Struggling with your prescribed literature?
Our Literature Study Guides provide insights and analysis of themes and characters and includes guidelines for writing your exam.
nutrients are obtained by digesting organic compounds that have to be acquired and ingested by the organism.
a non-membrane bound structure made of proteins and nucleic acids that occurs within the nucleus...
a connected network of vessels and glands, which carry lymph throughout the body.
substances that have a harmful effect on the environment and also on human health.
animals that lack a cavity between the digestive tract and the outer body wall.
a molecule that stores large amounts of energy that can be used for metabolic activity.