Answer:
fossils can be used to identify rocks of the same or diffrent ages.
Answer:
C.
Explanation:
A theory is not a guess but an explanation of <u><em>why</em></u> things happen.
DDT was used during second world war to control malaria among the troops and the civilians. Later, it was used as pesticide in agricultural and household practices. Due to its excessive use it entered into the food chain and its amount in the food crossed the permissible level. So, it was banned by United States.
Answer:
The male creeper and the female creeper are both heterozygous for the creeping trait.
Explanation:
The creeping allele Cr is dominant. For any chicken to have the wild-type long leg attribute, the dominant allele must be absent in its genotype. This means that such an individual would have two recessive alleles, each from either parent.
Hence, in order for two parents to produce wild-type offspring at all, both of them would have to be heterozygous for the creeping trait.
Assuming that the alternate trait is represented by cr allele:
Crcr x Crcr
CrCr Crcr Crcr crcr
<em>The two parents in the above cross are creepers but were able to produce wild-type offspring as a result of both parents being </em><em>heterozygous. </em>
