Organisms are always interacting with their environments, either through exploiting the inorganic aspects of their surroundings, or with...

Vectors are organisms that carry pathogens on or in their bodies without the pathogen causing any harm to them. These vectors transmit ...

Your eyes are probably your most important sense organs. I mean, think about it: which of your 5 senses do you use the most? Definitely...

Disease refers to any condition that impairs the normal function of an organism's cells, tissues or organs that results in a decrease in...

Diffusion is the net movement of particles from an area of high concentration to an area of low concentration until they are evenly....

In the classification of living organisms (taxonomy), you probably remember that a species is the most specific taxon. Apart from being...

Cell specialization (also called cell differentiation) is the process by which generic unspecialized cells change into specific types of...

Osmoregulation is the process by which the balance of salt and water (osmotic pressure or water potential) is maintained across...

Cells are the most basic living component of an organism. According to cell theory/doctrine (it's not a theory anymore- it's kinda...

Each human has two kidneys which function as essential parts of the urinary system. Each kidney is separated into three regions, the cortex

It is impossible to discuss living things without mentioning excretion. Living organisms have several chemical reactions occurring within...

Do you think that you are the same person you were a month ago? You probably act the same, but the cells of your body are constantly...

Enzymes, as you know, catalyze chemical reactions by reducing the activation energy. In your digestive tract, special organs produce enzymes

Enzymes are biological catalysts which speed up the rate at which chemical reactions occur and can be recovered, unchanged after...

Digestion is the process by which the large, complex, insoluble food materials ingested are broken down by a series of mechanical...

Four main factors affect the rate of photosynthesis: light, water, carbon dioxide supply and temperature. If all of these factors are...

Nutrition can be described as the process by which living organisms obtain food and convert it into energy required for life.

The whole point of producing seeds is so that they can eventually find a suitable place to germinate and grow.

Plants have different needs in gaseous exchange than humans due to the fact that they photosynthesize.

Gaseous exchange is the physical process by which gases move by diffusion across a surface. (Remember that diffusion is the net movement...