The deeper you go down in to the rock the older the fossils get. So when the scientists go in to the rock they can say what animals lived in that time and what animal was the oldest.
The answer is The Netherlands
Answer:
B) ecological succession
Explanation:
The analogy given in this question describes ECOLOGICAL SUCCESSION, which is the series of changes that an ecosystem undergoes over a period of time. Ecological succession is of two types viz: Primary succession and Secondary succession.
Primary succession involves the series of changes that occurs on a new habitat that has never been previously colonized. This is the case of the colonization of bare rocks with no plant life by LICHENS. The action of the lichen, which involves secretion of acids that disintegrates the rocks into soil, paves way for the colonization of that area by new species.
Lichens, via the role they play in primary succession by helping alter a barren area into a fertile one that accommodates other organisms, makes them be regarded as PIONEERS of primary succession.
Males have an X and a Y chromosome thus denoting males as XY. Traits carried on chrosomes 1-22 are autosomal<span> traits. Traits carried on the X and Y chromosomes are </span>sex linked<span> traits. Not all traits on the X and Y chromosome are to do with sexual characteristics eg colour blindness is a trait found on the X chromosome.</span>