12. A bacterial infection that affects the nervous system is .

13. Substances that burn or destroy tissue by chemical reaction are .

14. While trimming hooves, it is important to not cut the , which is the
soft growing part under the nail or outer hoof.

15. A method of shearing around the dock, crotch and udder before lambing
is .

12. Brain abscesses

13. Cytotoxic agents

Explanation:

I didn't really understand 14 and 15,

if you need an example of cytotoxic agent one of them is Hydrochloric acid which is one of the most common acids

Hope it helps.

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.