With evolution and multicellularity in mind, list two characteristics that may have been common to the first animals.

Q: Birds are supposed to be the dinosaurs' closest relatives. List and explain five reasons why the…

A: Feathers, toothless beaked jaws, the laying of hard-shelled eggs, a rapid metabolic rate, a…

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: Draw your interpretation of what you think this fossilized Dinosaur would look like in real life.

A: Here is an image of a fossilized dinosaur. It is required to predict what this dinosaur would look…

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: Explain how vertebrate evolution was led by cephalization, jaw development, and paired limbs. To…

A: The evolution of jaws has had a substantial impact on the evolution of vertebrate history. There is…

Q: Organisms that are closely related may also have physical similarities before they are even born!…

A: Embryology The field of science that investigates the creation, growth, and development of embryos…

Q: A standardized classification system based on evolutionary trends and relationships was established…

A: STANDARDIZED CLASSIFICATION SYSTEM is the classification system of organisms worldwide based on…

Q: Compare and contrast the views of animal evolution based on body plan characteristics to those based…

A: When the anatomical or physical traits are considered for the determination of evolution then the…

Q: modern organism is most closely related, evolutionarily, to the Megalodon.

A: Megalodon is no longer living; it died out about 3.5 million years ago. Megalodon (Carcharocles…

Q: Approx how many mass extinction events occurred throughout the evolutionary history of animals

A: Biodiversity is the diversity of biological life forms present in three forms of genetic,…

Q: While hiking through the desert of New Mexico, the Smith family found a fish fossil. They thought it…

A: During the evolutionary period ;there are sudden  climatic changes that takes place in the…

Q: Morphological analogs are structures having similar functions but different origins.  For example,…

A: Through evolution plants and animals have altered their forms, behavior, and movement. These changes…

Q: No one knows exactly when or how the first living organisms evolved, but we know that life existed…

A: Just as the universe is believed to have been formed due to the occurrence of the 'Big Bang', the…

Q: An organism has a streamlined body, fins, and scales. To which vertebrate group does it belong? O…

A: The presence of gills throughout the life cycle is a basic criteria for an animal to be classified…

Q: Morphological analogs are structures having similar functions but different origins. For example,…

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

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: describe the evolutionary history of humans and the factorsthat may have fostered humans’…

A: I Human Evolution is Studied along with the Evolution of Apes because they are Closely Related To…

Q: According to the current hypothesis, when did most major groups of animals evolve?

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

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: List the criteria used to distinguish: (a) animals from other organisms; (b) vertebrates from…

A: Ans: The criteria used to compare and differentiate different living systems as mentioned in the…

Q: Professor Andrew, a paleontologist discovers a transitional fossil between a stem amniote and…

A: Fossils are the preserved remains or traces of organisms (plants, animals, etc.) from the past.…

Q: If evolution was true, we should expect to see fossils of animals that bridge the gaps between two…

A: The phenomenon of evolution of a population to form distinct species is called speciation. A group…

Q: Using the following terms, explain what classifications and groups humans fall into, from the most…

A: R. H. Whitaker’s classification system categorizes organisms into five major groups. These groups…

Q: Describe why primitive animals are primarily marine

A: The first life on Earth was observed in water, billions of years ago. Primitive organisms are the…

Q: Your age-dating put the age of the rocks you are examining in the early Devonian period. Because of…

A: A phylogeny is a hypothetical relationship between groups of animals that are represented by a…

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: What type of evolution do vertebrates have? (Parallel, Convergent, or Divergent)

A: Evolution is the study of relationship between different organisms.

Q: the five classes of vertebrates  are

A: Vertebrates can be defined as the type of organisms which consists of the spinal cord protected by…

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: If you discovered a fossil bird with scales on the body & teeth in the beak. What would…

A: Fossils are any preserved remains, impression, or trace of any once-living thing from a past…

Q: Below are some key events that took place during the long history of life on Earth. Arrange them in…

A: Constant change has characterized earth since its beginning some 4.5 billion years ago. life…

Q: List 10 modern-day animals and using the internet resources link it to a corresponding ancient…

A: Animals are multicellular eukaryotic organisms that from the biological kingdom Animalia. With few…

Q: Which position would indicate an organism with a bony skeleton? Which position would indicate the…

A: Question - 1- Which position would indicate an organism with a bony skeleton? Question - 2 - Which…

Q: a. What is Type I and Type II embryogenesis? When did they evolve? Compare the two and give an…

A: Answer :: a)   In developmental biology, the development of an animal or plant embryo is embryonic…

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: 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: Discuss the origin of modern humans.

A: Introduction Evolution is the key process that regulates the survivability and continuity of species…

Q: Fossils show that dinosaurs originated between 200 and 250 million  years ago. Would you expect the…

A: Earth is divided into land part and ocean part. A huge large chunk of land is present later around…

Q: What sorts of data lead Richard Owen to propose that organisms were designed according to an…

A: Richard Owen was a naturalist and the biologist  explained the nature of evolution before the…

Q: Discuss Evolution of Animal Kingdom.

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

Q: Name three types of animals that existed during the mesozoic era

A: More than 180 million years passed through the Mesozoic Era. Many modern plants, invertebrates, and…

Q: Please explain the evolution of humans in the simplest of terms. Starting from a single cell…

A: Evolution It refers to the change in the heritable traits present in organisms over the generations.…

Q: Name one fish like reptile that evolved from land reptile about 200 million years ago?

A: Evolution is an orderly change from one condition to another that are favourable for an individual…

Q: WRITE ABOUT A THEME: ORGANIZATION Early tetrapodshad a sprawling gait (like that of a lizard): As…

A: Breathing provides oxygen and nutrients to all the tissues and organs. For the continuity of…

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…

Q: Until recent discoveries suggested otherwise, animals existing before the Cambrian period were…

A: Cambrian explosion took place nearly 541 million years ago in the Cambrian period. Fossil records…

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.