Tutor and Freelance Writer. Science Teacher and Lover of Essays. Article last reviewed: 2022 | St. Rosemary Institution © 2010-2023 | Creative Commons 4.0

Eating Disorder: Anorexia Nervosa

Definition An eating disorder characterized by the refusal or inability to eat which creates a state of self-starvation. Characteristics Victims have a severe distortion of body image and extreme concern about appearances.  Use voluntary starvation, excessive exercise and diet pills to try and achieve idealized body proportions. Have an obsession with food and calories. Physical…

Tips for Staying Healthy: Losing Fat & Gaining Muscle

Practice Healthy Eating Habits One of the good points about many of the popular low carbohydrate diets is that they draw attention to the quality of the carbohydrates that we’re eating. Most Americans are choosing lots of refined, sugary, calorie-rich (but nutrient-poor) carbohydrates like soda, candy, white bread products, white rice, and processed french fried…

What is a foodborne illness?

Foodborne illness, often called ‘food poisoning’, occurs when a person gets sick by eating food that has been contaminated with bacteria, parasites or viruses, also known as ‘microbes’ and ‘pathogens’.  Foodborne illness is the largest class of emerging infectious diseases.  This is due to the changing population demographics, changing patterns of food production and consumption…

Foundations to 600 CE Trade Routes and their Connections

Route: Indian Ocean Advantages: Changeable, predictable monsoon wids lead to reliable schedules; great variety and amound of goods can be carried via ship (emporium trading); seaborne trade usually faster than land routes Geographical Scope: East Africa, Arabia, Inida, S.E. Asia; canal between Red Sea and Nile would eventually connect Mediterranean Commerce: Aromatic (incense), spices, gold,…

Political and State Power in Great River Valley Societies

State Leader & Symbolic Role Method of Unification Ruler’s Means of Control Egypt Pharoh (herdsman) sometimes functions as god. Organizing labor to manage floods; distribution of food; use of Nile River as highway to unify, control. Pharaoh’s commands, policies function as law, regarded as devine. Mesopotamia city-states King/Royals, mediate, lead, worship, receive oracles. Organizing labor;…

Biotic Relationships: Commensalism, Niche, Parasitism

Niche An organism’s ecological ROLE in the environment (NOT HABITAT!) All components of lifestyle and how they affect other organisms Three Types of Symbiosis Mutualism both species benefit Commensalism one species benefits, the other is unaffected Parasitism one species benefits, the other is harmed Lichen Lichen is really two organisms: algae and fungus. The fungus…

KINGDOM ANIMALIA: General Characteristics of Animals

Characteristics of Life Living things are organized. Living things are made up of cells. Living things metabolize. Living things maintain an internal environment. Living things grow. Living things respond. Living things reproduce. Living things evolve. Seven Levels of Taxonomic Classification Kingdom Phylum Class Order Family Genus Species Kingdom Animalia Characteristics All animals are multicellular, eukaryotic…

Kingdom: Fungi Characteristics & Structure

Mycology Myco- = fungus -ology= study of General Characteristics of Fungi: Eukaryotic Decomposers – the best recyclers around No chlorophyll – non-photosynthetic Most multicellular (hyphae) – some unicellular (yeast) Non-motile Cell walls made of chitin (kite-in) instead of cellulose like that of a plant Are more related to animals than the plant kingdom Lack true…

Phylum Arthropoda, Echinodermata, Chordata

The largest animal phylum- 1 million species of crabs, shrimp, spiders, scorpions, and insects make up this phylum Have jointed appendages; segmented bodies Exoskeletons made of chitin Molt;  have heads with many sensory organs. Bilateral Simple and complex eyes that detect only light intensity and form images Antennae that smell chemical substances in the environment…