Biology

Where does the light that most plants use for photosynthesis come from?

• water reflections

• the Sun

• Earth

• electric lights

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following molecules is present in all living organisms?

• carbon

• sulfur

• silicon

• calcium

Which organisms are always on the first level in a food chain?

• herbivores

• consumers

• autotrophs

• heterotrophs

Read the passage "A Food Chain on TV" in the box

If Khloe were to draw a food chain for the environment on the nature program, to which

living thing should the last arrow point?

• cheetah

• grass

• zebra

• shrubs

Tags

NGSS.MS-LS2-3

A food web is shown. Which organisms feed on both producers and decomposers?

• Protozoa

• Amphipods

• Crayfish

• Catfish

Tags

NGSS.MS-LS2-2

The diagram shows a general representation of an energy pyramid for a living system. As energy flows through the pyramid,

• 10% of available energy is passed to each increasing trophic level.

• 25% of energy is gained at each increasing trophic level.

• energy remains the same at each trophic level.

• energy increases at each trophic level.

Tags

NGSS.MS-LS2-3

The diagram shows a simple food chain. Which organism in the food chain receives energy as a secondary consumer?

• wheat

• snake

• mouse

• kestrel

Tags

NGSS.MS-LS2-3

What must be present in an environment for a producer to maintain its function in an energy pyramid?

• carnivores

• parasites

• sunlight

• herbivores

Tags

NGSS.MS-LS2-3

A food pyramid is shown below. Which of the following describes the energy transfer between the levels in the food pyramid?

• Energy travels up the food pyramid.

• Energy stays in the lowest level in the food pyramid.

• Energy stays in the highest level in the food pyramid.

• Energy travels down the food pyramid.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following statements is true of photosynthesis?

• Chlorophyll in animal cells helps convert light energy to food energy.

• Oxygen is taken in and carbon dioxide is released.

• Sunlight provides the energy for the process.

• Glucose is taken in and water is produced.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3