Energy, the absence of molecular oxygen, chemical building blocks, and time were the requirements for (a) chemical evolution (b) biological evolution (c) the Cambrian radiation (d) the mass extinction episode at the end of the Cretaceous period (e) directed evolution

Q: The term “Cambrian explosion” refers to (a) an increase in biodiversity. (b) a mass extinction. (c)…

A: Answer: Introduction: The Cambrian explosion or Cambrian radiation was an incident about 541 million…

Q: Which of the following is true concerning creatine phosphate (CP)? a) It can directly be used for…

A: Creatine phosphate is a molecule that can store energy in its phosphate bonds. In a resting muscle…

Q: The great apes made their first appearance in the fossil record between 23 and 2.6 MYA, which:…

A: The question is asking us to identify which geological period corresponds to the time frame of 23 to…

Q: Please, need help with the explanation of the answer: During Chemical Evolution, what would one…

A: Chemical evolution describes changes in entities that do not necessarily need to be able to…

Q: Ancient mammals became abundant during this period: a) Jurassic b) Triassic c) Carboniferous d)…

A: Mammals can be defined as the group of vertebrate animals  which constitutes  the class  of Mammalia…

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: 7. Fossils can form in several ways. (A) Explain 2 of the more common ways that fossils form and how…

A: fossils are the remains or impression of a prehistoric plant or animal embedded in rock and…

Q: During the first 600 million years of Earth history, enzymes, ATP , and other molecules could have…

A: The primitive earth was in the form of a red hot, solidified cloud containing free atoms. The…

Q: ''Cambrian Explosion'' What contributed to this explosion of life? What were Earth conditions like…

A: Cambrian explosion was the rapid and unparalleled rise of the organisms at the beginning of the…

Q: Describe the evolutionary significance of the Cambrian explosion.

A: Introduction  Cambrian explosion event was occurred nearly 541 million years ago during the Cambrian…

Q: Each branching point in a cladogram (a) is called a root (b) represents a clade (c) represents the…

A: cladogram is the phylogenetic tree.

Q: According to "Our Earliest Ancestors", what time period is being discussed in this video?    A.The…

A: The Eocene, Miocene, Pleistocene, and Paleocene are all epochs in the geologic time scale. They are…

Q: Which of the following helped to lay the groundwork for understanding the record of historical…

A: The Earth was created by deposition from the solar nebula approximately 4.54 billion years ago,…

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: The first single-celled organisms on Earth probably evolved (a) 3,700 years ago (b) 3.7 million years…

A: Evolution is a process of slow and gradual change over a period of time. There are many pieces of…

Q: Four billion years ago, the Earth was a thin-crusted inferno. Which probable stage of physical and…

A: Solar system was originated around 4.6 billion years ago from contraction of rotating gas and dust…

Q: Why was the Mesozoic era extinction significant to the history of mammals? a. As photosynthesis…

A: The Mesozoic era is referred to as the age of the dinosaurs which were dominant during this period…

Q: Which of the following is not a hypothesis used to describe the sudden change in the diversity of…

A: The term "Cambrian explosion" refers to a time when bilaterally symmetrical (bilaterian) animal…

Q: The Cambrian Explosion occurred due to the widespread adoption of bilateral symmetry and the…

A: INTRODUCTION The Cambrian explosion or Cambrian radiation was an occasion approximately 541 million…

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 is animal evolution during the early Cambrian referred to as an “explosion”?

A: The evolution during the early Cambrian referred to as an explosion. Here we will discuss why it is…

Q: Describe one characteristic you see in organism 3 which might have had an advantage over organism 2.…

A: *Darwin proposed that Fossil records provides evidence that the living organisms has evolved a…

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: Reduced tailbones and the associated remnant muscles in humans are an example of what type of…

A: Common descent means common ancestory. Various evidences for the same are homologous organs,…

Q: Geological time covers huge spans, up to billions of years. Yet humans rarely live for more than 100…

A: Geological time scale is important to understand the history of earth that how several natural…

Q: Plant life first appeared on land during which of the following periods? a. Cambrian period b.…

A: The palaeozoic era was divided into six periods and these were as follows: Cambrian Ordovician…

Q: 29) The Cretaceous extinction. which was the most recent mass extinction, occurred about 65.5…

A: Natural selection, or evolution, is the process by which a species' features evolve over a number of…

Q: Which of the following is characteristic of the end of the Paleozoic Era? a There was a mass…

A: As experts believe, the Earth was formed as a result of the Big Bang Explosion. The geological time…

Q: The time of greatest evolutionary diversification in the history of life occurred during the (a)…

A: Introduction  Environment plays a major role in the diversification of organisms. For example, if we…

Q: construction project required digging hundreds of feet into the ground, which exposed many discrete…

A: Theory of evolution: Evolution is a biological process involving the change and adaptation of all…

Q: The fossil record (a) usually occurs in sedimentary rock (b) sometimes appears fragmentary (c) is…

A: All life on Earth descended from the universal last common ancestor, who lived between 3 and 4…

Q: The earliest hominin that most paleoanthropologists place in genus Homo is (a) H. habilis (b) H.…

A: Paleoanthropology is defined as the study of human evolution. It is concerned with fossil as well as…

Q: Table 10: Some Important Events in Geologic Time Era Period Triassic Epoch Event Age of Reptiles…

A: * Modern mammals have evolved from preceeding animals . * Formation of modern humans from azoic era…

Q: According to the progressive, or escape, hypothesis, viruses (a) appeared before the three domains…

A: Virus is a relation between living and non living world and it is infectious. This is because ,…

Q: D Question 4 Which mass extinction led to the disappearance of the dinosaurs? O Triassic O…

A: The recurrent rise and disintegration of ice sheets and glaciers driven by the Milankovitch cycles,…

Q: The comparison of genetic material from individuals of regional populations of humans, used to help…

A: The term anthropology can be split into two greek words, “Anthropo” is defined as human beings and…

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.