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Fynjy0 [20]
3 years ago
15

Researchers recently discovered an exquisite fossil of a fern (land plant) in sweden. the plant was preserved instantaneously wh

en buried in a lava flow. under a microscope, scientists can see nuclei, some in different stages of cell division, along with some individual chromosomes. this fossil fern was found in a layer along with dinosaur fossils. how old could this fossil be, based upon this information and dates of events in the history of life
Biology
2 answers:
elena-s [515]3 years ago
6 0
This fossil must be younger than 475 million years old, because that is when land plants arose
Lostsunrise [7]3 years ago
4 0

Answer:

The fern may be 650 million years

Explanation:

Fossilization of organisms and plants took place many years ago. Fossils are remains of plants, animals, fungi, bacteria, and single celled living things that have been replaced by rock material or impressions of organisms preserved in the rocks. This happened when there was an anaerobic decomposition of burried dead organisms and plants that contained energy derived from photosynthesis. The organisms fossilized and became preserved in rocks.  

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Answer: and Explanation:

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3 years ago
11. What is systolic pressure?
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5 0
3 years ago
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Natalka [10]

Answer:

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3 0
2 years ago
Explain how nerves signal muscles fibers to contrast?
laila [671]

Answer:

By action potential nerve contract the muscle

Explanation:

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