What are the hypotheses used to trace early evolution of animals?

Q: Describe the evolutionary changes that had to occur to go from a Osteichthyes to a mammal. What were…

A: Evolution is a phenomenon that occurs in the environment as a result of hereditary changes and…

Q: Describe four shared derived characters of vertebrates.

A: Vertebrates are members from the subphylum Vertebrata, under the phylum Chordata and under the realm…

Q: . When during the history of life did vertebrates evolve?

A: Earliest Vertebrates evolved 550 million years ago.

Q: describe fossil evidence of the earliest multicellular organisms and the earliest animals?

A: The fossils can be defined as the organisms that lived in the past and are not found today. They are…

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: What are the general characteristics of animals in each era: Cenozoic, Mesozoic, and Paleozoic?

A: Definition with example of blood groups Parents pass on traits or characteristics, such as eye…

Q: In what ways do the genera Australopithecus and Homo differ?

A: Genetic evidence showed that about 7-10 million years ago, humans were evolved from chimpanzees. The…

Q: What are the key events in the evolution of the animals?

A: Evolution can be defined as the change in the characteristics of species over several generations…

Q: How did the origin of jaws, lungs, limbs, and the amnion affect thecourse of vertebrate evolution?

A: A vertebrate is an animal that has a backbone and a skeleton. Human beings are part of this…

Q: How Long Might Neanderthals Have Co-Existed withModern Humans (Homo sapiens)?

A: homo sapiens and neanderthals shared common ancestry 0.5 million years ago and somewhere a split…

Q: What is the correct order of appearance in the fossil record, starting with the earliest: reptiles,…

A: Vertebrates comprise mammals, birds, reptiles, amphibians, and fish, a widely recognized category of…

Q: What type of data is primarily used to determine the existence and appearance of early animal…

A: Animals are multicellular eukaryotic organisms. They possess a well-defined growth pattern that…

Q: Tiktaalik and Protarchaeopteryx are examples of transitional forms. In paleontology, what does…

A: Paleontology, usually spelled palaeontology or palaeontology, is the scientific study of life…

Q: Are the limbs modified into wings of bats and the wings of birds examples of evolutionary analogy or…

A: Homologous organs are defined as the organs of different species that are having a similar structure…

Q: What are the six criteria used to build a complete evolutionary branch of vertebrates?

A: The earliest vertebrates were jaw less fish which lived between 500 and 600 mya. They had a cranium…

Q: What are the general reasons of animals' existence in each era: Cenozoic, Mesozoic, and Paleozoic?

A: Geological time scale: It is a time period used to measure the time or age of the earth by seeing…

Q: What is the study of fossils called? Mention any three points how the fossils throw light on past…

A: Fossils are the naturally preserved remains or traces of animals or plants that lived in the…

Q: Explain how cephalization, jaw development, and paired limbs guided vertebrate evolution. Include…

A: Evolution is a slow process of changes in species on the genotypic and phenotypic level that leads…

Q: Explain the Evolutionary Trends Among Animals ?

A: Evolutionary Trend is defined as a steady evolution of trait in a given adaptive direction in…

Q: What would have happened to major vertebrate groups if urinary and reproductive went on to evolved…

A: Urogenital system in vertebrates are organs related to fertility and urination. The reproductive…

Q: List three characteristics that distinguish Homo sapiens from premodern Homo Homo sapiens have a…

A: Scientific data gathered on human evolution suggests that the physical as well as behavioral…

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: If Lamarck and Darwin had debated why giraffes have such long necks, how would their explanations…

A: Evolution is a steady ( gradual) phenomenon which cause transformation of life from simple to…

Q: List the three kinds of specific evidence that help us to discover the history of animal life.

A: Evidences that help us to discover history of animal life  1 Anatomy 2 Molecular biology 3…

Q: Does vertebrates evolved from a common ancestor? Exlain your answer.

A: The vertebrates include humans and all other backboned species, as well as a handful that has no…

Q: Can fossils bridge the evolutionary gap between fish and tetrapod vertebrates?

A: Phylogeny is the branch of biology that studies phylogenetic analysis. A phylogenetic analysis is…

Q: What is the probable evolutionary sequence of the following clades (groups) of animals, from…

A: To find  What is the probable evolutionary sequence of the following clades of animals from the…

Q: How and why did sponges develop skeletons, given that they were the first animals, there were no…

A: Sponges are the simplest form of multi-cellular organisms with structural complexities. They have…

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: Which well-known group is ancestral to all living birds? What evidence in the fossil record supports…

A: Fossils are the prime pieces of evidence of evolution. It includes the remnants or impressions of…

Q: What species of hominins other than the Neanderthals may have commingled with modern humans?

A: Hominin, the term is used to refer to extinct members of the human lineage, most of which are quite…

Q: are birds such as cassowaries and ostriches the closest links we have to velociraptor dinosaurs or…

A: Aves is the name of other class which birds belong and its its forelimbs are modified into wings .…

Q: What valuable information can an archaeologist gain from understanding the connections between…

A: Archeology gives us the chance to find about past culture through the investigation of artifacts,…

Q: How do we come to understand the place of vertebrates in a broader tree that includes all animals?

A: The relationship between different organisms based on their evolutionary descent is depicted through…

Q: What are the largest animals ever to have lived on Earth? From what animals are they thought to have…

A: The branch of biology that deals with the structure, function and evolution is called zoology. It…

Q: List three groups of adaptations that guided vertebrate evolution, and explain how each has…

A: Introduction  Adaptation are the changes in the physical and behavioural characteristics which helps…

Q: Based on anatomy, fossil, embryos, and DNA what are the closest living relatives of cetaceans, fish…

A: Cetacean, any member of a completely aquatic cluster of mammals usually referred to as whales,…

Q: How is it that most, if not all, of the extant animal phyla today evolved during the Cambrian period…

A: To date, there has been no other evolutionary explosion as strong as the Cambrian period in the…

Q: According to Matthew Baron, the only group of dinosaurs that was composed entirely of…

A: Triassic Period was the first period of the Mesozoic Era and during which the first dinosaurs…

Q: What types of molecular and morphological changes occurred along the different branches that led to…

A: Answer: Introduction: Tetrapods (means four limbs) evolved from a group of animals called as the…

Q: What patterns in the fossil record would support that organisms have evolved?

A: Fossils: Fossils are considered to be the remains or the traces of the organism's activity that are…

Q: How could morphological data alone lead biologists to group animals into erroneous evolutionary…

A: The evolutionary relationship between the different organisms is shown by the phylogenetic tree. How…

Q: Put the following milestones in animal evolution in orderfrom oldest to most recent: (a) origin of…

A: The origin of life or abiogenesis states about the simple life forms that are risen from the…

Animal Diversity

Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.

Platyhelminthes

Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.