Question 1

The human immunodeficiency virus targets:

Accepted Answer

A) lymph nodes. 
B) all white blood cells. 
C) helper T cells. 
D) bone marrow cells. 
A) lymph nodes. 
B) all white blood cells. 
C) helper T cells. 
D) bone marrow cells.

Question 2

The viral capsid is:

Accepted Answer

A) a fatty membrane surrounding the virus. 
B) the genetic material at the core. 
C) a protein coat around the genetic material. 
D) the viral offspring that rupture the cell and escape. 
A) a fatty membrane surrounding the virus. 
B) the genetic material at the core. 
C) a protein coat around the genetic material. 
D) the viral offspring that rupture the cell and escape.

Question 3

Scientists do not consider viruses to be alive because viruses cannot metabolize outside a host cell.

Accepted Answer

A) True 
 B)False

Question 4

Refer to the figure below, and then answer the following question(s).
  
-The missing label indicated by a "2" corresponds to the:

Accepted Answer

A) receptor. 
B) capsid. 
C) RNA. 
D) envelope. 
A) receptor. 
B) capsid. 
C) RNA. 
D) envelope.

Question 5

A protist such as Chlamydomonas may switch to sexual reproduction when:

Accepted Answer

A) there are numerous predators. 
B) there is little nutrition. 
C) a 90-day cycle is completed. 
D) hormones from nearby members of the species are detected. 
A) there are numerous predators. 
B) there is little nutrition. 
C) a 90-day cycle is completed. 
D) hormones from nearby members of the species are detected.

Question 6

Cilia are:

Accepted Answer

A) the cytoplasmic extensions or false feet that some cell types use for locomotion. 
B) different kinds of cells, each designed to perform a different function. 
C) the circular chromosomes of bacteria. 
D) many short, hair-like cellular extensions that beat to produce movement. 
A) the cytoplasmic extensions or false feet that some cell types use for locomotion. 
B) different kinds of cells, each designed to perform a different function. 
C) the circular chromosomes of bacteria. 
D) many short, hair-like cellular extensions that beat to produce movement.

Question 7

Overuse of antibiotics has likely produced MRSA.MRSA stands for ________.

Accepted Answer

methicilli

Question 8

Most protists are unicellular.

Accepted Answer

A) True 
 B)False

Exam 21: Viruses,bacteria,archaea,and Protists: the Diversity of Life 1

The human immunodeficiency virus targets:

The viral capsid is:

Scientists do not consider viruses to be alive because viruses cannot metabolize outside a host cell.

Refer to the figure below, and then answer the following question(s). -The missing label indicated by a "2" corresponds to the:

A protist such as Chlamydomonas may switch to sexual reproduction when:

Cilia are:

Overuse of antibiotics has likely produced MRSA.MRSA stands for ________.

Most protists are unicellular.

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late,traveling Far: the Evolution of Human Beings

Fungi: the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

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