Expliquer les differents roles joues par les micro-organises qui colonisent l'intestin humain

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Which of the following explains why a tree is often used as a model to represent the principle of common descent