Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Bio > Chapter 2 Dinos > Flashcards

Chapter 2 Dinos Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

What was the time period of the mesozoic era and what was it referred to as ? What dinosaurs were first to show up

A

238 mya until 65.5 mya
Age of dinosaurs
Small bipeds carnivorous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Three major divisions to Mesozoic era

A

Triassic
Jurassic
Cretaceous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Triassic: named for ?
Occurred when
The what dinosaurs show up when

A

Three rock layers in Germany
251-200 mya
Oldest Dino’s midway through period

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q 
Jurassic
Named from?
Occurred when
Time of the what Dino's?
Movie Jurassic park ?
A

Limestone layer in Jura mtns of Switzerland
200-146 mya
Largest
Dino’s from other periods primarily Cretaceous

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Cretaceous
Named for
When?
This was what stage for Dino’s and who ruled
What happened at end of Cretaceous period

A

Chalk layers (creta=chalk) in Eastern Europe
146-65.54
Final stage , T. rex
Dinosaurs excluding birds went extinct 65.54

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

How do you know numerical age of bones from Mesozoic era

A

Breakdown of radioactive isotopes found in sediments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the best isotope for dating rocks from the age of dinosaurs … which breaks down into what

Where is it present

A

Uranium 235
Lead 207

Pure unaltered state in lava and ashes from volcanoes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is a half life

What is half life of uranium

Describe what happens after one half life

A

The amount of time it takes for half of the original material to break down

704 million years
50% will be uranium and the rest led

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What was weather like in equatorial regions and middle latitudes
Closer to the poles it was

A

Arid
Like Florida
Cool wet and rainy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

In the Triassic period all continents were ?

A

Adjoined into one super continent known as Pangea

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

When the plates moved apart what is this called

A

Plate tectonics :

The continental movements are driven by volcanic sea floor spreading in the oceans

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Dinosaur distributions have played a major role in?

Allosaurus and breachiosaurus are found in?

A

Determining positions of continents in Mesozoic era

North America and Northern Africa - they abutted

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Were there ice caps at the poles ?
Consequently this means there was more ?
Give me an example

A

No
More free water and greater portion of continents covered by water
North American seaway that spanned north to south split in two so sea monster remains are in Wyoming and Montana

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

The landscape was ?

A

Flatter

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What plants dominated dryer ecosystems

Water areas ?

A

Larger gymnosperms such as pine trees conifers cypress trees ginkos
Low lying ferns horsetails club mosses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What was the ground cover like

A

Less

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Characteristics of gymnosperms during this time

Served as dinosaur? Because why

A

Great height, chemical defenses , thick bark, tough foliage

Drought and fire resistant

Repellents : poor ability to regenerate and show slow growth if damaged

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What showed up midway through Cretaceous period in terms of plants

A

Fast growing disturbance tolerant angiosperms (flowering plants)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What happened when angiosperms showed up

A

World became more vegetated with ground cover all over and closed forests of deciduous trees became abundant

20
Q

What diversified at the time of angiosperms and grass is a type of ? And grasslands make up of

A

Ground feeding herbivores
Flowering plant
20% of vegetative cover of earth

21
Q

Nearly all dinosaurs were what animals ?

A

Terrestrial

22
Q

Aside from what dinosaur they have no evidence of what?

A

Spinosaurs

Them being amphibious

23
Q

The earliest crocodiles were ?

A

Small agile terrestrial predators

24
Q

What is the 32 foot long crocodile he worked with
Work with growth lines in bony armor of animal reveal ?
How do they actually grow giant

A

Deinosuchus terror crocodile
Became giant not by growing fast, but by growing at same rates as living alligators
Extend length of rapid growth phase (like us in early mid teens) for an extra 20 years

25
Q

The first turtles from the Triassic period were

A

Fully terrestrial and had teeth

26
Q

Turtles that looked normal came about in ? Archelon was a gigantic?

A

Jurassic and Cretaceous

Sea turtle 13.5 feet long from late Cretaceous of midwestern North America

27
Q

In the seas were ? Which were reptiles that
Some were how long and deep diving had ?
From embryos found they know that like mammals they have

A 
Ichthyosaurs 
Looked and swam like dolphins 
40 ft
Gigantic eyes 
Live birth
28
Q

What is the supposed Loch ness monster
Body’s like ?
But necks were long and snake like with up to ? How did they swim ?

A

Long necked plesiosaurs
Sea turtles
80-90 vertebrae
Sea turtles flying through water column and some reached gigantic proportions

29
Q

What animal did Cuvier use in support of extinction theory?
What did they eat
How long
Swam like what

A

Mosasaurs
Ate ammonites
50ft
Crocodilians using tails for propulsion

30
Q

No birds until what period , but what abounded throughout the age of Dino’s ?

A

Late Jurassic

Pterosaurs

31
Q 
Pterosaurs 
First ?
What supported their wings
Had big for the attachment of ?
-which is key for an ?
Smallest forms covered by ?
Bones were heavy or light 
Early had long ?
A 
Powered flyers 
Fourth finger
Sternum 
Flight muscles 
Flapping 
Fur or feather like 
Light
Tails
32
Q

Largest known pterosaur
Although bugger form found in
Where is it found and how does that play into eating

A 
Quetzalcoatalus
36 foot wingspan
Spain 40 foot
Well inland 
Scavenged dead dinosaurs
33
Q

When did mammals appear
What were they initially
They remained SO throughout

A

Same time as Dino’s in late Triassic
Rat or weasel like
And mouse to opossum sized
173 million year tenure of Dino’s

34
Q

Fossils are evidence of ?

A

Ancient life

35
Q

What is another category of dinosaur fossils ?

A

Trace fossils , not remains of animals themselves - traces of ancient life

36
Q

What is coprolites

What are the primary means by which paleontologist learn about dinosaur biology

A

Fossilized feces

Trace fossils

37
Q

What ways are remains if animals buried rapidly ?

A

From rivers (most common) wind blown sand (fairly common) volcanic ash (rarely)

38
Q

Sedimentary rocks are? They most commonly

A

Rocks formed from sedimentspreserve dinosaur skeletons

39
Q

Igneous rocks are

A

Rocks formed from volcanoes

40
Q

Metamorphic rocks are

A

Sedimentary or igneous rocks that have been deformed by pressures of earth

41
Q

Fossil bones are composed of ?

A

Original calcium phosphates (hard mineral in bones)

42
Q

Animals only very rarely become ? A case in point is that most Dino’s are known only from
Such as

A

Fossilized
Single partially complete specimens
Compsognathus

43
Q

Most dinosaurs are found in

A

Eroding or of earth

44
Q

Most dinosaur fossils are found

A

In rocks formed from sandy river sediments because these environments contained a lot of sediment to bury large animals

45
Q

Badlands are what? And are found where

A

Bad places to grow crop (see lots of exposure)

Throughout midwestern United States Alberta and Saskatchewan (Canada)

46
Q

Florida does not have

They lie

A

Exposed terrestrial Mesozoic sediments

Thousands of feet underground

Bio (18 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions