Lobe-finned fishes are important because theya. were the first vertebrates.b. were the earliest animals.c. are closely related to tetrapods.d. lack jaws

Q: The first vertebrates to evolve werea. amphibians.                   d. amniotes.b. jawed fishes.…

A: Vertebrates radiated in the late Ordovician period. It was about 450 million years ago.

Q: A major difference between birds and other reptiles is that birdsa. produce a shelled egg. d. care…

A: The group of heterotrophic, multicellular, and eukaryotic organisms that do not show the presence of…

Q: A swim bladder is a gas-filled sac that helps fish maintainbuoyancy. The evolution of the swim…

A: Introduction Fishes lives in aquatic environment where there is low availability of Oxygen in water.…

Q: Describe the major vertebrate adaptations that arose in fishes andwere adaptive on land.

A: Vertebrates are the next subcategory of chordates. These organisms are characterized by the presence…

Q: Explain how vertebrates are distinguished from invertebrates.

A:

Q: A marine biologist catches a species of fish she has never seen before. Upon examination, she…

A: Pisces is a class that contains fishes. The members of pisces have two chambered heart with one…

Q: Whale skeletons contain nonfunctional pelvic bonesa. as a result of convergent evolution.b. due to…

A: Bizzare behind pelvic bones:                         For decades, scientist predicts that the pelvic…

Q: Amphibians evolved from what type of ancestral fish?a. sea squirts and lancelets                  d.…

A: Amphibians can be defined as the ectothermic, tetrapod vertebrates belongs to the class Amphibia.…

Q: In the Paleozoic era, the first vertebrates to live on land were thea. amphibians.b. reptiles.c.…

A: The Paleozoic era is the earliest of three major geologic eras found in geologic periods which…

Q: Urochordates, instead of amphioxus, are now considered the sister group of vertebrates. Why is…

A: Urochordates are monophyletic and belong to Vertebrata. The tadpole larva shows the morphology of…

Q: ___________ were an early group of humans with short, sturdy builds and heavy supraorbital ridges…

A: Answer is d.) Neandertals.

Q: Australopiths are_______ . a. a type of monkey c. extinct hominins b. wet-nosed primates d.…

A: Australopiths belong from Australopithecus, which evolve from 4.18 to about 2 million years ago

Q: Chordates are named for having this generalized structure. A. Spinal cord B. Stomochord C. Notochord…

A: The chordates is an advanced group in the animal kingdom. The chordates include cyclostome,…

Q: Monotremes are very primitive mammals because: O a. They lay eggs. O b. They do not provide milk to…

A:

Q: 1. Today's lungfishes in the Amazon rain forest do not have lobefins, but nevertheless are regarded…

A: Note: Please post other questions separately. Answer: 1. Introduction: Amazon is one of the greatest…

Q: id the transition of vertebrates from water to land happen quickly? Explain

A: The ecological eras are studied concerning evolutionary time. The time taken for the evolution shows…

Q: Unlike bony fishes, amphibians havea. ears. b. jaws. c. a circulatory system.d. a heart.

A: The group of eukaryotic organisms that are heterotrophic and multicellular is called animals. There…

Q: Amphibians evolved from which type of ancestral fish?a. sea squirts and lanceletsb. ray-finned…

A: Amphibians evolved from lobe finned fishes as ancestral fish.

Q: Segmentation, first seen in annelids, allows evolutionary advantages bya. allowing more fluid…

A: The segmented body is the most noticeable of the annelid phylum's identifying characteristics. The…

Q: Which clade does not include frogs?a. vertebrates b. gnathostomesc. tetrapods d. amniotes e. lobe…

A: A clade is a group of organisms that have a common ancestor. Frogs belong to the amphibians and are…

Q: Unlike Archaeopteryx, modern birds have_______ . a. a long bony tail c. a two-chambered heart b. a…

A: The oldest known fossil bird is Archaeopteryx, which dates from the late Jurassic period. It…

Q: how many million years ago did amphibians appear?

