A compound is always a substance because it's made out of two or more atoms bonded together. Now a substance isn't always a compound because it takes two or more elements to create a compound in a chemical reaction, ans substances can contain only one element. In other words a substance can be constructed of one type of atom. Some substances that aren't compounds are: gold and baking soda.
Answer:
Why can a female only pass on an X chromosome to offspring?
It is an established fact that female has XX chromosomes while male has XY chromosomes, during fertilization both male and female donate one of the pairs to form a pair of allele for the offspring. The female donate an X chromosome since the two chromosomes in her possession is XX while the male donate either of the X or Y chromosome
Explanation:
Answer:
Radiation
Explanation:
Reflection and absorbtion by the atmosphere prevent some <u>radiation</u> from reaching Earth's surface.
I’m not 100% but I think it’s Scientific Law.
