Intro to Life and Experiments [21-22]

When designing an experiment, the independent variable is?

• The variable that YOU manipulate or change on purpose

• The variable that changes as a result of your experiment

• Not present in every experiment

• Described by the five senses, but not numbers

In any experiment, the dependent variable is?

• What you actually measure/record as a final result

• What changes because of the independent variable

• Both of the above are true

• None of the above are true

Which of the following is NOT quantitative data?

• Length of a seed

• Mass of a seed

• Volume of a seed

• Color of a seed

When designing an experiment, you must have a control group because...

• You need to record quantitative and qualitative data

• You need a baseline to compare to the experimental group

• Not all experiments need a control group actually

• You must have an extra group in case you mess up

Which of the following is true for cells?

• All living things are made of one or more cells

• Organisms may have trillions of cells

• Different cell types have different functions

• All of the above

The bottom of the energy pyramid in almost every ecosystem is...

• Bacteria which make their own energy

• Plants which get energy from the sun

• Animals that get energy from the sun

• Random depending on the location

Which of the following is true about gas exchange?

• All organisms breathe the exact same gases

• Plants take in CO2 and animals take in O2

• Plants take in O2 and animals take in CO2

• Only some organisms exchange gases to live

What is the major benefit of asexual reproduction?

• It leads to genetically diverse offspring

• It takes a lot of time and energy resources

• It needs two individuals to work properly

• It is fast and requires only one individual

What is the major benefit of sexual reproduction?

• It leads to genetically diverse offspring

• It is fast and does not require much energy

• It may lead to extinction

• It has no major benefit

The human embryo stages in the picture are demonstrating what characteristic of life?

• Growth

• Development

• Both

• Neither