The double layer of fibrous tissue surrounding the heart is the

What type of cell is produced after fertilization occurs and the gametes combines ?

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Explain how the political influence of african americans leaders became weaker.