Answer please whoever answer & explain first gets brainliest. a protein that speeds up a chemical reaction is --

a) enzyme
b) peptide bond
c) isomer
d) polymer

Enzyme.

Enzymes are protein catalysts that are produced by living plants and animals. They help speed up many biological reactions like the conversion of urea to ammonia and starch to maltose.

Peptide bonds, isomers and polymers aren't the correct answers as they are neither proteins nor do they speed up chemical reactions. They are purely structural terms.

Hope this helps :D

the animal shelter ad with animals in cages, starving and dying.

explanation:

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.