Answer:
c. mid-adulthood
Explanation:
This stage of life when gray hairs become overwhelming in number and he has more gray hairs than brunette( brown hair) is called middle adulthood. Middle adulthood spans from 20 to 40 years of life which may be defined differently for different culture and country.
Robert is in his late mid adulthood somewhere near 40 at this age hair generally grow grey.
Answer:
3.)CATASTROPHISM
Explanation:
catastrophism suggested the features seen on the surface of earth such as mountains,were formed by large abrupt changes or catastrophes
Eukaryotes have a nucleus with a membrane, larger ribosomal subunits, usually reproduce sexually, and may not have a cell wall. Prokaryotes have no membrane around the nucleus, smaller ribosomal subunits, reproduce asexually, and do have cell walls.
They are constantly contributing to the scientific community and
improving it. There are always new things to be discovered and they are
constantly doing just that?
Answer:
Damage to the heart muscle
