SC 7 L 17 3

What statement is TRUE about the graph?

• The prey is the green line because there needs to be more prey than predators.

• The prey is the red line because there needs to be more predators than prey.

• The green line is the producers

• The red line is the producers

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Kelp forests are found off parts of the California coast. They are home to a wide variety of organisms, including sea otters which were once hunted to almost extinction. The diagram shows a simple food web of a kelp forest.

As the sea otters disappeared which of these organisms most likely began to destroy the kelp forests?

• Sea urchins

• Sea stars

• Crabs

• Clams

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Marcus is investigating the flow of energy in a wetland ecosystem near his home. He has created a food web to show this flow of energy. His food web positions several species of plants at the bottom because they supply energy for the rest of the organisms in the ecosystem. Which of the following resources provides energy for the plants?

• air

• soil

• sunlight

• water

Tags

NGSS.MS-LS1-6

Carp have invaded many streams and lakes in North America driving out many native fish. Bighead and silver carp eat microscopic algae and protozoans. Grass carp eat plants growing in the shallow water along the edge of ponds and stream. Black carp eat snails and mussels.

Scientists think they may have an answer to the carp invasion. They will use alligator gars which are native fish. These gars eat all types of fish including carp, so they can be introduced into areas with carp. They may be able to control the carp populations. Which of these correctly shows an energy pyramid that includes alligator gars?

• 
• 
• 
• 

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

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.

Which of the following organelles is only found in plant cells?

• Cell membrane

• Mitochondria

• Chloroplast

• Nucleus

Tags

NGSS.MS-LS1-6

Which organelle is responsible for converting sugars into energy (ATP)?

• Cell wall

• Mitochondria

• Vacuole

• Nucleus

Tags

NGSS.HS-LS1-7

DNA is a long molecule instructing the cell how to function. Which organelle is DNA found in?

• Cytoplasm

• Cell membrane

• Vacuole

• Nucleus

Tags

NGSS.MS-LS3-1

Sheyla is examining a cell under a microscope. She has identified a cell wall, a nucleus, and a chloroplast. What type of organism does this cell most likely belong to?

• a plant

• a fungus

• an animal

• a bacterium

Tags

NGSS.MS-LS1-1

Plant and animal cells are similar in structure and organization; however, there are two organelles that are unique to plant cells. Compared to an animal cell, which organelle is specific to plant cells?

• Cell wall

• Cytoplasm

• Cell membrane

• Chloroplasts