First of all, I'd like to compliment you on your linework which is quite consistently clean and confident throughout all of these exercises. This is as, far as I can see, a great submission that shows you are keeping the main points of the lesson in mind.

First of all, with your organic arrows these are overall great. For the most part, you are making sure to keep your lines confident as well as considering perspective as you narrow the widths of your arrows as they go further back in space. On future warmups, I would suggest maybe experimenting with slightly more variations on how your arrows are moving around through space.

For your organic forms with contours, these are overall pretty good. However, your organic forms are slightly too complex as there is some pinching and bloating towards the ends of some of these. Remember to imagine these as two spheres connected by a tube of consistent width. You are also doing a good job hooking your curves around your forms.

However, the main point that you should focus on is trying to vary the degrees of your ellipses more. Especially, with the curves. While we cannot see the full ellipses, there is still going to be a variation in how round the curve is if you simply imagine it as being a incomplete part of the ellipse that would be there if you could see through the whole form. Maybe take a look at these images (1) (2) as a refresher.

Your texture analyses are excellent. You've clearly been very patient and are aware of implicit texture. Nothing for me to critique here.

Your dissections are also on the right track. However, there are some places where I can see you've drawn the contour lines rather than implying it such as on the texture of the stone wall where you've drawn the full outline of the whole brick. I believe this is common with this exercise though because of the sheer amount of volume that has to be done.

For your form intersections, you're a doing a good job of placing lots and lots of forms to really push yourself to think how these forms can intersect. As far as I can tell, these are very good and this exercise is one to be continuously improved at anyway. However, I would say that some of the added line weight is a bit thicker and less subtle than I would like. Also remember that line weight should not usually be applied to the inner edges and corner of the box, rather its silhouette – unless the added line weight is being used to emphasize an intersection.

Finally, in terms of your organic form intersections, these are also good. On future attempts, just make sure to keep in mind the same points I made for your organic forms with contours. Also, I'll just quickly point out that it seems like the large organic form in the middle of this would cast a shadow over the organic form it is overlapping as well as the floor beneath it.

All in all, I'm impressed. Keep up the great work!