Which of the following periods is the earliest during which animals may have appeared? a. Ordovician period b. Cambrian period c. Ediacaran period d. Cryogenian period

Q: The Cenozoic Era extended over which of the following time periods in the fossil record? A. the…

A: Answer : The Cenozoic Era extended over  time periods in the fossil record is :  a)  the Paleozoic…

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: An analysis of a phylogeny that displays data about the fossil record over time reveals all of the…

A: Answer : option (C)  - Evolution is the result of interactions between organisms and their…

Q: Bivalvia: Gastropoda: Cephalopoda: Nautiloidea: Ammonoidea: Coleoidea: Belemnitida: Mollusca: MYA…

A: Geological time scale is one type of calendar or tool by which we can understand the event of earth…

Q: How did the researchers use the DNA of living sponges to make conclusions about events occurring…

A: Answer- Every organism in a particular species have 99 percent same DNA sequence. Even among…

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: Which of the following techniques examines the decay of carbo an object? O A. Radiometric dating O…

A: For the determination of the age of living or nonliving materials the scientist usually determined…

Q: Which of the following is the most likely organism to fossilize and be found in the fossil record?…

A: Step 1 Fossils are remains, tracks, impressions, or traces of organisms that existed in the past.…

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: Which of the following geologic periods is not part of the Paleozoic Era? the Carboniferous Period…

A: The objective of the question is to identify which of the given geologic periods does not belong to…

Q: According to the stratigraphic system which was eventually used by Scottish geologist Charles Lyell,…

A: The objective of the question is to identify the correct time period that corresponds to the…

Q: What is one way we can determine the age of fossils Adaptive Dating O Structural Dating Geometric…

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

Q: Which of the following eras in Earth's history is the longest? Precambrian Cenozoic Paleozoic…

A: A geological era divides eon into smaller unit of time. Geological era are further divided into…

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: Which of the following statements is incorrect in the context of fossilization? Minerals dissolved…

A: The process in which part or whole of animal or plant is being preserved in hard form is known as…

Q: The____ tool industry characterizes the Middle Paleolithic / Middle Stone Age and spans the time…

A: Introduction Evolution is the process of gradual, heritable change in the characteristic of the…

Q: Describe six types of fossils and how they form. What presentenvironmental conditions might preserve…

A: Fossils: Fossils are considered to be the parts or the remains of the organisms that are preserved…

Q: Which of the following is NOT true for relative dating methods: A. Relies on observational skills B.…

A: The objective of the question is to identify the statement that is not true for relative dating…

Q: Given the nautiloid suture pattern what can you infer about their habitat in the past and present?

A: Living beings, according to numerous "evolutionary theories," modify their physical and anatomical…

Q: 5. The Mesozoic Era extended over which of the following time periods in the fossil record? A. the…

A: Answer - B. The age of reptiles", from 251 million years ago to 65 million years ago.

Q: which statement about macroevolution is true? a. The history of life on Earth follows a general…

A: ANSWER;- c). The theory of gradualism proposes that major evolutionary changes that happen…

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: Compare and contrast the difference between a prehistoric organism and modern-day organisms. What…

A: Answer

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: 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: Explain what significant events happened during the Five major extinction events between the late…

A: An extinction event (also recognized as a mass extinction) is a large-scale and sudden loss of…

Q: Transitional Fossils: Which of the following is the corre sequence in the evolution of structures…

A: Vertebrate incursion from aquatic to terrestrial environments required a significant change in their…

Q: During the ____ epoch, there were fewer ____ and more ____, a reversal in the relative…

A: Geological Time depicts the geological history of Events on Earth that occurred in a specific time…

Q: Cartilaginous fishes made their first appearance in the fossil record between 444 and 419 MYA, which…

A: The biological time scale is defined as the framework used by biologists to analyse and understand…

Q: differetiate fossils and trace Fossils.

A: Fossils: - Fossils are mortal remains of the organisms who lived before. It means that the skeletons…

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: Define Cambrian explosion

A: The "Cambrian Explosion" contributes to the abrupt discovery of complex animals with sedimentary…

Q: Which of the following do not provide evidence that a meteor strike was a partial cause of the…

A: About 65.5 million  years ago KT extinction event occurred which wiped off the dinosaurs from the…

Q: List 5 examples of types of fossils

A: Fossils are the preserved dead remnants trapped in rocks or layers of soils of living organisms that…

Q: The “age of fishes”, which began with the Cambrian Period (about 541 million years ago), and ended…

A: The objective of the question is to identify the correct era that is also known as the 'age of…

Q: Feathers, which evolved from modified reptilian scales, show up in the fossil record at the end of…

A: Made from soft tissue, it is very rare to find the fossils of feathers as they cannot survive over a…

Q: Most of the ATP created during aerobic cellular respiration occurs along the cristae of the…

A: The aerobic cellular respiration involves oxidation of glucose to release energy in the form of ATP.…

Q: Why do we need to know the age of a fossil?

A: Fossil is preserved remains of any living things from the history such as bones,shells ,DNA remnants…

Q: Consider three important fossil SITES in Canada.   Name them.  Put them in order from the oldest to…

A: Fossil is defined as a preserved remains or imprint or tissues of the prehistoric organism. They are…

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.