what is a cell classified as?

a basic unit of structure and function of all living organisms

a unit based on only plants and animals that are living

There are three parts to the cell theory. Which is NOT one of those parts?

Cells spontaneously arise from carbon and nutrients carried in the bloodstream.

All organisms are composed of one or more cells.

The cell is the basic unit of structure and organization in organisms.

All cells come from pre-existing cells.

Which of the following is a sample of active transport?

plant root absorbing mineral ions from the soil

movement of oxygen from alveoli into red blood cell

movement of water across cell membrane

uptake of water by the root hair of the plant

Which of the following is a sample of osmosis?

plant root absorbing water from the soil

plant root absorbing mineral ions from the soil

the scent from a bunch of flowers spreads throughout a room

carbon dioxide move from air into leaves through stomata.

Which one is the definition of Diffusion ?

net movement of molecule from a region of higher concentration to region of lower concentration . Molecule down a concentration gradient

movement of particles through the cell membrane from a region of lower concentration to a region of higher concentration using energy in the form of ATP.

passage of water molecules from a region of their higher concentration to a region of their lower concentration through a partially permeable membrane

net movement of molecule from a region of lower concentration to region of higher concentration . Molecule down a concentration gradient

Which is true about active transport?

It moves substances down the concentration gradient

it moves material from high to low concentration

The cell membrane is semi-permable, which means what?

certain things can pass through

the concentration levels are different

The process by which organisms maintain a relatively stable internal environment

The process by which organisms change their internal environment

The process by which organisms adapt to their external environment

The process by which organisms evolve over time

A Negative Feedback Loop is...

A process that counteracts a system's output

A process that reinforces a system's output

A process that has no effect on a system's output

A process that amplifies a system's output

A Positive Feedback loop is...

A system where the output enhances the original stimulus

A system where the output suppresses the original stimulus

A system where the output has no effect on the original stimulus

A system where the output reverses the original stimulus

During Homeostasis...

The sensor sends a message to the control center

The sensor sends a message to the effector

The effector sends a message to the control center

The control center sends a message to the sensor

Negative feedback loops

Correct an imbalance in the opposite direction

Have negative effects on the body

Smalls Biology Unit 2 Pre-test Quiz

45 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

When you step out into the cold, your body shivers in order to keep its temperature at 98.6F. Which characteristic of life does this represent?

All living things use energy

All living things contain cells

All living things maintain homeostasis

All living things grow

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Rocks are not living because

they never move

they aren't needed for humans

they are not made of cells

they don't break down

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A camel has eyelashes that work to keep the dust and sand out of its eyes. Which characteristic of life does this represent?

All living things adapt to their environment

All living things grow

All living things have cells

All living things use energy

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement describes ALL living things?

They are composed of one or more cells.

They must reproduce sexually.

They have organ systems to carry out the processes of life.

They are capable of making their own food.

A baby song bird hatches from its egg with both parent songbirds watching. Which characteristic of life does this represent?

All living things reproduce

All living things maintain homeostasis

All living things use energy

All living things grow

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which characteristic is shown: A plant switches position and follows the sunlight throughout the day.

Grow and develop

Respond to a stimulus

Acquire and use energy

Reproduce

Which of these is not true about all organisms?

all living things are multicellular

all living things obtain and use energy

all living things reproduce

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Smalls Biology Unit 2 Pre-test

When you step out into the cold, your body shivers in order to keep its temperature at 98.6F. Which characteristic of life does this represent?

Rocks are not living because

A camel has eyelashes that work to keep the dust and sand out of its eyes. Which characteristic of life does this represent?

Which statement describes ALL living things?

A baby song bird hatches from its egg with both parent songbirds watching. Which characteristic of life does this represent?

Which characteristic is shown: A plant switches position and follows the sunlight throughout the day.

Which of these is not true about all organisms?

What tool do you use to view the cells?

All living things are made up of...

All cells come from___________ cells.

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