Because the parents hereditary genes are different. As the child is made, the parents genes combine causing a mix of the way the parents look
Answer: Water covers 70% of the earth, so land covers 30%.
Answer:
The correct answer is option C. "Most rocks from that era are deeply buried".
Explanation:
The Precambrian is the earliest era of Earth's history, predating the emergence of life during the Cambrian Period. Even tough it is the earliest era of Earth, the Precambrian era represents 88% of all geological time, which makes evident that life is relatively new in comparison to the Earth's total geological time. Most rocks from Precambrian era are deeply buried, result of diverse phenomena in the tectonic plates along history. This make most rocks inaccessible and prevents the finding of Precambrian fossils.
Answer;
Chlorine is an element while carbon (iv) oxide is a compound.
Explanation;
-An element is a pure substances that is made up of similar types of atoms. Elements unlike compounds can not be divided into simpler forms using chemical means. Examples of elements include; potassium, chlorine, helium, sodium, etc.
-Compounds on other hand are substances that contain more than one atom from different element that are combined together chemically. The atoms in a compound are in a fixed ratio. Compounds can be divided into simpler forms using chemical means. Example of compounds include; carbon (iv) oxide, water, etc.
