Key system standing for the main system of the body
Answer:
the 2nd and 4th
Explanation:
they contain more than one molecule due to them being different elements
Answer:
assuming the
1.Cc represent creepers ( since creepers never breed true this is the likey representation,)
2. nn represents normal.
<u>If these are crossed</u> the F1 progeny are;
Cn and Cn= creeper
nc and nc = normal 50/50 % ratio.
<u>However. if the two creepers(Cn and Cn ) from above are self-crossed in the F2 to give two creepers and a normal progeny .T</u>he creeper traits is expected to be dominant; while the recessive to be lethal, The normal birds nn, is expected to be homozygous recessive for the trait .
Explanation:
Cant tell you the types, but they form from the weather elements, from being compressed, etc
The correct answer would be Fluoride was not used to help protect teeth then
Cavity is not a genetic disease and thus there is no relevance of gene transfer in this case. Thus option A, B and D gets ruled out.
However, flouride in a limited amount is very useful for removing the cavities. Flouride in the foood and water enters the blood stream and make the teeth strong from inside. While the Flouride in Saliva make the teeths stronger and cavity free from outside. It reduces reminization that causes the loss of minerals.
Thus lack of flouride makes the teeth more cavity prone.
