Dichotomous Keys and Classification

Classification & Dichotomous Keys

Open Ended

Now you try. Click on the image and name it using the dichotomous key provided.

Multiple Choice

This diagram shows a cladogram of four species based on amino acid similarities.

Which two species are the most closely related?

• Bat and Lion

• Kangaroo and Bat

• Koala and Lion

• Koala and Bat

Dr. Tishcoff explains the phylogenetics of humans on the next slide.

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Poll

Are humans and apes different?

• YES

• NO

ANSWER:

At some point, possibly with Kenyanthropus platyops 3.5 million years ago, humans and apes diverged from a common denominator, and over time, this evolutionary circle has increased the divergence, resulting in human uniqueness.

Multiple Choice

The diagram below shows a phylogenetic tree for animals.

Which two groups of organisms have the most genetic differences?

• echinoderms and chordate

• rotifers and nematodes

• mollusks and annelids

• mollusks and arthropods

Multiple Choice

Which species is most closely related to species L?

• species E

• species F

• species G

• species I

Multiple Choice

Which kingdoms have photosynthetic organisms?

• fungi and plants

• fungi and protists

• protists and plants

• plants and animals

Multiple Choice

Some characteristics of a recently discovered organism are:

-Eucaryotic

-Multicellular

-Produces spores

-Can reproduce sexually and asexually

-Lacks chlorophyll

-non motile

Based on the given characteristics, this organism would be classified in which kingdom?

• eubacteria

• fungi

• plantae

• protista