A labeled diagram of a fiddler crab is provided. Which of the following is an accurate observation of the structures of a fiddler crab? Fiddler crabs have -

a pair of eyes on stalks at the top of the body.

five pairs of walking legs on each side.

an enlarged propodus on both front legs.

two pairs or chelipeds for a total of four.

The diagram is intended to show relationships in an ecosystem. What do the arrows represent?

The direction of the energy flow

The direction of population migration

Progressively smaller organisms

The diagram represents a model of a food pyramid. Which statement best describes what happens in this food pyramid?

Energy is lost to the environment at each level, so less mass can be supported at each higher level.

More organisms die at higher levels than at lower levels, resulting in less mass at higher levels.

When organisms die at higher levels, their remains sink to lower levels, increasing the mass of lower levels.

Organisms decay at each level, and thus less mass can be supported at higher levels

A scientist collected data in a certain field which is shown in the diagram. He observed that these numbers remained stable over a period of time. He then introduced a large omnivore into the ecosystem. Assuming that the large omnivore was placed here by the scientist, which result can best be inferred?

A large omnivore would consume energy at every trophic level, reducing the amount of energy available to each level above the producers

The birds would not be affected because they are at the top of the pyramid

A large omnivore would consume energy only at the first two trophic levels and the 3rd and 4th levels would be unaffected

The omnivore had little affect because the birds would eat the omnivore’s offspring and the omnivore would die off

An example of a physical adaptation is...

a turtle hiding inside its shell

Which adaptation (for the underlined animal) serves the function of defense?

A porcupine’s quills cause a predator to seek another meal.

A walking stick looks like the twig on which it rests.

A whale filters plankton and krill from the water in which it swims.

A penguin is dark on top and white below to blend in with the water.

Why are advantageous traits more likely to be passed onto offspring?

Because they are more likely to survive and reproduce.

Because they come from dominant alleles.

Because they come from recessive alleles.

Because the trait is an acquired phenotype.

When a particular environment of a species undergoes an unfavorable drastic change, what might happen to this species?

It may not be able to adapt and may become extinct.

It may not be able to adapt and its numbers may increase

It will adapt and its numbers will decrease

It more than likely will not be affected by the environmental change.

Which of the following is a physical adaptation for the underlined animal?

A snake unhinges its jaw to eat a rabbit it just caught.

A hognose snake rolls over, slows its breathing, and hangs its tongue out to pretend to be dead.

A herd of buffalo encircle their young to protect them from a pack of wolves.

A dung beetle rolls a piece of dung across the desert.

Which statement does not accurately describe natural selection?

Individual organisms change their genes to adapt to their environment

The genetic composition of a population changes from one generation to the next

More advantageous traits become more common in population

Beneficial and useful traits are inheritable

Unit 5-6 CBA Review

Authored by Jessie Cramer

Biology

6th - 8th Grade

33 Questions

NGSS covered

Used 5+ times

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MULTIPLE CHOICE QUESTION

1 min • 1 pt

Survival of the Fittest and Evolution were proposed by what scientist?

Charles Darwin

Albert Einstein

Steven Hawking

Isaac Newton

Tags

NGSS.MS-LS4-4

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

Variation

Adaptation

Behavior

Environment

Tags

NGSS.MS-LS4-4

MULTIPLE CHOICE QUESTION

20 sec • 1 pt

Where the better adapted organisms survive to pass traits along to offspring.

Evolution

Natural Selection

Extinction

Artifical Selection

Tags

NGSS.MS-LS4-4

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The differences among a species, like different bird beaks, are called

genes.

variations.

traits.

theories.

Tags

CCSS.RI.5.5

CCSS.RI.6.5

CCSS.RI.7.5

CCSS.RI.8.5

CCSS.RI.9-10.5

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

All these birds are finches but they have developed different beaks due to the type of foods available to them, this is because of

Natural Selection

Selective Breeding

Tags

NGSS.MS-LS4-4

NGSS.MS-LS4-2

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

What process is being shown in this image?

Selective Breeding

Natural Selection

Tags

NGSS.MS-LS4-4

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

A farmer has bred his pineapple plants from the sweetest pineapples from his last harvest to get even sweeter pineapple plants. What is this an example of?

Selective breeding

Natural selection

Tags

NGSS.MS-LS4-5

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Unit 5-6 CBA Review

Survival of the Fittest and Evolution were proposed by what scientist?

Behavioral changes of individuals of a species that allow for better survival. (Acquired traits)

Where the better adapted organisms survive to pass traits along to offspring.

The differences among a species, like different bird beaks, are called

All these birds are finches but they have developed different beaks due to the type of foods available to them, this is because of

What process is being shown in this image?

A farmer has bred his pineapple plants from the sweetest pineapples from his last harvest to get even sweeter pineapple plants. What is this an example of?

Evidence shows that the wolf is the ancestor to all of the breeds of dogs shown below. How did this variation arise in a relatively short period of time?

A dichotomous key for trees is provided. Hikers found a tree that has large brown cones and single sharp needles. What species of tree have the hikers found?

A dichotomous key for insects is given. To what order does an insect with two pairs of scaly wings belong?

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