Cabinet
- Member's benefits
  - Create study meterials
  - Subscribe for quizzes
  - Practice in Flashcards mode
  - Practice in Quiz mode
  - Track your progress and identify weak spots
  - Add explanations
  - Discuss topics with others
  - Create and join study groups
  - Have fun and connect with friends!
  Sign In
  Sign in Register
Discover
- Study materials
- Study groups
Announcements
Practice
- Please sign in to practice

0% Score

What is classified by the A B O system?

Blood

Skin Colour

Fingerprints

Genetics

0 explanations

Explanations are useful to guide through learning process and confirm that the correct answer is indeed correct.

Only registered users can add explanations

Similar questions:

No similar questions.