Sponge embryos develop ectoderm, endoderm, and mesoderm like other animal.
a. true
b. false

b. false

Explanation:

Sponges are simple multicellular organisms without forming tissues but have an aggregate cellular level of body organization. They are included in the phylum Porifera, meaning they are pore bearing organisms. Sponges are acoelomate animals but have spongocoel. The sponges are diploblastic, animals derived from two embryonic germ layers; ectoderm and endoderm.  The outer dermal layer and inner gastral layer. In between these two layers, there is a gelatinous and non-cellular mesoglea containing numerous free amoeboid cells.

its the cell wall and the they are unique to plant

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.