Natural selection occurs when:

beneficial traits increase survival and reproduction

Natural selection could change fur color distribution of rabbits in snowy environments by:

favoring rabbits with white fur, increasing their frequency over time

favoring rabbits with dark fur, increasing their frequency over time

causing all rabbits to lose their fur

making all rabbits have the same fur color regardless of environment

Genetic variation is necessary for natural selection because it provides the differences in traits that natural selection can act upon, allowing populations to adapt to changing environments.

It provides the differences in traits that natural selection can act upon, allowing populations to adapt to changing environments.

It ensures all individuals have identical traits, preventing adaptation.

It eliminates all genetic differences, making populations less diverse.

It causes populations to remain unchanged over time.

Algae provide energy to coral by:

Performing photosynthesis and sharing energy-rich compounds with the coral.

Absorbing nutrients from coral and storing them.

Breaking down coral tissues for energy.

Producing toxins that stimulate coral growth.

Fewer algae could affect coral survival by:

reducing the energy available to corals, potentially leading to coral starvation and death.

increasing coral growth and reproduction.

providing more nutrients for coral health.

making corals more resistant to disease.

A mutation could affect an enzyme by:

changing the amino acid sequence, potentially altering its shape and function, which could reduce or eliminate its activity.

increasing the enzyme's activity without changing its structure.

making the enzyme immune to mutations.

causing the enzyme to always function better.

One possible effect this mutation could have on cell function is:

The cell may not be able to carry out the chemical reaction the enzyme catalyzes, disrupting normal cell processes.

The cell will produce more enzymes than usual, enhancing all chemical reactions.

The mutation will cause the cell to divide faster than normal.

The cell will become immune to all diseases.

Decreased rainfall could affect plant populations in a desert ecosystem by:

causing plant populations to decline due to drought stress and inability to survive

increasing plant growth due to more sunlight

making plants more resistant to pests

leading to higher water availability for plants

Identify one adaptation that helps desert plants survive drought conditions.

Development of deep root systems to access underground water

Broad, flat leaves to maximize sunlight absorption

Production of large, colorful flowers to attract pollinators

Thin, shallow roots to absorb surface water quickly

Describe how respiratory and circulatory systems work together to deliver oxygen to cells.

The respiratory system brings oxygen into the lungs, where it diffuses into the blood. The circulatory system then transports the oxygen-rich blood to cells throughout the body.

The circulatory system brings oxygen into the lungs, and the respiratory system transports it to cells.

The respiratory system delivers oxygen directly to cells without the circulatory system.

The circulatory system removes oxygen from cells and delivers it to the lungs.

Mutations contribute to evolution by introducing new genetic variations, some of which may provide advantages that are selected for over generations.

Mutations introduce new genetic variations that may provide advantages, driving evolution.

Mutations always result in harmful traits that stop evolution.

Mutations prevent genetic diversity and slow down evolution.

Mutations only occur in response to environmental changes and do not affect evolution.

Energy flows through a food web in which direction?

From producers to consumers and then to decomposers, with energy being lost as heat at each trophic level.

From decomposers to consumers and then to producers, with energy being gained at each trophic level.

From consumers to producers and then to decomposers, with energy being gained as heat at each trophic level.

From producers directly to decomposers, skipping consumers, with no energy loss.

One strategy humans could use to reduce habitat destruction is:

Establish protected areas and wildlife reserves to conserve natural habitats.

Increase urban development in natural areas.

Promote deforestation for agriculture.

Encourage mining in wildlife habitats.

Biodiversity is important for ecosystem stability because it increases ecosystem resilience, allowing it to better withstand disturbances and maintain functions such as nutrient cycling and food web stability.

It increases ecosystem resilience, allowing it to better withstand disturbances and maintain functions.

It reduces the number of species, making the ecosystem simpler.

It causes ecosystems to become unstable and lose functions.

It prevents nutrient cycling and food web stability.

Life Science: Biology Regents Practice Examination #2

Authored by Mister Green

Science

9th Grade

NGSS covered

Used 6+ times

Life Science: Biology Regents Practice Examination #2

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50 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement best describes a function of the cell membrane?

Produces energy

Stores genetic information

Controls movement of materials

Produces proteins

Tags

NGSS.MS-LS1-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In plants, sugars produced during photosynthesis are transported through:

xylem

phloem

stomata

chloroplasts

Tags

NGSS.MS-LS1-7

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which process releases energy from glucose for cellular activities?

photosynthesis

respiration

transcription

diffusion

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A mutation in a gene may result in:

change in amino acid sequence

change in chromosome number

cell death

increased ATP

Tags

NGSS.MS-LS3-1

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Evolution is best described as:

individuals changing traits

populations changing genetically over generations

organisms choosing traits

immediate adaptation

Tags

NGSS.MS-LS4-4

NGSS.MS-LS4-2

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Producers are organisms that:

break down dead organisms

convert sunlight to chemical energy

eat plants

recycle nutrients

Tags

NGSS.MS-LS2-3

NGSS.MS-LS1-6

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which process removes carbon dioxide from the atmosphere?

respiration

photosynthesis

combustion

decomposition

Tags

NGSS.MS-LS1-6

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Life Science: Biology Regents Practice Examination #2

Which statement best describes a function of the cell membrane?

In plants, sugars produced during photosynthesis are transported through:

Which process releases energy from glucose for cellular activities?

A mutation in a gene may result in:

Evolution is best described as:

Producers are organisms that:

Which process removes carbon dioxide from the atmosphere?

Which molecule stores genetic information?

Which relationship benefits one organism and harms another?

During protein synthesis, mRNA carries information from:

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