Levels of Org & Symbiosis

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

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

Foraging honey bees collect pollen from plants and transport it to the beehive, where it's stored and used as food for the colony. Bees help flowers by transferring pollen between flowering plants. Which best describes this relationship?

• Parasitism

• Mutualism

• Predation

• Commensalism

Birds live in the hollows of trees. Their presence does no harm to the tree, but the tree provides the bird with shelter and protection.

• Parasitism

• Mutualism

• Competition

• Commensalism

Which of the following correctly gives the levels of organization from smallest to largest?

• Population, community, ecosystem, biosphere, biome

• Organelle, cell, tissue, organ, organ system, organism

• Population, community, ecosystem, organism, organ system

• Cell, tissue, organ, organelle, organ system, organism, population