Which of the following was probably the least important factorin bringing about the Cambrian explosion?(A) the emergence of predator-prey relationships(B) an increase in the concentration of atmospheric oxygen(C) the movement of animals onto land(D) the origin of Hox genes

Q: What factors are necessary for fossils to occur? I. Abundant Members II. Exist for a long time III.…

A: Introduction A fossil is preserved remains impression of any once-living thing from a past…

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: 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: Which statement is true about fossilization? (A) (B) (C) (D) Only animals with backbones…

A: Fossilization is the process of preserving plant and animal remains over a period of time by means…

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: Taphonomy tells us ab0ut preservati0n biases in the fossil rec0rd. What kind of biases affect 0ur…

A: Taphonomy refers to the branch of paleontology (study of life history based on fossils) which is…

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: What kind of community interaction encouraged the Cambrian Explosion and contributed to…

A: The Cambrian Explosion is most significant in the history of evolution because it marks the sudden…

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: The Cambrian explosion is a conundrum: how can the long prior history of the phyla, revealed by…

A: Evolution is change in the heritable qualities of natural populaces over progressive ages. These…

Q: Why did ancestral mammals survive the asteroid impact while the dinosaurs did not?

A: If an asteroid coming on earth and breaks into fragments, any fragment larger than 35 meters across…

Q: Bilateral symmetry is a(n) A B C synapomorphic ancestral claws derived analogous - trait for the…

A: A phylogenetic tree is a diagram demonstrating the evolutionary connections between a group of…

Q: ___________ were an early group of humans with short, sturdy builds and heavy supraorbital ridges…

A: Answer is d.) Neandertals.

Q: : 2. The Cambrian Explosion (approximately 550 mya to 450 mya) was a time of rapid diversification…

A: The Cambrian explosion or "Cambrian radiation" was an event that occurred approximately 541 million…

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: . One of the explanations for the diversity seen in the fossils corresponding to the Cambrian…

A: The adaptations that arose within the Cambrian were mainly for cover and predation. If one animal…

Q: With what group do hominoids share the most recent common ancestor? (a) Old World monkeys (b) New…

A: Primates are placental mammals and they originated from arboreal, small tree-dwelling shrew-like…

Q: How would the appearance of protocells have represented a key step in the origin of life?

A: Introduction  Origin of life on earth can be traced back to 3.4 billion years ago and as we now know…

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: Which of the following terms most specifically describes what occurs when a group of organisms…

A: Speciation occurs when a group of a species separates from the other members of its own type and…

Q: In cladistic analysis, (a) ancestral characters are used to reconstructphylogenies (b) characters…

A: Cladogram analysis i.e., diagram of hierarchically branching is called as Cladistic analysis, which…

Q: What you mean by living fossils?

A: Fossils can be defined as the remains or traces of the non-degraded parts of ancient living things…

Q: Heterocoelous centrum is a characteristics of- (A) Amphibia (B) Reptilia (C) Birds (D) Mammalia

A: Introduction - Multicellular eukaryotic animals make up the animal kingdom. Invertebrates and…

Q: The eon comprising the Cambrian period up to the present is called the (1). It is divided into three…

A: Geological time scale is the calendar for events in the Earth history. It is subdivided into eons,…

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: All mammals have tailbones and muscles for moving a tail. Even humans have a reduced tailbone and…

A: Evolution is the gradual progression in the inherited traits of natural populations over many…

Q: Based on phylogeny and history of evolution, do new anatomical features such as lungs (amphibians)…

A: The study of links between various groups of species and their evolutionary development is known as…

Q: Did dinosaurs and humans ever exist at the same time?

A: Homo habilis, which existed between 2.4 and 1.4 mya in Eastern and Southern Africa, is among the…

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…

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.