Levels of org/symbiosis

Cattle egrets forage (feed) in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not.

• mutualism
• commensalism
• competition
• parasitism

A relationship between two organisms in which one organism benefits, and the other is neither benefited or harmed

• Mutualism

• Competition

• Parasitsm

• Commensalism

A relationship between two organisms in which both organisms benefit

• Mutualism

• Competition

• Parasitsm

• Commensalism

Hookworms can enter the body of animals or even humans. The hookworm attaches to the lining of the intestinal wall and feeds on blood. Its eggs are ejected into the digestive tract and the larvae (young hookworms) that hatch live off of the host’s blood. The host can suffer from blood loss, anemia and iron deficiency.

• commensalism

• mutualism

• parasitism

• predation

• Parasitism
• Mutualism
• Commensalism
• Predation

Which of the following is the correct order of organization in living things from most basic (simple) to most complex?

• Organism, cell, tissue, organ, organ system

• Cell, tissue, organ, organ system, organism

• Organ system, organ, tissue, cell, organism

• Cell, organ, tissue, organ, organism, organ system

The smallest level of organization of life in an organism

• tissue

• organ

• cell

• organ system

A science class is planning a field trip to a local farm that has a large pond. Which of the following lists the order of biological organization from smallest to largest that the students can expect to find at the pond?

• Population, organism, community, ecosystem

• Organism, community, population, ecosystem

• Organism, population, community, ecosystem

• Population, organism, ecosystem, community

The human body is composed of organ systems. Which list represents a system organized from least to most complex?

• Heart --> cardiac muscle --> muscle tissue --> muscle cell

• Lung tissue --> trachea --> nostrils --> circulatory system

• Muscle cell --> muscle tissue --> biceps muscle --> muscular system

• Integumentary system --> skin cell --> hair --> sweat glands

Which of the following is an example of an organism?

• a skull bone

• a nerve cell

• mouse

• skin