differ genetically from each parents or from each other
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D. Mitosis has two cell divisions, while meiosis has only one. - ANSWERS-C
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9. Gymnosperms, or conifers, scatter their seeds by which of the following method
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s?
A. eaten by animals and dropped in feces
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B. carried by animals
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C. blown by the wind
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D. all of the above - ANSWERS-C
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10. Which of the following best describes osmosis?
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A. the movement of water molecules out of a cell, resulting in cell shrinkage
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B. the movement of small, uncharged molecules across the lipid bilayer to a state
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of equilibrium
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C. the movement of charges molecules and larger molecules into and out of the c
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ell
D. the movement of water molecules across the selectively permeable plasma me
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mbrane - ANSWERS-D b7 b7




11. Look at the marine food web shown below. Phytoplankton -> zooplankton -
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> Menhaden & crabs -> Lobster, Shrimp -> Crabs & Lobster.
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The removal of the lobster from this food web will have which long-
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term effect on the ecosystem?
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A. the zooplankton population will increase
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B. the crab population will increase
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C. the shrimp population will decrease
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D. the phytoplankton population will increase - ANSWERS-B
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12. A person has a high level of high-
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density lipoproteins (HDL). Which of the following best describes this situation?
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A. HDL is less dangerous to a person's system because it is able to send cholest
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erol to the liver for elimination
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B. HDL is more dangerous to a person's system
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C. HDL levels cannot be treated because they are always the result of family inhe
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ritance