Answer:
Option (1)
Explanation:
According to the law of superposition, the rocks that are found at the bottom of an undisturbed sedimentary sequence are the oldest rocks as these layers are initially formed due to the process of deposition, sedimentation and lithification, and with progressive sedimentation, the rock layers that are formed at the the apex portion are the youngest rocks.
So, the fossils found in bottom rocks are the oldest fossils, and those fossils that are found in the top layer are considered to be the youngest fossils.
Thus, the oldest fossils are the ones that are found in the deepest strata.
Therefore, the correct answer is option (1).
Answer:
Genetic drift
Explanation:
Genetic drift describes random fluctuations in the numbers of gene variants in a population. Genetic drift takes place when the occurrence of variant forms of a gene, called alleles, increases and decreases by chance over time. These variations in the presence of alleles are measured as changes in allele frequencies.
Answer:
What we eat matters. The food choices we make every day have a big effect on the environment. The good news is that even small changes in what we buy and eat can add up to real environmental benefits, including fewer toxic chemicals, reduced global warming emissions, and preservation of our ocean resources.
Explanation:
