A non-renewable resource is a natural resource that cannot be readily replaced by natural means at a quick enough pace to keep up with consumption. One way to preserve them as long as possible is to decrease the use of them or use renewable resources instead.
Answer:
You have to do a test cross. If all the offspring have normal wing, then the the stock are from pure-breeding flies, but if 3/4 of the offspring have normal wings and 1/4 have short wings, then the stock is from heterozygous for the wing-length trait.
Explanation:
A test cross was proposed by Mendel. It was developed to determine the zygosity of an individual. It consists in crossing the individual (which present the dominant phenotype) with an individual that exhibits the recessive phenotype. Then you have to analyze the proportions of phenotypes in the offspring.
If a pure-breeding individual is crossed with a homozygous recessive individual; then all the offspring will have the dominant phenotype.
If a heterozygous individual is crossed with a homozygous recessive individual; then 3/4 of the offspring will have the dominant phenotype, and 1/4 will have the recessive phenotype.
To have the dominant phenotype, the individual need to have at least one dominant allele, while to have a recessive phenotype, both alleles need to be recessive.
B. Decreasing the surface area of solid reactant;
Why? Collision theory suggests that the more opportunities for reactants to come into contact or "collide" with other reactants, the faster the reaction will take place. Hence, decreasing the surface area will decrease the probability of collisions between reactants thereby decreasing reaction rate.
The best example of hypothesis which leads to new experiment methods was done by Morgan where he used fruit flies.
Thomas Hunt Morgan continues on genetic research which is of Gregor Mendel.
The answer would be A(crops are planted in the residue of previous crop without plowing)