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

Q: Some amphibians never leave the water, whereasothers can survive in relatively dry terrestrial…

A: Amphibians are living organisms that can survive both in water and on land. The common examples are…

Q: On a research expedition to the Galapagos, you and your research team discover four new species! All…

A: Chordates are the phylum in animal kingdom.  Phylogeny represents the evolutionary relationship…

Q: The earliest-diverging gnathostomes (jawed vertebrates) were fish. Which one of the following…

A: Jaws, in fishes, are developed from the pharyngeal arches, which play a major role in protection of…

Q: Scientists used to think that all dinosaurs were large and slow-moving. Which discovery overturned…

A: Fossils of pterosaurs confirmed that these reptiles had hollow bone and wings: One of the most…

Q: Vertebrates and tunicates share(A) jaws adapted for feeding.(B) a high degree of cephalization.(C)…

A: Chordata is the largest phylum of subdivision- Deuterostomia. It was created by Balfour in 1880.…

Q: vertebrate

A: Introduction  The regenerative conduct of  vertebrate  is surprisingly differentiated: they might be…

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: ambulacral grooves are present in which animals below? a. a unified skeleton b. no madreporite…

A: Ambulacral grooves are usually found in the starfish which is filled with fluids and contains…

Q: Hagfish, lampreys, sharks, and tuna are all chordates that can also be classified into which group?…

A: All chordates have endoskeleton with a backbone for the support of dorsal nerve cord and muscle…

Q: Which of the following groups of early-diverging animals is comprised of two layers of cells that…

A: Introduction Divergent evolution:- It refers to the process by which interbreeding species diverged…

Q: A.) what were some of the challenges reptiles faced? B.) and how did they overcome those…

A: As the life evolved from amphibians to reptiles the various challenges faced were.. The terrestrial…

Q: Which of the following could be considered the most recentcommon ancestor of living tetrapods?(A) a…

A: The term “tetrapods” means “four feet”. The tetrapods are the animals that belong to the superclass…

Q: The oldest body fossils of a land animal are of_____ .a. insects c. cnidariansb. roundworms d.…

A:

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: Sharks are chordates that possess which of the following Group of answer choices jaws an air sac…

A: Chordata has a place in the Kingdom Animalia and incorporates every one of the vertebrates, i.e.,…

Q: Archaeopteryx is a significant fossil find because it gave hints to the evolution of the following…

A: Fossils refer to remains or traces of past life preserved through natural processes. Imprints,…

Q: Match the benefit to the correct chordate adaptation. (match each number to the correct letter)…

A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…

Q: The largest group of vertebrates would De the birds. mammals. osteichthyans. insects. DO00

A: Vertebrates is a group of chordates with a well developed vertebral column. In this group, the…

Q: Arrange the groups in order in which they evolved. ___ 1 (earliest)           a. Jawless fishes ___…

A: The marine ecosystem is defined as the largest aquatic environment with high levels of salt in the…

Q: Cephalopods have complex eyes that arose separately from vertebrate eyes that are also used in…

A: Answer:-  Cephalopods vision system is very complex systems like in vertebrate .  And the eye…

Q: Living vertebrates can be divided into two majorclades. Select the appropriate pair.(A) the…

A: Chordates are characterised by the presence of notochord. They can be classified into vertebrates…

Q: Scientists collectively call humans and their immediate ancestors (a) mammals (b) primates (c)…

A: Humans are classified as part of the Tribe Hominini, which includes modern-day Homo sapiens as well…

Q: Members of Chondrichthyes are thought to be descended from fishes that had ________. a. a…

A: Sharks, rays, and skate, as well as sawfishes and a few handful fish species known as chimaeras, or…

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: A bird or feathered dinosaur is ________. a. Neornithes b. Archaeopteryx c. Enantiornithes d.…

A: Dinosaurs that have feathers on their body are known as feathered dinosaurs. This species of…

Q: Describe how turtle anatomy has changed over time.

A: Changes in turtle anatomy over years: - Loss of teeth in recent species.

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 Phylogeny

Cladistics is a method of biological classification where organisms are classified based on their ancestors and their relationship with them. It is defined as the concepts and methods for determining the branching patterns of evolution and evolutionary history. Some scientists, however, have preferred the term phylogenetic systematics or phylogenetic taxonomy to emphasize the reliance on a phylogeny for classification. It is the most common and accepted method for classifying organisms.