Which statement correctly explains a symbiotic relationship?

Mutualism is a relationship in which intestinal bacteria produce Vitamin K in humans.

Parisitism is a relationship in which a spider crab is camouflaged- with seaweed on its back.

Commensalism is a relationship in which a blood-sucking mosquito feeds on the blood of a dog.

Predaton is a relationship in which a plant grows taller in bright sunlight that in a shaded area.

Which of the following would be a negative of cutting down a mature oak forest?

a decrease in the amount of soil that is washed away during storms

an increase in the carbon dioxide released into the atmosphere

The diagram models a rain forest food web. What would be the most likely outcome if all the decomposers were removed from the food web?

There would be decreased competition between the monkeys and the boa constrictors for resources.

There would be increased competition between the banana trees and the grasses for resources.

There would be an increase in waste materials and less nutrients would be returned to the soil.

There would be decreases in waste materials and more nutrients would be returned to soil.

Bees and butterflies both get nectar from flowers as a food source. If most of the flowers died in a particular area, which best describes what would happen to the bees and butterflies?

The bees and butterflies would have to compete for food.

The bees and butterflies would all immediately die from the lack of food.

The bees and butterflies would both benefit from the lack of food.

The bees and butterflies would have to find a new source of food.

How do predators and prey keep an ecosystem stable?

Prey provides food for predators, and the predators help maintain the population of prey.

Both predators and prey compete for resources, controlling the population of plants.

Both predators and prey provide food to plants, allowing their population to increase.

Predators provide food for the prey, and the prey help maintain the poplation of predators.

Bees-Bees play an important par in their environments. They often travel far in search of nectar, which they get from flowers. They drink nectar and also collect pollen. The bes then spread the pollen as they fly around to different flowers. While they fly around, they often get caught and eaten by other organisms, such as wasps. Those that survive and return to their beehives bring back nectar that they stored in a part of their boddes called the crop. They spit out the stored nectar, and other bees in the hive add important things to the nectar that turn the nectar into honey over time. Some of that honey is then eaten by many different types of animals, including bears, raccoons, and skunks.

Bees are important to food chains because they give energy to other insects, and their honey give energy to other animals.

Bees are important for food chains because they add water to the honey they make that cab be absorbed by other animals.

Bees are important they eat a lot of insects and prevent them from eating other animals.

Bees are important to food chains because they scare away other insects that try to eat the flowers in their environment.

The picture shows a sea anemone and a clown fish. the venomous sea anemone feeds on small fish, while the clown fish feeds on tiny living organisms and plants. The sea anemone does not harm the clown fish, and these two organisms survive by living together. Select three reasons why these two organisms are able to live and survive together?

B. The bright colors of the clown fish attract prey for the sea anemone. C. The sea anemone provides shelter and protection for the clown fish. D. The clown fish gets leftover debris to feed on the sea anemone.

A. The clown fish is large and hard for the sea anemone to digest. C. The sea anemone provides shelter and protection for the clown fish. E. The clown fish guards the sea anemone, protecting it from predators.

F. The sea anemone gets new growth by being a source of food for the clown fish. A. The clown fish is large and hard for the sea anemone to digest. D. The clown fish gets leftover debris to feed on from the sea anemone.

C. The sea anemone provides shelter and protection for the clown fish. D. The clown fish gets leftover debris to feed on the sea anemone. E. The clown fish guards the sea anemone. protecting it from the predators.

The picture below shows a pond environment. The small bird in this environment interacts with:

a worm, a biotic factor, as it pulls the worm from the ground for food.

a duck, an abitic factor, as it competes for food against the duck.

the tree, an abiotic factor, as it seeks shade under the tree.

the soil, a biotic factor, as it searches for food inside the soil.

The picture below shows an American pika, a member of the rabbit family, that lives in high alpine mountain ecosystems. The pika's den is an natural piles of rocks and debris, and it cannot survive in the open temperatures above 26∘ C (78∘F). Pikas have disappeared from over one-third of their previous habitats.

The population of pikas will continue to decline until they eventually become extinct.

The pikas will be forced to compete for resources with other organisms lower down the mountain.

The pikas will adjust how their systems respond to heat to survive in the warmer environment.

The population of pikas will increase as their genes mutate and they form thinner coats.

Pick the four things from the list that can cause the extinction of a species.

A. pollution B. loss of habitat D. humans hunting E. loss of food source

B. loss of habitat C. predators move away D humans hunting E. loss of food source

A. pollution B. loss of habitat C. predators move away D. humans hunting

B. loss of habitat C. predators move away E. loss of food source F. competitor goes extinct

Introduction to Ecology and Roles in Energy Transfer Review

Authored by Angelika Lindsey

Science

7th Grade

NGSS covered

Used 186+ times

Introduction to Ecology and Roles in Energy Transfer Review

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The size of a population is always changing based on:

Biotic Factors

Abiotic Factors

All interactions affecting that population

All of these

Which level of organization is pictured here?

ecosystem

organism

community

populatiom

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which level of organization is this?

organism

community

population

abiotic

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a biotic limiting factor in an ecosystem?

New predators move into the ecosystem.

Living space is lost due to human activities.

A drought occurs for several months.

A hurricane passes through an ecosystem.

What level of organization is pictured here?

ecosystem

organism

community

population

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does abiotic mean?

something that is considered to be physical rather than biological

something that is considered living or once was alive

Which level organism is pictured here?

biome

community

organism

ecosystem

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Introduction to Ecology and Roles in Energy Transfer Review

The size of a population is always changing based on:

Which level of organization is pictured here?

Which level of organization is this?

Which of the following is an example of a biotic limiting factor in an ecosystem?

What level of organization is pictured here?

What does abiotic mean?

Which level organism is pictured here?

Which is an example of abiotic features in an environment?

Which best describes the role that all species play within an ecosystem?

What term refers to the zooplankton in the food chain above?

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