Unit 7 Review (Part 2)

Unit 7 Review (Part 2)

​Bacteria & Archaea - unicellular prokaryotic organisms

Eukarya - unicellular and multicellular eukaryotic organisms

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Domains of Life

Multiple Choice

Which question is the basis for separating primitive life forms from advanced life forms during classification?

• Does the organism have distinct cells?

• Can cells in the organism reproduce?

• Is the organism single-celled or multicellular?

• Does the organism have specific cellular structures or functions?

Labelling

The three domains are shown in the chart. Place the characteristics that describe each domain under the correct domain name

Drag labels to their correct position on the image

unicellular

protists

Unicellular or multicellular

fungi

plants

extreme environments

disease causing

unicellular

animals

Multiple Choice

A sample of bacteria was added to a culture dish containing a food supply. The dish was kept in an incubator for two weeks, where temperature and other conditions that favored bacterial growth were kept constant. The graph shows changes that occurred in the bacterial population over the two weeks. Which statement provides the best explanation for some of the changes observed?

• The bacteria were unable to reproduce until day 8.

• The bacteria consumed all of the available food.

• The culture dish contained an antibiotic for the first five days.

• The temperature increased and the bacteria died

Used to organize living things into groups based on similarities and evolutionary relationships

Are adaptable if -

• new information if found

• new organisms are discovered

Systems of Classification

Multiple Choice

A taxonomic classification system is a tool that shows relationships among organisms. The system gives scientists a common language and logic that can be used to organize and classify all living things. When organisms are discovered that do not fit within the system, the system is modified to accommodate these new organisms. Which two words BEST describe a taxonomic classification system?

• rigid and formal

• flexible and informal

• formal and flexible

• informal and rigid

Multiple Choice

Tuataras are reptiles that are only found in New Zealand. They were originally classified as a type of lizard, but close examination of the tuataras' skull and body showed them to be quite distinct from lizards. In fact tuataras are related to a group of reptiles once thought to be long extinct. The following table shows how the tuataras have now been classified compared with other types of reptiles. How did this biological classification table change to accommodate the discovery of the tuataras' distinctive traits?

• The orders Squamata and Rhynchocephalia swapped places

• The orders Squamata and Rhynchocephalia were combined

• The order Rhynchocephalia was created

• The order Squamata was created

Multiple Choice

The periodic table changed in the late 1800s when noble gases were discovered. A new column was added because this new type of element did not belong in any of the other columns. Is this similar to what happens to the taxonomic system used in biology when a new organism is discovered?

• No, all newly discovered organisms are placed in existing taxonomic categories

• No, all newly discovered organisms are placed in a category based on their year of discovery

• Yes, when a newly discovered organism is classified, a new kingdom and phylum must be developed for it.

• Yes, when a newly discovered organism does not fit in an existing category, a new category must be developed to classify it

Multiple Choice

Taxonomy, the science of classifying living things, is based on related organisms having similar structures or patterns evident at some level of observation. The drawings represent organisms that are related. Which organizational pattern do the organisms share?

• body parts are segmented

• soft, thick, fleshy body

• two mirror-image body parts

• body parts arranged around a center

Multiple Choice

A scientist sees the organism pictured in an aquarium and uses a key to help classify the species. Based on the key, what species does the scientist observe? (Hint: The organism shown is "flat", so all parts seen in the image are on top of the organism)

• spotted moray eel

• spotted eagle ray

• glassy sweeper

• glasseye snapper

Multiple Choice

The diagram shows the evolutionary relationships between several groups of organisms. Organisms with the greatest biochemical similarities would most likely be found in which pair of genera? (the plural of genus is genera)

• 1 and 3

• 2 and 3

• 3 and 4

• 1 and 4

Koch's Postulates - used to show relationship between a microbe and a disease

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Multiple Choice

Robert Koch's research into diseases such as anthrax and cholera led him to develop his four postulates, which are shown in the table.

What was the purpose of the four postulates?

• to demonstrate that the pathogen is resistant to antibodies

• to confirm the identity of the pathogen that caused the illness

• to produce enough pathogens to generate an effective vaccine

• to show that the pathogen does not mutate in laboratory animals

Viruses consist mostly of genetic material and proteins

Not complex. Do not have cellular structures

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Virus structure

Labelling

Label the Image

Drag labels to their correct position on the image

Genetic material

Protein coat