Unit 4B Pt2

Unit 4B Pt2
Dichotomous Keys,
Phylogenetic Trees & Cladograms


Standards: HS-LS2-1, 2, 6, & 7)

Multiple Choice

The science of describing, classifying, and naming living things is called:

• Geology
• Biology
• Taxonomy
• Chemistry

Multiple Choice

Which taxonomic level is broadest and includes the most organisms per group?

• Domain
• Phylum
• Family
• Species

Multiple Choice

The 8 levels of classification, broadest to most specific are....

• Domain, Genus, Family, Order, Class, Phylum, Kingdom, Species
• Domain, Species, Kingdom, Genus, Phylum, Family, Class, Order
• Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
• Order, Kingdom, Species, Domain, Phylum, Family, Class, Genus

Multiple Choice

The scientific name for an organism is made from the:

• class and family name
• genus and species name
• domain and kingdom name
• kingdom and phylum name

Multiple Choice

When using a dichotomous key to identify organisms, what do we look at?

• physical features
• weather patterns
• environment
• diet

Multiple Choice

This diagram shows a phylogenetic tree of six species based on amino acid similarities.

Which two species are the least closely related?

• V and VI

• III and IV

• I and VI

• II and III

Multiple Choice

A scientist sees the organism shown to the right in an aquarium and uses a key to help classify the species.Based on the key what species did the scientist observe?

• Aulostomus

• Gymnothorax

• Bothus

• Aetobatus

Multiple Choice

What is the purpose of using a dichotomous key?

• to identify organism

• to determine the evolutionary relationship between two organisms

• to locate the environment for each species

• to create a new kingdom

Multiple Choice

According to this phylogenetic tree, which creature is the least related out of all pictured?

• Fish

• Frog

• Salamander

• Human

Multiple Choice

All the animals to the right of the salamander would have the common characteristic of...

• Fur

• Claws or nails

• Lungs

• Jaws

Multiple Choice

Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

Multiple Choice

Which group of animals on this tree are most closely related to birds?

• Saurischian dinosaurs

• Ornithischian dinosaurs

• Crocodiles

• None of these are related to birds

Multiple Choice

On the cladogram, which organism is the closest relative of the parrot?

• Frog

• Hare

• Caiman

• Parrot

Multiple Choice

Which organisms from this cladogram are more closely related lizard and salamander OR Lizard and Mouse?

• Lizard and Salamander

• Lizard and Mouse

Multiple Choice

An illustration and a dichotomous key are given. What is the correct classification for this organism?

• Class Insecta
• Order Amblygygi
• Order Araneae
• Order Scorpiones

Multiple Choice

Two organisms that are closely related would have

• very similar DNA sequence
• exactly the same DNA sequences
• no proteins in common
• completely different DNA sequence

Multiple Choice

According to the cladogram, which of the following is NOT a derived characteristic?

• light bones

• Allosaurus

• down feathers

• 3-toed foot; wishbone

Multiple Choice

Which two groups of organisms have the MOST genetic DIFFERENCES?

• rotifers and nematodes

• mollusks and annelids

• mollusks and arthropods

• echinoderms and chordates

Multiple Choice

The diagram shows a cladogram of six species based on amino acid similarities. Which two species are MOST CLOSELY related.

• I and II

• II and IV

• I and V

• V and VI

Multiple Choice

What is a dichotomous key used for in science?

• To organize biomes

• Classify organisms

• Identify bacteria only

• None of these

​Let's give our podium winners a round of applause!