Answer;
-Carbon
Explanation;
-Fossils are formed in a number of different ways, but most are formed when a plant or animal dies in a watery environment and is buried in mud and silt. They formed from organic remains of plants and animals that were converted into coal, oil or natural gas by exposure to heat and the pressure of the Earth’s crust over millions of years.
-Fossil fuels are hydrocarbons comprised primarily of the following elements: carbon and hydrogen and some sulfur, nitrogen, oxygen, and mineral matter. For example, Natural Gas and coal are made up of carbon, hydrogen, nitrogen, sulfur and oxygen. Oil, or petroleum, also consists of carbon, hydrogen, sulfur, oxygen and nitrogen, but it is in liquid form.
All cells have selectively permeable membranes, which means that only they let certain important molecules inside the cell, while the others stay outside the cell.
This occurs by the process of diffusion or osmosis.
A)test the effect of raising Ph on enzyme action
Answer:
The most recent common ancestor of all currently living organisms is the last universal ancestor, which lived about 3.9 billion years ago. ... 6,331 groups of genes common to all living animals have been identified; these may have arisen from a single common ancestor that lived 650 million years ago in the Precambrian.
