Answer:
About 540 to 490 million years ago
Explanation:
The Cambrian is the first and oldest division of the Paleozoic era on the geologic time scale. The other periods in the Paleozoic are the ordovician, silurian, devonian, carboniferous and permian. At the permian a mass extinction occured.
The cambrian is marked with the evolution of lot of life and it is typified by the presence and dominance of trilobites.
Answer:
they are found outside the nucleus
Answer:
To make sure the genes are constantly being expressed
Explanation:
Answer:
Your weight would more than double
Explanation:
Jupiter has more gravity (2.4x) so your weight would be 2.4x what it normally is
What elements are always present in protein?
A. radium, boron, fluorine, and chlorine
B. mercury, iron, lead, and aluminum
C. carbon, hydrogen, oxygen, and nitrogen ( ✔ )
D. neon, argon, krypton, and copper
<h2><u>Explanation</u> : </h2>
Proteins are one of the primary constituents of living matter. They consist of long chains of amino acids, which are bonded together by peptide linkages and thus called polypeptides. There are about 20 amino acids, and the atoms most prevalent in these are carbon, hydrogen, oxygen, nitrogen, and sulphur.