Topics: Transportation and Excretion Quiz
___ opens and closes the stomata.
A. Guard cells
B. Xylem
C. Roots
D. Phloem
Select your answer:

Topics:
Human Body Systems Absorption, Lymphatic System, and Blood Vessels Tissue Repair Pathology Blood Typing Disease as a Failure of Homeostasis Blood Groups Somatotypes Factors Affecting Health Macronutrients & Micronutrients Sensory Disorder MEDICINE Haematology Vision & Hearing Vitamin Muscularskeletal SystemOther quiz:
Health-Wellness-Illness › View In the epidemiological triangle of the Agent-Host –Environmental Model, what is known to be the cause of the disease?
A. Agent
B. Host
C. Environment
Hospitality › View
What is it called when a person can’t obtain nutritious food?
A. Food security
B. Food poverty
C. Fairtrade
D. Organic