Over a million students use our free study notes to help them with their homework
Multipotent stem cells --> haematopoeitic adult stem cells
Sexual reproduction has many evolutionary advantages. These include: (1) a genetic variation in offspring that is not seen with asexual reproduction. (2) The variation allows the species<...
Gas exchange surfaces tend to have the adaptation a large SA:volume ratio. This is advantageous as it increases the area over which gases and other materials can be transported into and out of the organis...
Nerve impulses are propagated in the form of action potentials, involving the rapid depolarisation of the nerve cell membrane from -70mV to +30mV, before repolarisation occurs returning the membrane pote...
Second messengers are used in the downstream signalling cascade of protein hormones. As these hormones are hydrophilic, they can't cross the phospholipid bilayer. Therefore, when binding to a specific rec...
←
489
490
491
492
493
→
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
