According to the fossil record, what did the common ancestors of modern whales and dolphins look like?

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

A:

Q: what percentage of sea turtles were around during the jurassic period?

A: Introduction : Geological time scale gives a picture of the events which has taken place in the…

Q: Who gave the scientific name homo sapiens to man?

A: The species that we and all other living human beings on this planet belong to is Homo sapiens. Homo…

Q: Do these animals share any structural similarities inside their wings that would suggest they are…

A: The analogous structures are found in the organisms that have evolved through different paths. There…

Q: What was more important for the invasion of the land by vertebrates during the Paleozoic: becoming…

A: Vertebrates are those animals that are characterized by the presence of well distinguished backbone…

Q: what can we learn by studying fossils?

A: Fossils are the preserved remains or traces of living organisms that lived in past. Fossils are…

Q: Is it true that Is it unlikely that anatomically modern humans interbred with premodern groups as…

A: Hominin – the group consisting of modern humans, extinct human species and all our immediate…

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: Did the Neanderthals and Denisovans mate with each other before their lineages died out?

A: The modern human species known as Homo sapiens evolved about 315,000 years ago in the African…

Q: What problems were associated with colonizing land during the evolution of vertebrates?

A: Life on Earth first developed in quite a while over 3.5 billion years prior, and even today most of…

Q: Why would you expect a hybrid of Neanderthals and modern humans to have intermediate features?

A: Neanderthal is a group of archaic humans that went extinct around 40,000 years ago. While modern…

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: Neanderthals and Denisovans split approximately 530,000 years ago. 430,000 years ago. 400,00 years…

A: Answer is 3rd option

Q: From the early 1700s to the modern day, how did various lines of evidence clarify and improve…

A: Cetaceans are the true aquatic mammals that have evolved mechanisms to survive in the water.…

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: What does hindlimb shape say about the ancestry of dolphins and other cetaceans?

A: One of the orders of Mammals is Cetaceans that had originated about 50 mya in Eocene epoch. This…

Q: Why don't paleoanthropologists use C-14 dating to understand when early hominins lived?

A: Carbon-14 dating, often known as radiocarbon dating, is a method of determining age based on the…

Q: When North America and South America joined due to continental drift, what may have caused the North…

A: Continental drift is a hypothesis according to which continents on Earth have moved over geologic…

Q: What caused the extinction of the dinosaurs?

A: Dinosaurs represent the giant reptiles that evolved on earth 245 million years ago. They come under…

Q: How do we know the age of a fossil?

A: The change in the heritable characteristics of the species across many generations is called…

Q: which modern humans had already spread out through much of Asia?

A: It is believed that the most dominant and intelligent species on earth are humans. They are…

Q: What does the nostril position say about the ancestry of dolphins and other cetaceans.

A: Cetaceans are aquatic marine mammals.  In this group it contains dolphins and whales. they are…

Q: How might we know what the common ancestor of frogs and humans may have been? Where could we look…

A: Similarities in characters of two organisms definitely suggest that they had some common ancestor…

Q: According to the fossil record, which of these species is the earliest of the Homo genus? a. H.…

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

Q: Were the homo neanderthalensis the first to make blade tools?

A: Homo neanderthalensis are the extinct species closest to Homo sapiens. The defining features of this…

Q: what were the earliest members of the genus Homo?

A: Human evolution is the evolutionary path that led to the development of anatomically modern humans,…

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: Looking at the skulls, can you determine which is a direct ancestor and which is a ‘cousin’?

A: The skull is a bony structure that forms the head in vertebrates. It supports the structures of the…

Q: HOW MANY YEARS AGO DID THE DINOSAURS BECOME EXTINCT?

A: A timeline based on the rock record of the earth is called a geologic time scale (GTS). It is a…

Q: What term did Lamarck use to explain how new species emerged

A: Jean-Baptiste Lamrack was a French naturalist, who believed if the body parts were not being used,…

Q: How many anatomical characteristics do cetaceans share with mammals and fish?

A: Introduction: Those vertebrates that have a memory gland and give birth to the young ones instead of…

Q: Explain if cetaceans evolved through change over time from ancestral mammal that lived on land.

A: Cetaceans are aquatic marine mammals like the species of whales and dolphins. They belong to the…

Q: isa Nhich of the animals represents the oldest creatures in terms of evolutionary history?

A: Evolution is the process of changes in the characteristics of a species over many generations and…

Q: What is the difference between an ancestral character and a shared derived character?

A: Systematics is used to construct a cladogram, which is an evolutionary tree, which depicts the…

Q: What is a transitional fossil?

A: Fossils are the preserved remains or remains from a once-living organism from a particular…

Q: Did gene flow occur between Neanderthalsand humans?

A: Gene flow is a natural process of transfer of genes and alleles from one population to another. Gene…

Q: why do prehistoric remains consist of almost inclusively of bones and teeth?

A: It is generally found that the prehistoric times mainly comprise of harder body parts like bones and…

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: What are three things a fossil can tell you about an animal?

A: Introduction A fossil is a remnant of a non-living plant or animal that has been preserved or…

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: 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: 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: Fossil records had given scientists a glimpse of the past, to what extent these fossil records…

A: Fossils are the preserved remains or traces of animals, plants, and other organisms from the past.…

Q: In a comparison of birds and mammals,the condition of having four limbs is(A) a shared ancestral…

A: Two or more organisms are recalled homologous if they have the common ancestor. The organisms that…

Q: When did the different species of Homo appear and how did their cultures differ?

A:

Q: Are bird wings and the wings of bats (evolved from limbs) an example of an evolutionary homology or…

A: Homology means the organs that are evolved from the same point of origin but have evolved different…

Q: What contributed to the natural selection of the finches' beaks?

A: Darwinism is a theory of biological evolution proposed by Charles Darwin (1809–1882) and others,…

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.