Answer
Correct answer is :It has two elements
Explanation
A binary compound is a compound that is made up of two of the elements in the periodic table. Some examples of binary compounds are 
and 
. This means that a binary compound can have more than 2 atoms as in the case of hydrogen oxide. Some binary compounds are ionic as in the case of sodium chloride.This shows that they do not necessarily have to have covalent bonds. This also rules out the possibility that they may always have double bonds as ionic compounds are bound together by ionic bonds. The only thing that will always be true of binary compounds is that they will always have 2 elements.
The answer to finish this sentence would be ''the amount of genetic variation in a population'' because environmental factors can either increase or decrease a population.
The answer is sensory neurons
<span>
your answer is A
</span>Auxins hormones are used <span>used to </span><span>prevent premature fruit drop, so Ronald should spray the trees with this solution.
On the other hand, abscisic acid stimulated slows the </span>plant growth .
Very interesting problem!
On first reading, it sounded impossible. Tom has normal vision, and there are no male carriers for x-linked recessive disorders. So the daughter can at best (or worst) be carrier of the disorder.
We are told that the daughter has the disorder, but the daughter can only be a carrier with genotype XBXb.
We are also told that Turner Syndrome, which is a disorder related to the x-chromosome. Half of those affected have one of the x-chromosomes missing (monosomy), and some others have some cells with missing or deformed x-chromosomes (mosaicism). Under these circumstances where the normal chromosome is missing, the X-linked recessive Xb allele will be expressed, hence even a carrier can express the red-green colour-blindness.
From the pedigree chart, we can deduce that the colour-blindness must be inherited from Jill, the mother. Tom with normal vision cannot be a carrier because X-linked recessive disorders do not have male carriers.
The daughter's colour-blindness is derived from two sources,
1. inherited Xb allele from mother Jill
2. Turner syndrome that allowed the single allele to express colour-blindness.
