Answer:
Neurulation of organogenesis is the last stage of human development. The gastrula stage forms three germ layers called ectoderm, mesoderm, and endoderm
Answer:
Zika virus and West Nile virus are the two pathogens which causes more diseases due to increase the population of mosquito.
Explanation:
Zika virus belongs to the family of Flaviviridae. Aedes mosquitoes which are active at day time are the carrier of this virus. West Nile virus is also spread through the bite of mosquito. The infected mosquito is the main cause of spreading of this disease. This virus is spreading too fast in the United States of America in the summer season where the population of mosquitoes increases.
A term for softening of the brain is tephromalacia.