Unit 4 Biology Review Chapter 17 & 18 Worksheet

Type of protein that has no genetic material
Smaller than viruses (subviral)
When harmful bacteria, viruses, prions, or viroids infect another organism they become…
Conditions within an organism that prevent it from functioning normally
The body’s defense mechanism, responsible for protecting the body from foreign substances and diseases
The _______ of a disease are the side effects of the diseases progress.
Coughing that lasts for weeks
Swelling on the pads of chicken feet
Growths on the plants similar to cancer
High fever, headaches, muscle weakness in animals
High fever, headaches, sore throat, nasal congestion in humans
Yellow, light-green, or white spots on the leaves of plants
Memory problems, behavior changes, vision changes in humans
Strange behavior and trouble walking in animals
Yellow and curling leaves on tomato plants (viroids)
A scientist who studies diseases and their causes
Most bacterial & viral diseases result in the creation of_____ & ______
The removal of harmful bacteria from the skin is called
The process of __________ kills or removes all microorganisms from a surface