Body Systems
What organ system in animals is responsible for transporting nutrients, gases, and wastes throughout the body, and is uniquely characterized by a heart and a network of blood vessels?
Circulatory system
What plant organ absorbs water and minerals from the soil?
Root
What is the process by which different kinds of living organisms are thought to have developed from earlier forms during the history of the Earth?
Evolution
Which two systems collaborate to deliver oxygen to cells and remove carbon dioxide?
Respiratory and circulatory systems
What plant organ is involved in photosynthesis and gas exchange?
Leaf
What is the mechanism proposed by Charles Darwin for how evolution occurs?
Natural selection
When a person touches a hot stove and quickly pulls away, what system is responsible for the immediate response?
Nervous system
What part of a plant develops into a new plant?
Seed
What do we call a structure that has a similar structure in different species but may have different functions, suggesting common ancestry?
Homologous structure
After digestion, what system delivers absorbed nutrients to body tissues?
Circulatory system
If a plant cannot stand upright due to lack of support and transport, which organ is likely damaged?
Stem
What type of evidence for evolution includes similarities in DNA and protein sequences?
Molecular evidence
If a person suffers from frequent infections due to a low white blood cell count, what system is underperforming?
Immune system
If photosynthesis slows down due to reduced light absorption, which pigment-containing structure is likely malfunctioning?
Chloroplast
What is the process by which humans breed organisms for desired traits?
Artificial selection