You applied the 3D effect of the organic arrows well enough, but your lines are not very confident and I could see that you tried to do it again by drawing over the mistake. The problem is that the attempted fix just made me more aware of its existence. It is better to leave the problem alone or else the line weight from fixing it would be heavier than the others and become more noticeable. Other than that, it looks like you didn't prepare enough via ghosting which led you to doubt yourself and resulted in wobbly lines. Remember, an inaccurate but confident line is preferable than wobbly ones. You would want the arrows to look solid in this exercise. The mistake is also noticeable in your hatching. You did the gradual increase in spacing, but like the other lines, it's too wobbly. Your organic forms has good form and ellipses are well angled, but just like the previous exercise, your linework did a lot to make the issues more noticeable than the good job you did in making it look 3D.

Your textures could use some work. Instead of drawing the detail's form, try to draw the shadows that the details make. Refer to your peanut dissection, its texture consists of more than the little bumps. It also has shadows formed between each bump which may vary depending on the position of the light source. If done correctly, then the cast shadows you draw will make the details look clear.

Your form intersections looks good, I could see that you exercised the concept of combining shapes, but try to fill the page so that you could get as much practice as possible with each page. Your organic intersections showed form and the softness of the blobs, but it could be a bit more flexible with the way they bend so than they will look more lifelike such as the middle blob in your first page of organic intersections. Just like I said, you need to work on your line work. I could see that you did well when it comes to shapes in 3D space. You just need more work in how you bring it to life.