A

Which of these represent the Primary consumers (hint: 2 answers)

Tags

7.5B

How many secondary consumers are found in this food web?​ (a)  

• 3

• 1

• 2

• 4

• 5

Tags

7.5B

A population of beetles has individuals that are either green or brown, depending on certain genes. The green beetles are best able to hide from predators in lush, green vegetation. The brown beetles, on the other hand, are best able to hide on bare, brown soil. A period of drought reduces the amount of plant growth one year.

How is this change most likely to affect the beetle population?

• The number of brown beetles will decrease.

• The number of brown beetles will increase.

• The number of green beetles will increase.

• The number of green beetles will decrease.

Tags

8.11B

What two environmental changes can be found in this image?

• pollution and climate change

• climate change and urbanization

• deforestation and pollution

• urbanization and deforestation

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

NGSS.MS-LS2-5

DDT is a pesticide that was once widely used to control agricultural pests and mosquitoes. However, this pesticide caused the eggshells of certain birds, including the brown pelican, to become fragile and thin. The adults would then accidentally crush the eggs while trying to incubate them.

What happened to the brown pelican populations as a result of DDT use by humans?

• The populations increased much more slowly

• The populations decreased as fewer eggs survived long enough to hatch.

• The populations remained stable over time.

• The populations increased as pelicans laid more eggs so that more offspring would survive.

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-4

NGSS.MS-LS4-4

• Mayflies that were previously abundant are no longer present in the stream
• Stone flies and midges thrive and compete for the same food source
• Large numbers of crayfish are suddenly dead
• Riffle beetles have become more abundant in the stream

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is one way humans are trying to positively impact (help restore) the ocean?

• Over fishing

• Drilling for oil and natural gas

• Creating artificial reefs

• Dumping plastics in the ocean

Tags

NGSS.MS-ESS3-3

NGSS.MS-LS2-5

If additional snakes are introduced into this ecosystem, there will most likely be an immediate decrease in the _________.  

• hawk population

• rabbit population

• wildflower population

• grass population

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-4

An organism that lives by breaking apart dead organic matter into simpler parts is...

• scavenger

• consumer

• decomposer

• carnivore

Tags

NGSS.MS-LS2-3

Which two organisms in this food web are COMPETING for food with each other?

• Cougar and Deer

• Rabbit and Snake

• Insects and Grass

• Shrew and Mouse