Scientists are examining the possible role of a large asteroid in the cretaceous mass extinction event. A large asteroid strike would likely have caused rapid climate cooling and the diffusion of sunlight. which of the following statements are the best null and alternative hypotheses when scientists look at the geologic evidence of extinction related to the asteroid strike?

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: 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: 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: True or false: Adaptive radiation can itself set conditions for mass extinction

A: The question is asking whether adaptive radiation, a process in which organisms diversify rapidly…

Q: Let's say a 10 nucleotide DNA sequence differs by 5 nucleotides between 2 species  and fossil data…

A: The substitution rate equation is a formula used to calculate the rate of substitution per site per…

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

A: The evidence is given below.

Q: Which of the mass extinctions was the largest? What percentage of life went extinct during that…

A: Mass extinction is defined as the dis-appearance of a large scale of biodiversity (animals +plants…

Q: What does Oparin-Haldane Hypothesis assume about Earth’s primordial atmosphere? Why would this have…

A: Oparin-Haldane Hypothesis -Oparin-Haldane Hypothesis showed that how complex biological molecules…

Q: Choose True for yes and False for no, for each of the statements 1) The distribution of the two…

A: Given,          A,B,C species share a common ancestry but they are present in different places .And…

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: QUESTION 2 Approximately when did living things first appear on land? O 4.75 billion years ago O 3.5…

A: The age of the earth is estimated to be about 4.54 billion years. When the earth was formed for the…

Q: Q1. An adaptive radiation refers to:  a. speciation      b. convergent evolution          c.…

A: The process of evolution of different species in a given geographic area starting from a point and…

Q: Is your answer supported by the information from the article “Can Evolution outrace Climate Change”?…

A: Evolution is a very slow process compared to the speed of climate change. It is unlikely that…

Q: Which of these lists is in the correct order, starting at 550 mya to 50 mya: Cambrian explosion,…

A: The correct list is:Cambrian explosion, multicellular organisms first appear, radiation of reptiles,…

Q: List several significant events in the history of life on earth that are associated with the K-T…

A: KT boundary is the boundary between the age of reptiles that occurred in the Mezoxoic era and age of…

Q: and why? W

A: INTRODUCTION  Before long and many years, progressed space-and ground-based observatories will…

Q: The Andes are the longest continental mountain range in the planet and influence the biogeography of…

A: Allopatric speciation is the divergence of physically separate populations of a species, occupying…

Q: therefore, humans should immediately set a date for their relocation to Mars where, with proper…

A: Global warming has destroy earth by causing floods, earthquakes, heat waves etc., this lead to the…

Q: what is the difference between evolution and acclimation and how do they work with climate change?

A: Acclimation and evolution are the beneficial changes takes places in the organism . It allows…

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: 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: Which of the following mass extinctions caused the loss of over 80% of species and was due to…

A: Various mass extinction events that occurred in the history of the earth are- Ordovician-silurian…

Q: The largest mass extinction on record is the mass extinction event. O Late Permian O Late…

A: According to law of superposition within a sequence of layer of sedimentary rock the oldest layer is…

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…

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.