The correct answer is true. I really hope this helps!
I believe the above statement is true.
According to the law of conservation of mass, in a normal chemical equations, mass is neither created nor destroyed. Stoichiometry mainly deals with the chemical quantities of balanced chemical equations. The balancing of chemical equations ensures that the mass is maintained during a chemical reaction, such that the quantity of each element in the reaction is maintained.
Answer:
Microscopic charcoal, Vegetation.
Explanation:
- As the researchers conducting research in the Nile region identified that an increase in temperatures leads to an increase in droughts and reduction of natural vegetation and thereby the chances of the occurrence of natural fires.
Answer:
It should be D but selective breeding would work because of the selection of dog breeders trying to get new dogs such as a cockapoo which is a cocker spanole and a poodle. Also many other dog breeds that were selected to try out and breed.
Explanation:
Genetics, blood type gene has two alleles, each allele has genotype A, B or O. The A and B are dominant, and O is recessive. So allele A combined with allele O is type A. Similarly, BO is type B, AA is type A, BB is type B, OO is type O, and AB is typeAB.
If both parents have type A blood, then the alleles could be AA or AO, thus the allele A frequency is 75%, allele O frequency is 25% for both parents.
So the chance of alleles OO is 25% × 25% = 6.25%,
alleles AA is 75% × 75% = 56.25%,
alleles AO is 75% × 25% = 18.75%,
alleles OA is 25% × 75% = 18.75%.
Since AA, AO and OA are blood type A, and OO is blood type O, thus their child has 6.25% chance to be blood type O and 93.75% chance to be blood type A.
The +/- is called the rhesus factor, with + being dominant, and - being recessive.
So if both parents are -, the kids are always -, otherwise the kids might be + or -.
Child Blood Type Estimate Table:
Father's Blood TypeABABOMother's
Blood
TypeAA/OA/B/AB/OA/B/ABA/OBA/B/AB/OB/OA/B/ABB/OABA/B/ABA/B/ABA/B/