Period mya 540 490 445 415 360 300 250 200 145 65 2.6 0.0 Paleogene Neogene Cambrian Ordovician Sikurlan Devonlan Carboniferous Permian Triassic Jurassic Cretaceous Quaternary Bar width represents numbor of living families Extinction Extinction Groups experiencing mass extinction Extinction Extinction Ordovician: 50% of animal families, including many trilobites. Extinction Cretaceous: 50% of animal families, including the last of the non-avian dinosaurs and many marine species. Dovonian: 30% of animal families, including many fishes and trilobites. Triassic: 35% of animal families-in particular, many reptiles. Permian: 60% of animal families, including many marine species, insects, amphibians, and all remaining trilobites.

Q: Which of the following models is supported by the observation that few transitional links are found…

A: Transitional Fossil:          Any fossilized remains of a life form that exhibits traits common to…

Q: Distinguish

A: Distinguish between biological extinction and mass extinction  Biological Extinction  are common…

Q: water bears

A: Introduction  Koalas and bears share logical order up to the class level, Mammalia, before they…

Q: What is the evidence that the megafaunal extinction in the Pleistocene was partly caused by humans?

A: Megafauna and Human  Simply large mammals are mega fauna. Elephants, goats ,fish,  lions and even…

Q: The Cenozoic Era As you do the lab, fill in the last two columns for the Paleocene through the…

A: Introduction Evolution is the process by which different species are evolved over time in response…

Q: How have humans influenced extinctions?

A: Extinction caused by human activities is called Holocene extinction. There is a correlation between…

Q: "Human induced extinctions are therefore undesirable" Explain this  ?

A: The ecosystem comprises both biotic and abiotic factors. The biotic factors include all the living…

Q: Look at the upper right side of this diagram of the phylogenic tree. What does it suggest has…

A: The phylogenetic tree is defined as the diagram that will represent or depict the evolutionary…

Q: what is meant by “mass extinctions.”

A: Mass extinction is the extinction of a large number of species within a relatively short period of…

Q: Throughout Earth’s history, many species, and perhaps even most of the species that ever existed,…

A: Humans never caused extinctions. Extinction generally caused due to some conditional changes.

Q: What is a mass extinction?  What makes the 6th mass extinction that is happening right now different…

A: Mass extinction is when a species vanishes or goes extinct much faster than they are replaced.  It…

Q: Distinguish between background extinction and mass extinctions.

A: The differences between mass extinction and background extinction includes the following.…

Q: When North America and South America joined due to continental drift, what may have caused the North…

A: Continental drift is a hypothesis according to which continents on Earth have moved over geologic…

Q: How does the process of adaptive radiation contribute to the incredible animal diversity observed in…

A: Adaptive radiation is a fundamental evolutionary process that contributes to the rich diversity of…

Q: The map below shows how the continents once were connected together (link to bigger map if you need…

A: Evolution is a step by step and gradual process that took millions of years to attain stability. It…

Q: What patterns can be compare to the mass Extinctions events?

A: Mass extinctions are followed by the pattern : Adaptive Radiation Increasing Earth's Biodiversity.

Q: explain why biologists fear that a mass extinction is occurring as a result of human activities?

A: The ecosystem is considered to be a geographic area, where plants, animals, and all other non-living…

Q: Which of the following would be considered an adaptive radiation? A new island forms and many…

A:

Q: In 1983, a team of scientists discovered a fossilized bone of a giant bird when excavating land in…

A: Fossil A remnant or imprint of extinct animals or plant on rocks, deep sea, or snow is known as…

Q: Define the term extinct. Also explain the phenomenon of mass extinction.

A: Extinct It refers to the no longer existence  of a species, organisms, family or a group of animals,…

Q: If a researcher were to only conduct studies of rotifers in homogeneous environments and never in…

A: Since we only answer 1 question in case of multiple question, we’ll answer the first question as the…

Q: Has the number of species on Earth increased steadily since the origin of life?

A: Ans: Species: The species are those which are capable of interbreeding and producing the offspring.…

Q: The greatest mass extinction episode in the history of life occurred at what boundary? (a)…

A: Mass Extinction events can be defined as those events in which half or more than half of all…

Q: Why was it believed that life began in the seas and not in land or air? * Land and air were…

A: Option a is correct  Land and air were inhospitable places for life during the archean eon.

Q: According to the land bridge theory, why may people have crossed into North America from Siberia?

A: Landbridge theory, states that early animals and people traveled from Siberia to Alaska across a…

Q: Discuss Triassic-Jurassic Extinction. Make sure to discuss the possible causes of the extinction,…

A: Dinosaurs were among the biggest and most fascinating animals to ever roam the Earth's surface.…

Q: How many mass extinctions have occurred total? List several possible causes.

A: Extinction is defined as the extermination of a species from the earth. Species extinction is caused…

Q: Describe one hypothesis that explains the extinction of large mammals in the late Pleistocene.

A: The Pleistocene, sometimes known as the Ice Age, is the most recent glaciation-filled period on…

Q: Describe one of the major extinction events during the Late Paleozoic or Mesozoic (include when it…

A: Description of the major extinction event occurred in late paleozoic Or medozoic era.

Q: What are the five mass extinctions of the past and the current theory of the sixth mass extinction?…

A: The objective of the question is to understand the five major mass extinctions that have occurred in…

Q: This tropical area that existed 37-29mya provided was home to many various species, including…

A: The Rukwa Rift Basin is an endorheic rift basin in southwestern Tanzania that includes Lake Rukwa.…

Q: Why do island chains provide ideal conditions for adaptive radiation to occur?

A: Evolution is a  process of gradual changes in the genetic composition of an organism based on the…

Q: Define the term extinct. Also explain the phenomenon of mass extinction.

A: A species is the essential unit of grouping and an ordered position of a life form, as well as a…

Q: Could the First Biological Molecules Have Formed NearVolcanoes on Early Earth?

A: In 1953, Stanley Miller conducted an experiment in the laboratory of Harold Urey to understand the…

Q: How does the law of faunal succession provide support for the theory of evolution?

A: The phenomenon of evolution of a population to form distinct species is called speciation. A group…

Q: south america and africa are drifting apart. where might they be couple hundred years ago?

A: introduction: Continental drift theorey proposed by Alfred Wagener. According to wagener all tge…

Q: What pattern has been observed between humans moving to a new area and extinction?

A: Human population has been increasing continuously and to give an idea it was about 1 billion in the…

Q: Explain at least one reasonable hypothesis about what caused the extinction of the dinosaurs at the…

A: First dinosaurs appeared in the Triassic period  and they were abundant in Jurassic period of…

Q: Which event in Earth’s historyeventually lead to the evolution of multicellular lifeforms?

A: The process of evolution of multicellular life from simpler, unicellular microbes was an important…

Paleontology

A branch of science concerning the scientific study of life from ancient times is known as paleontology. The scientists working on paleontology are known as paleontologists. Paleontologists collect the fossils of organisms from ancient times to classify them. The paleontologists also study the environment from ancient times to study the interactions between different organisms.