Interactions in Ecosystem

Which of these is a nonliving part of an ecosystem?

• Fish

• Trees

• Fungi

• Water

One year, an ecosystem receives only a small amount of its usual rainfall. Which of these is most likely to happen because of the lack of rain?

• Al animal and plant populations will die.

• Only the plant population will reduce in number.

• Only the animal population will reduce in number.

• Both plant and animal populations will reduce in number.

Which of these is an example of two species interacting in an ecosystem?

• A lizard sunning itself on a rock.

• An Arctic fox preying on a lemming.

• A meerkat standing next to another meerkat.

• Roots of a tree moving water up a trunk.

Which of the following is a living part of a ecosystem?

• Air

• Soil

• Rock

• Bacteria

What is an organism’s niche?

• Habitat an organism lives in

• Role an organism plays in an ecosystem

• Nest or burrow where an organism sleeps at night

• Places in an ecosystem where an organism can be found

Which of these is a way that competition helps ecosystems?

• Strongest and healthiest organisms are most likely to survive.

• Prey organisms gradually disappear from the ecosystem.

• Populations of competing species will increase.

• There will be more food for each individual to eat.

Which of these is an example of symbiosis?

• Bullfrogs eating pond insects

• Birds eating ticks off of a warthog

• Plants crowding out native species

• Meerkat populations living together

Which of these is not a benefit of the symbiotic relationship between the bullhorn acacia tree and acacia ants?

• The ants attract other insects to the tree

• The tree produces nectar for the ants to eat

• The ants sting animals that eat acacia ants

• The thorns on the tree provide nesting sites for the ants

I’m the symbiotic relationship between the mistletoe plant and it’s host tree, how does the mistletoe damage it’s host?

• It infects the tree with disease

• It blocks the sun from the trees leaves

• It takes water and nutrients away from the tree

• It wraps vines around the tree’s trunk that choke the tree.

What is the symbiotic relationship between a shark and a remora?

• Remoras attach to sharks and clean their bellies

• Remoras hide from sharks so they do not get eaten

• Remoras ride with sharks to eat the scraps of their prey. .

• Remoras attach themselves to sharks and suck their blood.