EARTH SCIENCE
FOSSILS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Ferns became less abundant during the Cenozoic era.
|
|
|
Ferns did not have the resources they needed during the Cenozoic era.
|
|
|
Species A disappeared after a mass extinction event caused the extinction of all ferns.
|
|
|
Species A became extinct because of increased competition from other species of ferns.
|
Detailed explanation-1: -Cenozoic Era Common Cenozoic fossils include cat-like carnivores and early horses, as well as ice age fossils like wooly mammoths. Caves can preserve the remains of ice-age animals that died in them or were transported there after death.
Detailed explanation-2: -Today, scientists use a variety of techniques to date rocks and fossils precisely. Most often, they measure the amounts of particular radioactive elements-often radiocarbon or potassium-present to determine when a rock was formed, or when an animal or plant died.
Detailed explanation-3: -They can teach us where life and humans came from, show us how the Earth and our environment have changed through geological time, and how continents, now widely separated, were once connected. Fossils provide important evidence for evolution and the adaptation of plants and animals to their environments.
Detailed explanation-4: -A paleontologist collects as many fossils as possible from a rock or sediment. Once the fossils are prepared by scraping and cleaning, they are sorted by geometry. Fossils with very similar geometry are assumed to belong to a single species.