Spring 9 week assessment review
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Spring 9 Week Assessment REVIEW. Which two species are more closely related? A. bears & raccoons or B. raccoons & badgers. Raccoons and badgers. Which species is the most closely related to the guinea pig?. squirrel. Which two species have the most characteristics in common?.

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Spring 9 Week Assessment REVIEW

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Spring 9 Week Assessment REVIEW


Which two species are more closely related?A. bears & raccoonsorB. raccoons & badgers

Raccoons and badgers


Which species is the most closely related to the guinea pig?

squirrel


Which two species have the most characteristics in common?

Chimpanzee and bonobo


Using the hierarchy of classification to the right, two species are the most similar if they belong to the same _________.

Genus


Human activities can cause certain species to become extinct, by affecting the species habitat or food supply.

Could species adapt to different surroundings and food over time?

Yes

  • What if the change in food or habitat happened very quickly?

No, adaptation takes time


Why is overfishing bad?

The fish can’t adapt fast enough


What is it about polar bears that makes it difficult for them to successfully adapt to habitat & food changes?

Low rate of reproduction.

They only have 1-2 cubs every three years.


When two species try to capture the same resources, what is it called?

competition

Which species according to natural selection will survive?

The species with the best adaptations, which give it an advantage. Survival of the fittest.


Pseudomonas aeruginosa, a common bacteria, fights off competitors by injecting them with toxic proteins using a needle like puncturing device…

Good competitor


If a bee eats nectar from flowers and pollinates the flowers at the same time, what type of relationship would it be?

Mutualism, they both get something good.


If desert bats pollinate cactus flowers, where do you think they get their food?

From the cactus!

What type of relationship is it?

Mutualism

Both get something good.


Which level provides the most energy?

3rd Consumer

Wolf

2nd Consumer

Raccoon

1st Consumer

Grasshopper

Grass

Producers


If there are 10 kilocalories of energy at the tertiary consumer level in a habitat, how many kilocalories would be at the producer level?

10 tertiary

100 secondary

1,000 primary

10,000 producer


In a habitat, horned toads eat ants and ants eat grass. What would happen if the number of horned toads increased?

The number of ants will decrease & the amount of grass will increase


What would happen if decomposers like earthworms were removed from an ecosystem?

The cycle will be disrupted and slowed


What trophic level of a food web would be the most damaging if it died out?

producers

Can you explain why?

All the energy in the system starts with the producers. All other levels would run out of food eventually.


What would happen if the bird population increased?

Grass

Grasshopper

Bird

Snake

The grasshoppers would decrease and the grass and snakes would increase


Fox

Cat

Mouse

Rabbit

Grass

Explain which animals would be affected if a disease killed out all the grass.

All would be affected because of lack of food.


What is an example of a herbivore?

Any organism that eats producers. Deer, Rabbit, Mouse etc…..

What are 2 synonyms for producer?

utotrophs

A

P

lants

or


Which level contains the herbivores?

Grass

Grasshopper

Bird

Snake


Where do herbivores get their energy?

Producers


How much energy is passed to the next level?

What happens to the other 90%?

10%

Used by the organisms at that level & given off as heat


Is there a limit to the number of trophic levels in a food chain?

Why?

Yes

Most energy is given off as heat


In the nitrogen cycle, what organisms that live in soil and on roots fix or make usable by plants the greatest amount of nitrogen?

Bacteria fix the most nitrogen.

Are bacteria biotic or abiotic?

Biotic (living)


What happens to dead animal tissue in an ecosystem?

Becomes nutrients for other organisms


How are viruses and prokaryotes different?

A virus does not replicate on its own, but prokaryotic cells do replicate on their own.


How do vaccines work?

They induce the body to recognize the pathogen as foreign.


What does AIDs do to a person’s immune system?

Weakens it


What type of cells does HIV attack?

T-lymphocytes


How can a scientist distinguish between virus and bacteria?

A virus attacks the cell’s genetic material, while bacteria use toxins to kill a cell.


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