Why are there usually only 3-5 trophic levels in a food chain?

• because there's not enough carbohydrates to sustain another level

• there's not enough energy at higher trophic levels to sustain more predators because only 10% of it can be transferred at each step

• because there is not enough nitrogen transferred up the food chain

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Organisms that cannot make their own food and are dependent on autotrophs for survival are known as

• detritus

• phytoplankton

• autotrophs

• heterotrophs

The broken down materials released in the water from scavengers and full of organic particles is called

• decomposers

• detritus

• phytoplankton

• rainbow sprinkles

Tags

NGSS.MS-LS2-3

Most of the photosynthesis on Earth is done by

• trees in rainforests.

• grasses in savannahs.

• phytoplankton in the ocean.

• kelp in the ocean

Tags

NGSS.MS-LS1-6

When you consume an organism, you only receive 10% of the energy, but how much of the toxins do you receive?

• All of the toxins (｡•́︿•̀｡)

• 10% toxins

• 1% toxins

• None of the toxins

Tags

NGSS.MS-LS2-3

What is the primary role of producers in a marine food web?

• To consume other organisms

• To decompose dead matter

• To convert energy from the sun into food energy

• To act as top-level predators

Tags

NGSS.MS-LS2-3

Which of the following is a common producer in the marine environment?

• Zooplankton

• Dolphins

• Sharks

• Phytoplankton

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which organism is an example of a top-level consumer in the marine food web?

• Phytoplankton

• Zooplankton

• Shark

• Seaweed

Tags

NGSS.MS-LS2-3

Which of the following organisms is considered a primary consumer in a marine ecosystem?

• Shark

• Seaweed

• Zooplankton

• Phytoplankton

What is the role of primary consumers in a marine ecosystem?

• To produce energy from sunlight

• To consume producers and transfer energy to higher trophic levels

• To decompose dead organisms

• To act as top-level predators

Tags

NGSS.MS-LS2-3