Quiz 2

Question 1

Why is diversity important?

Answer 1

• for the health of the biosphere
• the more diverse the ecosystem is the greater its stability
• provides many options and alternatives
• there are 30 million species of insects alone

Question 2

Why do we classify?

Answer 2

• To understand the diversity of living things
• To help group things in an organized way
• Provides specific details to help identify organisms

Question 3

What does taxonomy mean?

Answer 3

• To help identify organisms

- to represent relationships between organisms.

Question 4

Early Taxonomy

Answer 4

Aristotle proposed that living organisms be arranged in hierarchical order.

Simple organisms at the bottom and advanced organisms at the top.

Question 5

Who was Carl Linnaeus

Answer 5

System based on physical and structural features

Believed that the more features that are common between two organisms the closer they are related.

Question 6

How are living things classified

Answer 6

Based on hierarchy of groups
called taxa (plural) or taxon (singular)

Domains –> largest/ most general taxa

Species –> smallest taxa

Question 7

What is a taxonomist?

Answer 7

Someone who classifies

Question 8

What is the order of classification levels?

Answer 8

Kingdom
Phylum
Class
Order
Family
Genus
Species

Characteristics become more similar as you move down

The smaller the taxon the more similar the organisms are within it.

Question 9

What is an acronym that can be used to remember the order of classification levels?

Answer 9

King Philip’s Cat Ordered Fresh Greek Salad

Question 10

What are the different Kingdoms

Answer 10

Plantae
Animalia
Protista
Fungi
Archaebacteria

Question 11

How are organisms named?

Answer 11

Binomial Nomenclature

Used for naming organisms by two names referred to as the scientific name.

Originate from latin or greek words

Based on characteristics

Question 12

How do you use the binomial system?

Answer 12

Genus is the first part of the name
-refers to a group of organisms that are closely related and have similar characteristics

Species is the second part

• referes to a group of organisms that look alike and can interbreed in nature
• produces infertile offspring

Scientific name can also be written as the first letter of the genus followed by the species.

Question 13

How does a dichotomous key work?

Answer 13

go through a series o choices that lead to the identification

at each step two alternative choices are provided:

the choice made determines what step to go to next

this continues until the identification has been made

Question 14

What is a dichotomous key?

Answer 14

a device that can be used to easily identify an unknown organism

organisms are divided into smaller and smaller groups

only two choices can be presented at each level

Question 15

There are more than ___ types of cancer.

Answer 15

100

Question 16

Cancer occurs when either ___ or ____ _____ _____ are activated or inactivated

Answer 16

oncogenes (controls the cells ability to grow and reproduce)

tumor suppression genes (have the ability to stop cells from growing)

Question 17

There are no certain types of cancer

There are various elements of exposure that may contribute to the cause of cancer.

What types of elements are there?

Answer 17

exposures of chemicals

viruses such as HIV

HPV is also associated with cancer.

Question 18

Symptoms of cancer are wide spread

What is common for organs that are taken over by cancer cells?

Answer 18

the infected organ does not work properly

caused by the chemicals and hormones that the tumor produces.

Anti bodies kill healthy cells and affect the ability of organs to function

Question 19

How much faster will cancer rates increase by?

significant amount of cancer connected to weight are primarily female diseases.

Answer 19

6x times

obesity is the second most preventable cause of cancer