According to Lamarck, the characteristics of organisms changed
because of:
extinction of competitors
a desire or need for that trait
special acts of creation
genetic mutation
chance

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

What is a sex-linked genetic disorder that disrupts the blood's ability to clot? a.achondroplasia b.huntington's disease c.hemophilia d.albinism