Which of the following is not a hypothesis used to describe the sudden change in the diversity of lifeforms observed in the Cambrian Period?

Q: In the shale unit, you find the following fossil: What is the mode of preservation of this…

A: A Fossil is a preserved remains of an organism, its impression, or its traces. The organism when…

Q: Describe in detail 5 ways to preserve material for the fossil record.  List the 3 types of life…

A: Fossils are the preserved remains, or traces of remains, of ancient organisms.

Q: How can we explain that fossils of Mesosaurus, an extinct reptile that could not swim across open…

A: Mesosaurus, a ancient reptile that lived in freshwater amid the early Permian period. Its fossils…

Q: In what way was the evolution of eukaryotic cells linked to the increase in the oxygen concentration…

A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…

Q: what does the Cambrian “explosion” refer

A: The early phase of the Paleozoic era that started 541 million years ago and lasted up to 485.4…

Q: Using tables 2.1 and 2.2 as references, fill out the following table. The first item is given as an…

A: Geological time scale Geological time scale is a representation of Earth's history.

Q: Give two lines of evidence supporting the asteroid impact hypothesis for the Cretaceous extinctions.

A: The evidence is given below.

Q: How the evolution of oxygen was involved in the initial evolution of terrestrial life

A: Photolysis of water vapors and carbon dioxide produce hydroxyl and oxygen, individually, thus, they…

Q: Compare and contrast the “primordial soup” and the “iron-sulfur world” hypotheses.

A: In ecology, The earlier earth is formed by endogenous abiotic synthetases with the collision of…

Q: Which of the following is associated with the Cenozoic era? O a. Warmer planet O b. Different…

A: The answer is given below:    The first two are associated with the Cenozoic era.

Q: Choose the 2 groups of organisms that would most well preserved in the fossil record? Slime mold…

A: The conservation of living beings within the fossil record is impacted by different components, such…

Q: Let’s see what you already know! For this activity, you are a palaeobiologist interested  in…

A: Clue: The field site has limestone covering most of the area, with younger mudstone rocks in one…

Q: Use the following figure to answer questions 2 and 3. mya - million years ago 1,400 mya -1 bilkan…

A: Earth was formed in our solar system along with other planets, and its age is about one third of…

Q: What are some of the hypothesized causes of Earth’s biggest mass extinctions?

A: A mass extinction is typically described as the extinction of roughly three-quarters of all species…

Q: Radiometric dating measures the decay of radioactive isotopes present in layers where fossils are…

A: Radiometric Dating denotes reliable clocks to date out ancient events back to the formation of Earth…

Q: Refer to Figure 2A in the article.  Which of the following best describes the change in the…

A: Molluscs have a soft, unsegmented body that is often protected by a hard shell. They also have a…

Q: Why should we expect to find N. fosteri fossils all over the world, given that it first evolved in…

A: Pangea is a supercontinent that was surrounded by a global ocean called Panthalassa. Fossils are…

Q: The first fossils were of 1. amoeba 2. trilobites 3. yeast 4. stromatolites

A: The history of palaeontology is the study of the fossil record left behind by living species in…

Q: Why did Shubin and his colleagues choose to look in the Canadian Arctic for transitional fossils?

A: As explained by Neil Shubin answer why he chose the Canadian Arctic for transitional fossils takes…

Marine Evolution

Marine habitat is less explored, and hence, its biological diversity is far less known. The marine habitats are not constant due to their shifting nature, while the terrestrial habitats are more stable. Marine biology is the science that deals with the study of diverse marine species, their interactions, and behavioral characteristics.