Unit 1 Learning Check

An important difference between viruses and living cells is that viruses:

• contain more nuclei than cells
• need an energy source but cells do not
• cannot reproduce outside of cells
• cannot mutate but cells can

During a biology class, Aria and Benjamin were discussing what characteristic all living things share. What did they conclude?

• They all contain a nucleus

• They reproduce by mitosis

• They need oxygen to survive

• They contain DNA

What is an organism called when it is unable to produce its own food and must find an external source?

• Heterotroph
• Autotroph
• Eukaryote
• Prokaryote

What species is bird C?

• Dunliin
• Osprey
• Bald Eagle
• Baird's Sparrow

Which taxa has more organisms, family or phylum?

• phylum
• family
• they are equal
• not enough information to answer

In a controlled experiment, how many variables can be worked with at a time?

• one

• none

• two or more

• how ever many makes sense.

The part of the experiment that remains the same for the control and experimental group.

• constants

• control

• independent

• dependent

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the dependent variable?

• Dropping the same way

• Wing Length

• Amount of time it takes the helicopter to hit the floor

• Dropping from the same height

Ben makes five paper helicopters with different wing lengths. He drops them the same way from a height of two meters for five trials each. He records the amount of time it takes for each helicopter to fall to the ground.

What is the independent variable?

• Dropping the same way

• Wing Length

• Amount of time it takes the helicopter to hit the floor

• Dropping from the same height

Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed two tomato plants in 10 inch pots with potting soil and watered them ¼ cup each day. One plant was placed under a cardboard box and one was placed in the sunlight. She measured the growth of the plant each week for three weeks.

What are two CONSTANTS? (Select 2)

• Using the same type of plant

• Each plant was placed in a 10 inch pot

• The growth of the plant

• One plant is in the sunlight and the other is under a box