Sc 7 L 17 2

Thomas's dog Max has fleas. The fleas live by feeding on Max's blood. Meanwhile, Max is constantly scratching and does not feel well. The relationship between the fleas and Max can be classified as which of the following?

• Competition

• Mutualism

• Parasitism

• Commensalism

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-4

Three-spined sticklebacks that harbor a tapeworm are less likely to perform courtship behavior correctly and are less successful at reproducing. An image is provided. The tapeworms relationship to sticklebacks can be classified as which of the following?

• Competition

• Mutualism

• Commensalism

• Parasitism

Lindsey is watching honeybees in her grandmother's garden. Her grandmother explains that the bees are helping the flowers to reproduce and in return, bees are gathering the plant's nectar for food. What type of interaction do the honeybees exhibit with the flowers in Lindsey's grandmother's garden?

• Mutualism

• Commensalism

• Parasitism

• Predation

Tags

NGSS.MS-LS1-4

NGSS.MS-LS2-2

In science class, Eric learns about relationships between organisms in nature. The concepts of predation and parasitism tend to confuse him. Which explains the difference between these two concepts?

• Parasitism results in two organisms benefiting while in predation only one organism benefits.

• Parasitism happens quickly, but predation happens over time.

• Predation results in the death of one organism while in parasitism the host may only be harmed.

• Predation and parasitism are the same thing, since only one organism is harmed in each relationship.

An eagle and a grizzly bear both feed on the same species of salmon in the same location. Which type of symbiotic relationship is displayed by the eagle and the bear?

• Competition

• Commensalism

• Predation

• Parasitism

Tags

NGSS.MS-LS2-2

Mutualism is a long-lasting, mutually beneficial interaction among organisms. Which of the following relationships best reflects mutualism?

• A starfish provides a safe place for sea worms to reside; the starfish receives nothing in return.

• Reef corals build a hard protective skeleton that algae live in; the algae provide energy to the coral through photosynthesis.

• Butterfly larvae lay their eggs on jaguars and consume blood and nutrients from the jaguars.

• Galapagos tortoises eat all the branches of cactus plants; the plant is harmed and sometimes dies.

Tags

NGSS.MS-LS2-2

Sharks are the top predator in a marine ecosystem. By consuming smaller organisms, sharks maintain a balance in the population. If the shark population were to decrease, the smaller organisms would increase, interrupting the food web. Which of the following relationships is MOST similar to the relationship described?

• A frog eats flies and lizards in a swamp ecosystem

• Leaf-cutter ants eat grass in a prairie ecosystem

• A wolf eats small mammals in a forest ecosystem

• An owl eats mice and insects in a forest ecosystem

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Ryan lives in a house near a small lake. In the past few months, he has noticed that there has been very little rainfall due to a drought. He monitored the water depth in the lake by inserting a metal cylinder in the sand and marking the water level each week for 4 weeks. He recorded his data in the table below. What would MOST LIKELY take place in the lake ecosystem based on this data?

• The fish population would decrease due to competition for food and shelter

• The deer population would increase due to increased space for habitats

• Trees near the water’s edge will grow twice as fast during the drought

• Fish-eating birds would find it more difficult to catch their prey in the lake

  Submit

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Plant cells have a structure that is not found in animal cells. This structure enables plant cells to carry on photosynthesis. In which cell structure does photosynthesis take place?

• Chloroplast

• Mitochondrion

• Nucleus

• Vacuole

Tags

NGSS.MS-LS1-6

Naomi was looking at cells with a microscope. She knows the cells are classified as either plant cells or animal cells. How can she tell if these cells are plant cells?

• She should look for a large nucleus in the center of the cells.

• She should look for cytoplasm that is filled with organelles.

• She should look for a cell membrane surrounding the entire cell.

• She should look for a cell wall outside of the cell membrane.