Question

1. Kidneys contain millions of tiny filtering units called
A = urine
B =villi
C = perstalsis
D = nephrons
I think its C or D

2. Proteins are made up of substances called
A = amina acids
B = sugars
C = carbohydrates
D = starches
I think its carbohydrates

Please help last two questions

Answer 1

search number 2 on google

good luck..

Answer 2

From Google:

Each kidney has around a million tiny filters called nephrons.
Proteins are macromolecules formed by amino acids.

Answer 3

this website is no help.