How many years ago did amphibians appear?

Q: To what order do primitive mammals that lay eggs belong? A. Marsupials B. Craniata

A: The process through which an organism produces more of its own offspring is known as reproduction.…

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: What were the adaptations that improved the ability of each of the following groups to survive on…

A: An adaptation is a modification of an organism, that makes the organism is more stable for…

Q: What adaptation did lobe- finned fish have that was different than the previous organisms? A. lobes…

A: Introduction  Fish are aquatic vertebrates that lack limbs with digits, such as fingers or toes, but…

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: Do amphibians have amniotic eggs?

A: No amphibians does not have amniotic eggs.

Q: What evidence is there that dinosaurs brooded their eggs and tended their young long after they…

A: Dinosaurs are an assorted gathering of reptiles of the clade Dinosaurian. They initially showed up…

Q: Why are the lung fish considered to have a common ancestor with amphibians

A: Rhipidistian freshwater fish belonging to the Dipnoi subclass are lungfish. Lungfish are best…

Q: Dinosaurs represent one of the oldest groups of animals

A: In this question, we have to explain the dinosaurs belongs one of the oldest group of animals.

Q: Describe what happened to the dinosaurs.

A: Dinosaurs were the ancient organisms that live on the Earth 66 million years ago. It has been…

Q: What is the evolutionary relationship of Neanderthals to Homo sapiens?

A: While a modern human who lived about 40,000 years ago was found to have about 6-9 percent…

Q: What structures did amphibians develop to support the weight of the body against the force of…

A: Amphibians, as their name indicates, are class of organisms that  have adaptations suited for both…

Q: Do all chordates have backbones?

A: Chordates having following characters: Presence of dorsal hollow nerve cord. Presence of notochord.…

Q: List the characteristics that evolved in amphibians to be able to live on land.

A: Amphibia is a class of vertebrates which spend some part of their life cycle on the land and the…

Q: Identify the geologic era and periods in which chordatesand the first vertebrates appear.

A: The chordates are first found in cambrian period which is 530 million years ago

Q: What are the features of a typical amphibian?

A: they are the vertebrates they live on both land and water they came into existence in the Devonian…

Q: All vertebrates are chordates but all chordates are not vertebrate? Justify the statement?

A: Chordates are those animals that have rod like notochord.In some chordates, the notochord is…

Q: What advantages might amphibians gain from their “double life”?

A: Amphibians are vertebrates that can inhabit both terrestrial and aquatic environments. This term is…

Q: animals found in cooler environments?

A: Several scientists are attempting to figure out however the Arctic ground squirrel (Spermophilus…

Q: Which animal does not undergo metamorphosis?

A: Metamorphosis is a biological process in which an animal goes through various continuous physical…

Q: Amphibians were the first _________, four-footed terrestrial vertebrates.

A: The organisms of the ecosystem have significant properties. Depending upon the different features of…

Q: What physical traits made scientist  believe that neanderthals adapted to the cold of the Ice Age in…

A: Neanderthals (Homo sapiens neanderthalensis) are the group of humans that emerged during the…

Q: What traits or innovations allowed movement of animals onto land, and why might these traits have…

A: Physical or behavioural adaptations are possible. A physical adaptation is a form of structural…

Q: Hadrosaur is May have been the only _____ dinosaurs

A: Step 1 The Mesozoic era had witnessed both rise and fall of reptiles. A large number of ruling…

Q: Which period is known as “Age of amphibians”?

A: Amphibians are the first animal to attempt transition from aquatic to Terrestrial life. From…

Q: how many million years ago did amphibians appear?

A: Amphibians are cold-blooded vertebrate tetrapods. The class amphibia comprises frogs, caecilians,…

Q: Why are external skeletons important for soft-bodied invertebrates?

A: Skeleton is the robust structure exhibited in the organism which act as scaffold for the body.…

Q: What group of animals is thought to have moved onto land to become the first amphibians?

A: Frogs, turtles, toads, skinks, and caecilians are all members of the class of cold-blooded…

Q: Compared to amphibianswhat are the two reproductivenovelties of beings of the classReptilia for the…

A: The reptiles are the vertebrates that are included in the tetrapod groups. The reptiles adapt…

Q: Basilosaurus was a fully aquatic ancient whale species that had vestigial _____________________…

A: Basilosaurus belongs to kingdom animal, phylum Chordata, class Mammalia, order artiodactyla, family…

Q: List the order in which the major types of animals appeared on Earth

A: Animals are the living organisms that able to move where as the plants are the category of organisms…

Q: How do amphibians undergo metamorphosis

A: Metamorphosis in amphibians is the transformation of the larva to a miniature adult replicate, and…

Q: Do amphibians have directdevelopment?

A: Development process involves the growth of a multicellular organism and also increases the…

Q: How are marine reptiles and marine birds similar?

A: Reptiles and birds are known to reside on land, but over time they have developed specific traits…

Q: What are the differences between vertebrates and the other chordates?

A: Organisms are divided into two categories- Vertebrates and Chordates. Vertebrates have vertebral…

Q: Which is the vertebrateclass that is considered thefirst entirely terrestrial?

A: The animal kingdom is divided into two phyla- Chordata and non-chordata. The phylum Chordata…

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: How would you distinguish pelycosaurs, early therapsids, cynodonts and mammals?

A: Answer of the question given below...

Q: In what present-day country was the oldest known fossil of a primate found?

A: Fossils are the traces, remnants or impressions of an organism of past geologic ages that has been…

Q: What is present on the feet of birds which provides more evidence for their evolution from reptiles…

A: Archaeopteryx lithographica is one of the first birds that is considered as the missing link between…

Q: What is dinosaur

A: Introduction  Reptiles are animals belonging to the Reptilia class, a paraphyletic grouping that…

Q: During what era did the dinosaurs become extinct.

A: In evolution, geological time scale is used to identify the evolution of different animals. It uses…

Q: Prestosuchus chiniquensis was a predatory animal from the Triassic Period most closely related to…

A: Prestosuchus is a wiped out ( extinct) family of pseudosuchian in the group Loricata, which…

Q: what are three bones that allows frogs to live on land

A: Two bones in the lower Limbs of frog tibia and fibula.

Q: In what ways were therapsids adaptively superior to the amphibians and reptiles that preceded them?

A: Therapsids are the ancestors of present-day mammals and their related ancestors. They represent an…

Q: which is the sister group of vertebrates?

A: All fishes, amphibians, reptiles, birds, and mammals are classified as vertebrates. These animals…

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.