Evolution: Extinction (PBS Documentary)

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I've come back and rewatched this many times. I love this documentary and that man's Eugene Levy eyebrows

darthmaule

I fall asleep listening to this on my headphones every night 😴😴

jimogrady

Why are there no closed captions for the Deaf and Hard of Hearing? Please add them to all your PBS Documentaries.

yvettekellar

52:32 This is my favorite part where they see a perfect photo of a Siamese Crocodile.

dylangeltzeiler

ok after 22 minutes it kinda got intersting but im not going to say i like school!

ywxspvz

Is anyone watching this at times 2 speed? LOL

cheyennenicolettekong

hello sad students who need to watch a boring video to answer boring questions 😭🔫

sophiaalimagno

PBS Evolution
Extinction
link to video

Each strata or layer of rock represents a different time period. Which layers are the oldest?

The layers at the bottom are most likely the oldest

What changes occurred in the Earth leading up to the Permian extinction with…

Volcanoes?

The extinction was caused by increased temperatures and extensive oceanic anoxia caused by massive volumes of carbon dioxide produced by the Siberian Traps eruption, according to scientific consensus.

Sea level?

Global warming rendered animals unable to breathe, resulting in the Permian mass extinction in the waters.

Global temperature?

The extinction was caused by increased temperatures and extensive oceanic anoxia caused by massive volumes of carbon dioxide produced by the Siberian Traps eruptions, according to scientific consensus.

Composition of the atmosphere?

The Siberian Traps eruption emitted significant volumes of carbon dioxide, which resulted in increased temperatures and widespread oceanic anoxia, according to scientists.

What percent of species on the Earth went extinct during this event?
95% of marine species and 70% of terrestrial species

Explain how food webs are like a house of cards. Why can the loss of one or two species lead to the loss of many more?
If one organism fails the rest will too just like a house of cards, remove one and the rest fall. When one species goes then the predators or prey will either over or under populate causing a chain reaction.

The Triassic

What predator dominated the Triassic?

Rauisuchians

In general, what did mammals look like during this time period?

Early well evolved creatures of the late Triassic and early Jurassic were little, infrequently in excess of a couple of crawls long. They were fundamentally herbivores or insectivores and subsequently were not in direct rivalry with the Archosaurs or later dinosaurs. A considerable lot of them were likely in any event incompletely arboreal and nighttime also.

How did mammals survive the Triassic in spite of their smaller size?

The warm blooded creatures endure the Triassic time frame since they were almost undetectable, they repeated rapidly, and they were nighttime 8. The well evolved creatures were more ready to endure the K-T occasion since they been able to tunnel and shroud underground The 6th Elimination 9.

Why were mammals more able to survive the K-T event, and eventually thrive?

Mammals, on the other hand, could consume insects and aquatic plants, both of which were plentiful following the meteor strike. Mammals began to thrive when the last dinosaurs died off.

The Sixth Extinction

What animals are often the first to disappear or go extinct within an ecosystem?

The animals that run out of food or necessities

In a food chain, 100 pounds of plant will support…

pound(s) of herbivore, which will support…

pound(s) of carnivore.

What is the number one cause of human-related extinction?

Global Climate

What is the second-biggest cause?

Invasive species

How does the fossil record in Hawaii change after the Polynesians settled there?

The Hawaiian Islands were first settled as early as 400 C.E., when Polynesians from the Marquesas Islands, 2000 miles away, went to Hawaii's Enormous Island in kayaks

How does the fossil record in Hawaii change after the Europeans settled there?

The fossil record in Hawaii changes after the settlement of the Europeans since they likewise carry organic intruders with them and a large number of various plants 15.

How did the brown tree snake affect Guam’s biodiversity?

The earthy colored tree snake has obliterated Guam's birds and herpetofauna, causing the neighborhood elimination of over portion of Guam's local bird and reptile species just as two out of three of Guam's local bat species

What characteristics do invasive species have that give them an advantage in a new ecosystem?

Obtrusive species are regularly fruitful in their new biological systems since they can repeat and develop quickly or on the grounds that their new climate does not have any common hunters or irritations. Therefore, obtrusive species can compromise local species and disturb significant environmental measures.

How does leafy spurge negatively impact the Great Plains farmers?

The verdant spurge is contrarily affecting the extraordinary fields ranchers since it is assuming control over their fields and making the local grasses bite the dust and it powers ranchers to raise less steers on the grounds that the dairy cattle will not eat it 18.

What other invasive species is used to help control the leafy spurge?

A considerable lot of the known verdant spurge populaces in New Mexico have been treated with Aphthona bug insects. Utilizing an insect bug in blend with touching and additionally herbicides has been discovered to be a superior procedure for verdant spurge control than utilizing a solitary control technique without anyone else.

List the organisms captured by the hidden cameras in Thailand. What do all these organisms have in common?

Tigers, Elephants, Siamese, Panthers, Crocs. The one thing these creatures share practically speaking are none of them are terminated and they are proceeding to advance in Thailand.

jeanswet