What is the skeleton of an embryo mainly composed of?

What two fields of study provide the core information that is used to classify organisms?

20 points and brainlist 1. london has suffered from terrible air pollution for at least seven centuries. why is the city so prone to its famous “london fog? ” what did london do to get rid of its air pollution? 2. why does air pollution cause problems in developing nations more than in developed ones?

What is the genotype of the male circled in pink? ο χου lo xay xaya done answer was xay