The scratch test.
The scratch test is used by scientists and people who study rocks and minerals to determine the strength of the rock. They have the scratchers numbered one through ten and scratch the rock or mineral until the scratcher makes a mark in the mineral then they know the strength of the rock.
Answer:
Archaebacteria.
Eubacteria.
Protista.
Fungi.
Plants.
Animals.
Explanation:
I remember this when I did physical science in high school.
Explanation:
Fueron identificados por un estudio de un grupo de investigadores en Israel y su análisis indica que el Homosapiens ya vivía fuera de África hace 185.000 años, unos 80.000 años antes de lo que se pensaba.
Answer:
Amino acid
Explanation:
Because Amino acids consist of an amino group (NH2) , carboxylic group (COOH) and radical (R).
