The bottle of a chemical used in a biology laboratory is labeled with the following symbol.

What does this laboratory safety symbol indicate about the chemical?

• It is flammable and should not be used around open flames

• It is corrosive and should not be allowed to contact the skin

• It should be heated first before it is used

• It evaporates easily and should be used only under a vent hood.

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NGSS.HS-ETS1-3

Which of the following is NOT found in a carbohydrate?

• nitrogen

• oxygen

• hydrogen

• carbon

In which circumstance would a high rate of mutation in a population be beneficial to the population?

• Only if the environment is changing rapidly

• Only if the environment is changing very slowly over a long period of time

• Only if the environment is very stable

• In any environment regardless of its stability

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NGSS.HS-LS4-4

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Look at the pedigree below. This pedigree shows that only males are affected by a certain disorder. What type of inheritance is indicated by the pedigree?

• dominant

• sex-linked

• incomplete

• recessive

Which two processes cycle carbon and oxygen between living organisms?

• pollination and fertilization

• transpiration and condensation

• cellular respiration and photosynthesis

• oxidation and combustion

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NGSS.HS-LS1-7

NGSS.HS-LS2-5

Millions of acres of rainforests are destroyed each year. Which of the following is a negative result of this human activity?

• a decrease in atmospheric carbon dioxide

• a decrease in biodiversity

• an increase in atmospheric oxygen

• an increase in precipitation

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NGSS.HS-LS2-6

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A biologist performs an experiment on Euglena and records her results in the table below. Based on the data in the table, which question is the biologist trying to answer?

• How quickly do Euglena reproduce in a laboratory setting?

• Does the number of Euglena affect the pH of the water in which they live?

• How does pH affect the survival and reproduction of Euglena?

• What is the life span of Euglena in distilled water?

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-4

Lactase is an enzyme needed to digest milk products containing lactose. Which of the following is MOST likely to occur to the enzyme lactase in the digestion reaction?

• The lactase speeds up the digestion reaction but is unaffected by the reaction

• The lactase binds with the lactose to create waste products

• The lactase burns to ash during the digestion reaction

• The lactase is broken down into simple sugars

A hospital gives a patient an antibiotic to treat a staph infection. Most of the staph bacteria are killed by the antibiotic, but some survive. Which of the following is likely to happen to the surviving staph bacteria?

• They will be killed after a second round of antibiotics

• They will reproduce additional antibiotic-resistant offspring

• They will mutate into beneficial bacteria

• They will struggle to survive in the host patient since their immunity is now weakened

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NGSS.HS-LS3-2

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NGSS.HS-LS4-5

Study the diagram of the food web below. Which statement accurately describes a relationship in the food web?

• The daphnia and the mussels are producers

• The minnow, the newt, the mussels, and the heron all act as secondary consumers

• The algae represents a decomposer

• The heron is an omnivore.

Tags

NGSS.MS-LS2-1

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