Question and answer
What is the name for a fossil that is common to a particular period of geologic time and serves as an indicator for that time? A. coprolite
B. microfossil C. index fossil D. stromatolite
The answer is C. index fossil
Expert answered|jher000|Points 7504|
Question
Asked 7/24/2012 12:39:21 PM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
Questions asked by the same visitor
who discovered that it is possible to alter a magnetic reading using an electric current?
Weegy: Oersted in Denmark (More)
Question
Expert Answered
Asked 7/23/2012 11:58:27 AM
0 Answers/Comments
Choose two consecutive sections of geologic time (for example, Triassic and Jurassic, or Cambrian and Ordovician). What distinguishes these periods from one another? What was going on geologically then? What kinds of plant and animal life were common during these periods?
Weegy: The Triassic–Jurassic extinction event marks the boundary between the Triassic and Jurassic periods, 199.6 million years ago,[1] and is one of the major extinction events of the Phanerozoic eon, profoundly affecting life on land and in the oceans. [ In the seas a whole class (conodonts)[2] and twenty percent of all marine families disappeared. On land, all large crurotarsans (non-dinosaurian archosaurs) other than crocodilians, some remaining therapsids, and many of the large amphibians were wiped out. At least half of the species now known to have been living on Earth at that time went extinct. This event vacated terrestrial ecological niches, allowing the dinosaurs to assume the dominant roles in the Jurassic period. This event happened in less than 10,000 years and occurred just before Pangaea started to break apart. In the area of Tübingen (Germany), a Triassic-Jurassic bonebed can be found, which is characteristic for this boundary.[3] Statistical analysis of marine losses at this time suggests that the decrease in diversity was caused more by a decrease in speciation than by an increase in extinctions. Several explanations for this event have been suggested, but all have unanswered challenges: Gradual climate change, sea-level fluctuations or a pulse of oceanic acidification[5] during the late Triassic reached a tipping point. However, this does not explain the suddenness of the extinctions in the marine realm. Asteroid impact, but so far no impact crater of sufficient size has been dated to coincide with the Triassic–Jurassic boundary. ] (More)
Question
Expert Answered
Asked 7/23/2012 12:16:37 PM
0 Answers/Comments
During which period did the first large herbivores and carnivores appear? A. Devonian B. Mississippian C. Pennsylvanian D. Permian
Question
Updated 176 days ago|9/3/2014 4:45:53 PM
1 Answer/Comment
During the PERMIAN period, the first large herbivores and carnivores appear.
Added 176 days ago|9/3/2014 4:45:53 PM
This answer has been added to the Weegy Knowledgebase
The early Paleozoic era was the time of the Cambrian explosion. What happened during the Cambrian explosion? A. Earth was undergoing lots of contractions as it cooled off. B. There were frequent earthquakes and lots of volcanic eruptions. C. Earth was bombarded by a great number of asteroids and comets. D. Many new life-forms appeared, including most of the known types of invertebrates.
Weegy: Fish, arthropods, amphibians and reptiles all evolved during the Paleozoic. Life began in the ocean but eventually transitioned onto land, and by the late Paleozoic, it was dominated by various forms of organisms. (More)
Question
Expert Answered
Asked 7/24/2012 12:09:27 PM
0 Answers/Comments
The term fossil is best defined as _________. A. bones and teeth B. any evidence of past life C. something that is really old D. the preservation of an entire organism
Question
Updated 240 days ago|7/2/2014 10:52:32 AM
1 Answer/Comment
The term fossil is best defined as the preservation of an entire organism.



Added 240 days ago|7/2/2014 10:52:32 AM
19,699,512 questions answered
Popular Conversations
Theodore Roosevelt became president when William McKinley was ...
Weegy: False. Theodore Roosevelt became president after William McKinley was assassinated.
2/26/2015 7:38:06 AM| 5 Answers
The phase change that is the reverse of sublimation is A. ...
Weegy: Boyle's law states that the volume of a gas is inversely proportional to its pressure if the temperature and the ...
2/26/2015 2:21:23 AM| 3 Answers
whats lush
Weegy: 1+1 = 2 User: whats in a heartbeat
2/26/2015 12:22:58 PM| 3 Answers
A ratio compares two numbers by division. True User: The ratio of ...
Weegy: When ratios are used in comparing units of measure, the units should be the same. User: In writing the ratio ...
2/26/2015 1:31:50 PM| 3 Answers
What is the reciprocal of 3/8? User: what is the reciprocal of 4/15 ...
Weegy: The reciprocal of 4 is 1/4. User: what is the reciprocal 4 2/3 Weegy: The reciprocal of 4 is 1/4. ...
2/27/2015 12:39:39 PM| 3 Answers
Comprehension The questions below refer to the selection “Digging.” ...
Weegy: B) miners User: Comprehension The questions below refer to the selection “Digging.” The father and ...
2/26/2015 6:39:22 AM| 2 Answers
Cephalopods dwell in ___. a. ponds b. oceans c. lakes d. rivers
Weegy: While you may not have heard of the term cephalopod, you have probably heard of at least a couple of the animals ...
2/26/2015 7:17:50 AM| 2 Answers
How can one receive fundamental rights? a. born a citizen c. ...
Weegy: who are you looking for? User: abolished national origins quotas Weegy: The Hart-Celler Act abolished the ...
2/26/2015 7:54:13 AM| 2 Answers
Weegy Stuff
S
1
L
1
L
P
P
L
P
P
P
Points 1086 [Total 16868]| Ratings 0| Comments 1086| Invitations 0|Offline
S
L
P
L
P
P
Points 1047 [Total 7822]| Ratings 0| Comments 1047| Invitations 0|Offline
S
P
C
L
P
L
1
Points 621 [Total 7301]| Ratings 4| Comments 581| Invitations 0|Offline
S
Points 572 [Total 911]| Ratings 5| Comments 522| Invitations 0|Offline
S
1
L
L
Points 421 [Total 7487]| Ratings 1| Comments 411| Invitations 0|Offline
S
Points 202 [Total 347]| Ratings 1| Comments 192| Invitations 0|Online
S
Points 149 [Total 169]| Ratings 0| Comments 149| Invitations 0|Offline
S
Points 91 [Total 91]| Ratings 0| Comments 91| Invitations 0|Offline
S
Points 47 [Total 47]| Ratings 0| Comments 37| Invitations 1|Offline
S
1
L
1
Points 31 [Total 3441]| Ratings 3| Comments 1| Invitations 0|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.