Answer:
- the discovery of the Pangaea Theory.
In 1912 Alfred Wegener (1880-1930) proposed that the continents were once compressed into a single protocontinent which he called Pangaea (meaning "all lands"), and over time they have drifted apart into their current distribution.
The east coast of South America and the west coast of Africa seem to fit together like pieces of a jigsaw puzzle, and Wegener discovered their rock layers “fit” just as clearly. South America and Africa were not the only continents with similar geology. Most all of the other continents fit together too.
Hello. Happy to help.
1) Coast Lines: The location of marine fossils can help determine where and when ancient coast lines were in the past.2) Climates: Fossils can be used to determine the past climates. (Was an area cooler or wetter than the present.)
The presence of marine or land fossils indicates whether the land at one time was at the bottom of the ocean or not.
Also, you could mention radioactive dating and relative dating. I am sure that is mentioned in your curriculum.
Hope that helps.
Four conditions are needed for natural selection to occur: reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population. If they are met, natural selection automatically results.
Answer:
Explanation:
leptoteno es el estado inicial de la profase I en la meiosis.
caracteristicas
Los cromosomas se hacen visibles y a menudo se encuentran en una configuración en ramillete, con uno o ambos extremos de los cromosomas reunidos en un punto de la membrana nuclear interna.
los cromosomas aparecen como largos filamentos
cada cromosoma esta constituido por 2 cromatidas
Answer:
Explanation:
Metric Units helps to make measurements and calculation a easy task.
Metric unit is a Standard system that enables result to be comoare among scientist including biology scientist when work from different part of the country.
metric system has individual unit that is few about 30 individual units that are important in some fields.
