) In what layer of an embryo would you expect blood vessels to first develop? (Unit test due in two hours!) The inner layer
The middle layer
The outer layer
All layers at the same time

embryonic mesoderm...

your answer is below. please mark it pls.

Explanation:

endoderm

One of the germ layers developed during animal embryogenesis is the endoderm. The inner layer of the gastrula, which grows into the endoderm, is formed by cells migrating inwards along the archenteron. It is the first layer that needs to be created

air, water, heat and noise pollution can all be caused by producing and using technology. consuming resources - non-renewable resources, including precious metals like gold, are used to make technology

segmentation=endoskeleton=backbone=coelom=tissues