Dichotomous Keys

What is the primary purpose of a dichotomous key?

• To measure the size of organisms

• To identify organisms based on a series of paired statements

• To determine the age of organisms

• To classify organisms by their common names

What is a characteristic feature of scientific names?

• They change based on the organism's location

• They are based on the organism's common name

• They have roots in Latin or Greek and are used internationally

• They are always in English

Why are scientific names preferred over common names?

• They are always shorter

• They are consistent across different languages and locations

• They provide more detailed information

• They are easier to remember

What does the presence of a nucleus indicate about an organism?

• It is a eukaryote

• It is a prokaryote

• It is an autotroph

• It is a heterotroph

What does it mean if an organism is an autotroph?

• It is multicellular

• It relies on other organisms for food

• It can move from one place to another

• It makes its own food, typically through photosynthesis

Tags

NGSS.MS-LS1-6

How can you tell if an organism is unicellular or multicellular based on the dichotomous key?

• By its ability to move

• By its size in micrometers

• By whether it can be seen without a microscope

• By the presence of a nucleus

Tags

NGSS.MS-LS1-1

What is the common name for the plant identified in the video?

• Rose

• Cactus

• Fern

• Spider plant

Why is it important to start with #1 on the dichotomous key for every organism?

• To ensure the accuracy of identification

• Because it's the easiest step

• To save time

• To avoid using a microscope

What challenge is presented when adding a new organism, like a cat, to the dichotomous key?

• Deciding if it's unicellular or multicellular

• The key may not work correctly without modifications

• Determining if it's an autotroph or heterotroph

• Finding a common name

What is essential when making a dichotomous key?

• Access to a laboratory

• Having a detailed knowledge of genetics

• Using observable characteristics

• Including habitat information