7th Grade Science 1st Semester Exam

If an organism is uni-cellular and one of the oldest life forms known to man - this organism would be listed in which domain?

• Eukaryotic

• Bacteria

• Archaea

• Phylum

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NGSS.MS-LS1-1

Which list of characteristics describes organisms classified as animals?

• Unicellular, prokaryotic, autotrophic

• Multicellular, eukaryotic, heterotrophic

• Unicellular, eukaryotic, heterotrophic

• Multicellular, eukaryotic, autotrophic

Tags

NGSS.MS-LS1-3

The stingray, group of anemonefish, coral, starfish, saltwater, and sand all make up a level of organization called a reef —

• community

• ecosystem

• organism

• population

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Interactions in a desert community are shown in the diagram below. Which statement is a valid inference based on the diagram?

• The majority of organisms synthesize energy.

• All organisms rely on energy from secondary consumers.

• Certain organisms compete for vital resources.

• All organisms occupy the same niche and compete.

Tags

NGSS.MS-LS2-1

The picture below shows the division of three taxonomic levels. The taxonomic levels represented in this picture are the three —

• classes, the lowest levels of organization, and their associated phyla.

• domains, the broadest levels of organization, and their associated kingdoms.

• kingdoms, the broadest levels of organization, and their associated phyla.

• orders, the lowest levels of organization, and their associated domains.

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All living organisms need energy to function. Both unicellular organisms and multicellular organism retrieve energy using —

• lysosomes to break down harmful cells.

• mitochondria to do cellular respiration.

• ribosomes to make storage proteins.

• vacuoles to make energy-rich fats.

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NGSS.MS-LS2-3

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A diagram of an aquatic food web is shown below. Crayfish in rivers are small but numerous. They compete with one another for —

• minerals in the soil.

• small living fish.

• fallen leaves from trees.

• scraps from dead animals.

Tags

NGSS.MS-LS2-1

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Which of the following is NOT a reason why scientists classify organisms?

• So that scientists all over the world can talk about organisms with a common language

• So that scientists can organize all the different types of organisms to study them better

• So that scientists can more easily identify new organisms that are discovered

• So that scientists can tell the order in which the organisms were discovered

The most basic form of classification for organisms is by placing them into one of three domains. Which parts of an organism are observed in order to determine its domain?

• cells

• molecules

• organs

• tissues

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

A diagram of a terrestrial food web is shown below. Which two organisms are most likely to compete for water, minerals, and sunlight?

• Pronghorn antelope and Bachmann's sparrow

• Green lynx spider and honey bee

• Texas walnut and cutleaf daisy

• Bald eagle and cutleaf daisy

Tags

NGSS.MS-LS2-1

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