4. D
5. C
6.C
Hope this helps :)
a) There are four kinds of coal depending on their carbon content. ⇒ False
b) Coal is usually found in liquid state. ⇒ False
c) Fossil fuels are the result of the descomposition of plants and animals from the past. ⇒ True
d) Petroleum is the cheapest source of energy.⇒ True
Since they both eat the same foods, their food supply is limited.
Cell, DNA, chromosome, gene
In order of decreased size
Answer: They can affect males or females
Explanation:
Male chromosomes: XY
Female chromosomes: XX
