Biology STAAR Practice Review

What role do decomposers play in the ecosystem?

• Decomposers convert dead materials into inorganic substances, making nutrients available to primary producers.

• Decomposers produce energy for the ecosystem.

• Decomposers consume primary producers.

• Decomposers are not important in the ecosystem.

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NGSS.MS-LS2-3

What is the primary role of mitochondria in the cell?

• Protein synthesis

• Photosynthesis

• Cellular respiration

• Storing genetic information

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NGSS.MS-LS1-7

How does diffusion differ from osmosis?

• Diffusion involves solid particles, while osmosis involves only liquids

• Diffusion requires energy, while osmosis does not

• Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration, while osmosis is the diffusion of water across a semipermeable membrane

• There is no difference; they are the same process

What is the role of ATP in cellular activities?

• ATP stores genetic information for cell division.

• ATP acts as the primary energy carrier in cells, providing energy for various cellular processes.

• ATP is involved in the synthesis of cell wall in plants.

• ATP serves as a signaling molecule for cellular communication.

Tags

NGSS.HS-LS1-7

What is the equation for photosynthesis? (Note: Use simple format for grade 7 understanding)

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

What does biodiversity refer to?

• The variety of books in a library

• The different types of video games available

• The variety of life in a particular habitat or ecosystem

• The number of bicycles in a city

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NGSS.HS-LS2-2

NGSS.HS-LS2-6

What is the term for the maximum population size that an environment can sustain indefinitely?

• Carrying capacity

• Limiting factor

• Exponential growth

• Logistic growth

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NGSS.MS-LS2-4

Which of the following mechanisms is primarily responsible for the introduction of new alleles into a population's gene pool?

• Genetic drift

• Gene flow

• Natural selection

• Mutation

What is the probability of producing a homozygous recessive offspring from a cross between two heterozygous parents (Aa x Aa)?

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NGSS.HS-LS3-3

Which of the following is NOT a principle of natural selection?

• Variation exists within populations.

• Individuals with advantageous traits are more likely to survive and reproduce.

• Traits are inherited from one generation to the next.

• Individuals can adapt to their environment within their lifetime and pass these adaptations to their offspring.

Answer explanation

The correct choice is that individuals cannot adapt to their environment within their lifetime and pass these adaptations to their offspring, as natural selection acts on inherited traits over generations.

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NGSS.MS-LS4-2