8th grade - b2 - energy flow-traits-natural selection

How much energy moves up the Food Pyramid, from one trophic layer to the next?

• 1%

• 10%

• 50%

• 100%

If the primary consumers have 60 joules of energy, how much energy did the producers have?

• 6 joules

• 60 joules

• 600 joules

• a lot- and let's just leave it at that!

If the producers in a food pyramid have 7000 joules of energy, then the primary consumers will have -

• 7 joules

• 70 joules

• 700 joules

• pick me!

If the producers in a food pyramid have 8,000 joules of energy, then the secondary consumers will have-

• 8 joules

• 80 joules

• 800 joules

• 632 joules!

Giraffes are able to eat leaves high in the trees because-

• they all grew their necks longer. That was a hard day.

• The giraffes with naturally longer necks ate better and survived to have more children.

• the trees adapted to their awesome necks!

• the giraffes decided it was a good idea.

Following the onset of pollution and and ash on the trees, why did the light colored moths quickly disappear?

• they were easily seen by predators and eaten. They did not have a chance to reproduce.

• they flew away to find cleaner trees.

• their great war with the dark colored moths did not go well...

• their trait of light colored wings helped them to find each other

Survival of the fittest-

(click all of the correct answers)

• it all takes place on an island. People get to vote on who stays!

• means that the organism with traits best suited to its ecosystem, will survive and have the chance to reproduce.

• this is the idea behind natural selection.

• the organisms that survive are able to pass on their traits in their DNA

In the snow, rabbits with white fur survive and reproduce while wolves find and eat the brown rabbits. Soon there are only white rabbits left. This change in the rabbits from brown to white fur is called-

• lucky!

• smart!

• adaptation (the rabbit population has adapted to the snowy habitat)

• rabbity goodness!

In primary succession, we start with bare rock. The first organisms to arrive are ...

• grass and ants (also known as the invader species)

• lichens and mosses (also known as a pioneer species)

• bugs and more bugs (also known as bugs)

• trees and larger animals (also known as the climax community)

In ecological succession, the second stage includes-

• ferns and grasses, followed by shrubs.

  Do you know where to find a good shrubber?

• tall trees and short animals

• short trees and tall animals

• sharks