Over a million students use our free study notes to help them with their homework
Homeostasis is defined as the maintenance of a constant internal environment in the body.
An example of this would be the blood glucose level:
After a meal, a person's bloo...
Note: Keywords which are vital for marks will be highlighted in bold.
Within all populations, there is variation.
This is due to di...
Once a month, following ripening, a single egg is released from a woman's ovaries during the menstrual cycle, with the hope of fertilisation. During the act of sexual reproduction, the father's sperm i...
A gene is a section of DNA or RNA that codes for a protein. Alleles are different versions of the gene. For example, if a gene coding for a particular enzyme mutated, then there would be two alleles o...
Genes, chromosomes and DNA are three vital components of cells and many students often confuse them with each other.
DNA stands for Deoxyribose Nucleic Acid. DNA molecule...
←
387
388
389
390
391
→
Internet Safety
Payment Security
Cyber
Essentials
Comprehensive K-12 personalized learning
Immersive learning for 25 languages
Trusted tutors for 300 subjects
35,000 worksheets, games, and lesson plans
Adaptive learning for English vocabulary
Fast and accurate language certification
Essential reference for synonyms and antonyms
Comprehensive resource for word definitions and usage
Spanish-English dictionary, translator, and learning resources
French-English dictionary, translator, and learning
Diccionario ingles-espanol, traductor y sitio de apremdizaje
Fun educational games for kids
