Hi there, I noticed your submission and figured I'd take a look:

Organics. I think your arrows have really good construction and variety here. You could stand to push the dimensionality of your arrows more, however,. Remember that we're looking through a pane into a space rather than a flat page. Don't be afraid to throw your arrows farther or closer in that space.

Your forms are okay. I found two particular issues to address. The exercise recommends keeping your forms evenly shaped throughout(see here https://d15v304a6xpq4b.cloudfront.net/lesson_images/0128c0e3.jpg). The other thing that caught my eye is that the ellipses in these forms are of the same degree. Since we're looking at something three dimensional, the angle at which we observe the form is going to affect the degree of the ellipse(https://d15v304a6xpq4b.cloudfront.net/lesson_images/6822fd02.jpg). That said, they're still well constructed, so keep this in mind going forward.

Textures. This is a tough one. What we strive for in this exercise is implicit texture through the use of cast shadows. Much of the detail here looks like form shading and that falls outside of the scope of DAB. When we look at a texture, we're posing a light source at a position of our choosing and striving to capture the shadows projected by the reliefs of the surface, if that makes sense.

Much of this applies to your dissections as well. Closed forms are too be avoided, to the best of our ability at least, unless they create part of the silhouette and thus contribute to our understanding of the texture.

Intersections. Now this section looks like you have a good understanding of how forms come together. I don't have many thoughts here, but I do think you want to avoid errant marks, like some of those elliptical shadows on the organic intersection pages. The darkened sections of the form intersections should also be hatched with the same rigor as the 250 box challenge and lesson 1, with straight lines crossing through the plane with confident accuracy.