What does the carrying capacity of a population show?

The maximum number of organisms that an ecosystem can support

How many species live in the entire ecosystem

The minimum number of organisms that can live in an area

The types of organisms living somewhere

What is a population?

A group of the same species living in the same area at the same time

All the organisms living in an area

The living and non-living organisms in an area

What is an ecosystem?

All of the organisms living in an area and the non-living environment around them

All the organisms living in an area

A group of the same species living together

What happens if a population goes over its carrying capacity?

It will eventually decrease due to a lack of resources

It will get unlimited resources

What is a keystone species?

A species that helps to hold an ecosystem together

A species that lives in or around rocks

Keys and stones have nothing to do with ecology

A keystone isn't a living thing, it's just a stone

Trophic cascades refer to...

top-down impacts that reach beyond adjacent trophic levels.

top-down impacts that reach the adjacent trophic level.

bottom-up impacts that reach the top trophic level

What is a tropic cascade?

an ecological process triggered by the removal or addition of a top predator that causes changes throughout the food chain.

an ecological process triggered by the removal or addition of a top predator that causes no changes throughout the food chain.

an ecological process triggered by the removal or addition of a vegetation that causes no changes throughout the food chain.

How did the sea otters preference for hunting large sea urchins affect the phenotypic variation of the sea urchins over time?

The sea urchins became smaller.

There were less sea urchins in the population

The sea urchins became darker in color.

What happens if a population grows past its carrying capacity?

Resources will run out and individuals will start to die

The population keeps growing exponentially

The entire species will go extinct

The carrying capacity just increases

How does ocean acidification impact marine species, such as sea urchins?

It adds too much weight to their shells

It makes the water too warm for them

How do the particles move in diffusion?

From a region of high concentration to a region of low concentration

From a region of low concentration to a region of high concentration

From a region of low concentration to a region of low concentration

From a region of high concentration to a region of high concentration

What does a 'region with high concentration' mean?

An area with a LARGE number of particles

An area with a SMALL number of particles

An area with an UNEVEN number of particles

Why is diffusion so important in biology?

It allows substances to move across cell membranes

It's the basic energy source for most types of cells

It prevents toxins from entering our bodies

Selectively permeable means

some things can pass through, while others cannot

the concentration levels are different

"The __________ were putting selective pressure on the urchin population by eating mostly _________ urchins. Over time, the _______ urchins who survived pass on their alleles for being small, resulting in a population that had more _______ urchins than it did before the otters were present."

sea otters, large, small, small

sea otters, small, large, large

Why did the food coloring move into the egg in the acidic solution in the egg diffusion lab?

because the concentration of food coloring was lower inside the egg

because the concentration of food coloring was higher inside the egg

because the egg yolk was hydrophobic

What is a controlled experiment?

scientific test done under controlled conditions, meaning that just one (or a few) factors are changed at a time, while all others are kept constant

an experiment repeated and verified by many different scientists

making predictions about patterns that should be seen in nature using existing data

What is the main difference between a control group and an experimental group?

experimental group receives the independent variable treatment; control group does not

control group receives the independent variable treatment; experimental group does not

experimental group provides a baseline that lets us see if the treatment has an effect

there is no difference between the control and experimental groups

What is the main difference between the independent and dependent variable?

independent variable is manipulated (changed) in the experiment; dependent variable is what is measured to see if the treatment had an effect

the independent and dependent variables are the same thing

independent variable depends on the dependent variable

What are constants in an experiment?

factors that stay the same for the experimental and control groups

factors that are different between the experimental and control groups

factors that do not have an effect on the experiment

factors that make it difficult to obtain accurate results

What are the reactants (what's needed) for photosynthesis?

light, water, and carbon dioxide

What are the products (what's made) during photosynthesis?

water, light, and carbon dioxide

Sea Otter Unit Test Review

Authored by HOLLY DUNDERDALE

Science, Biology

10th Grade

NGSS covered

Used 24+ times

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59 questions

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MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is an Abiotic Factor?

A NON-living factor that can affect an ecosystem

A living factor that can affect an ecosystem

The carrying capacity of an ecosystem

Tags

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is a Biotic Factor?

The carrying capacity of an ecosystem

A NON-living factor that can affect an ecosystem

A living factor that can affect an ecosystem

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2

MULTIPLE SELECT QUESTION

15 mins • 1 pt

Check all of the boxes that show examples of biotic factors.

Rain

Humans hunting

Predators

Wildfire

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2

MULTIPLE SELECT QUESTION

15 mins • 1 pt

Check all of the boxes that are examples of abiotic factors.

Prey

Rainfall

A pack of wolves

A tornado

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-3

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

What is a limiting factor?

Factors that always increase a population

Factors/resources that limit how many organisms can live in an area at the same time

Resources that are unlimited

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

If there was a wildfire in the forest that destroyed the plant life, what would happen to the herbivore population?

Herbivores would decrease due to a lack of food

Herbivores would increase due to an increase of food

Herbivores would not be affected

Herbivores would decrease due to an increase in predators

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-1

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

If humans were to release a pack of wolves into the forest, what type of factor would this be?

Abiotic

Biotic

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2

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