Asked by Haley Evans on Jul 28, 2024
Verified
Which of the following organisms is lacking one of the five characteristics typically found in animals?
A) sponges, which have no true tissues but have two layers of cells that perform different functions
B) planaria, who have an incomplete digestive tract but do have muscles and excretory and reproductive systems
C) trypanosome, a single-celled organism that causes sleeping sickness in humans
D) leeches, segmented worms that are predatory on other animals
E) tapeworms, flatworms that infest the intestines of humans
Sleeping Sickness
A parasitic disease transmitted by the tsetse fly, characterized by fever, headaches, joint pains, and sleep disturbances.
Trypanosome
A genus of unicellular parasitic flagellate protozoa, some species of which cause diseases such as sleeping sickness in humans and animals.
Incomplete Digestive Tract
A type of digestive system where a single opening serves as both mouth and anus, common in simpler organisms like cnidarians and flatworms.
- Identify and describe the characteristics and life cycles of major phyla in the animal kingdom.
- Describe the structure and function of specialized tissues and systems within different animal groups.
Verified Answer
MG
Milos GrahovacAug 01, 2024
Final Answer :
C
Explanation :
Trypanosome is a single-celled organism, which means it lacks the complexity and organization into tissues that are typical of animals. The other options describe multicellular organisms with varying degrees of complexity and organ systems.
Learning Objectives
- Identify and describe the characteristics and life cycles of major phyla in the animal kingdom.
- Describe the structure and function of specialized tissues and systems within different animal groups.