What changes in egg design allowed reptiles to lay egg on land?

Q: Why was the evolution of a coelom important?

A: Coelom is a fluid filled body cavity which is present between Alimentary Canal and Body Wall.

Q: Is the type and pattern of the cleave of an egg the same to all species of animals?

A: During the mitotic division, the cytoplasm of the egg is divided into multiple parts which then…

Q: Is scoliodon a shark?

A: Elasmobranchii is a subclass of cartilaginous fishes that have five to seven laterals to ventral…

Q: How is the development of a hookworm larva different from the development of a pinworm larva

A: Larva is a stage during the development of animals. It occurs after the birth and before the reach…

Q: Give the resemblances between the lancelet and the lamprey's larva?

A: The lancelet belongs to the kingdom Animalia and characterized as "fish-like" benthic filter-feeding…

Q: What are placental mammal ? Explain the role of  placental mammal ?

A: Placental mammals are a diverse group, with nearly 4000 species described, the majority of which are…

Q: How do  invertebrate chordates differ from vertebrate  chordates? Elaborate.

A: Introduction A Chordate Is A Member Of The Chordata Phylum. At Some Point During Their Larval Or…

Q: Which Animals Are Chordates?

A: Animals are multicellular eukaryotic organisms belonging to kingdom Animalia that are heterotrophic,…

Q: How are the vertebrates related?

A: Vertebrates refers to all the species of animals within the Subphylum Vertebrata. Subphylum…

Q: Difference between class reptiles and class aves?

A: Vertebrates comprise all species of animals within the sub-phylum Vertebrata. It comprises of animal…

Q: What genetic changes led to the increasing complexity of the arthropod body plan?

A: Answer- Arthropods are among the most adapted phyla on the planet. There are many factors…

Q: How is the large size of some cephalopods related to the type of circulatory system they present?

A: Mollusca is the largest marine phylum of the animal kingdom that is characterized by a mantle with a…

Q: describe the evolutionary advantage that the cleidoic egg provided to terrestrial organisms.

A: The Cleidoic egg is a form of egg inhabited with the useful resource of reptiles and birds. Replica…

Q: Is there a larval stage in echinoderms?

A: The term Echinodermata was coined by Jacob klein in 1738 . Leucport in 1847 established the…

Q: How do reptile eggs differ from amphibian eggs? Why is this important?

A: The egg is the female reproductive unit and it is produced by the oogenesis process. It is haploid…

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: What characteristics make a pig a chordate?

A: Chordate Chordates belong to the phylum Chordata. During some period of the life cycle of chordates,…

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: How can brachiopods be distinguished from bivalves?

A: Invertebrates are organisms in which backbone is absent . It includes :-  A ) Arthropods  B )…

Q: Under which environments do echinoderms live?

A: Echinoderms are the animals that have no terrestrial or freshwater representatives. Echinoderms…

Q: If snakes are limbless, how can they be consideredtetrapods?

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

Q: Why are robber crabs land invertebrates?

A: Robber crab which is also known as coconut crab, scientific name Birgus latro , it is a species of…

Q: Describe amniote adaptations to life on land

A: The group of multicellular and heterotrophic organisms belonging to the kingdom Animalia is called…

Q: how did bat wings evolve from arms?

A: Evolution is the process of change in the features of an organism with time. It is based on the…

Q: Which animal does not undergo metamorphosis?

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

Q: Which group of hadrosaurs had crests?

A: Hardradosaurids means bulky lizards. They were the family of herbivores dinasaurs. They were the…

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 is thought to be the function of the shell morphology in African pancake tortoise?

A: Introduction African pancake tortoises:- are native to East Africa and are found in Tanzania,…

Q: Which amniotes are endothermic? What are some advantages of endothermy?

A: An organism alludes to something living that has a coordinated design, can respond to boosts,…

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: What is a major difference in function of the coelom in holothurians compared with other…

A: The holothurians are commonly called sea cucumbers. They have one distinct feature which separates…

Q: What kind of arthropods are chiggers?

A: Chiggers are tiny mites that usually get their traits confused with the scabies mites. They are also…

Q: Which structure classifies an organism as a gnathostome? a lateral line system a mineralized bony…

A: structures which classify gnathostome are Jawed fishes comprising of mostly of 90% living…

Q: write a paragraph that discusses the evolution of viviparity in amniotes.

A: Introduction viviparity is the development of embryo inside body of parent. Amniotes lay egg on land…

Q: How did the following fish groups evolve? a) Agnatha b) Chondrichthyes c) Osteichthyes d)…

A: Although numerous fossil fishes have already been discovered and documented, they only represent a…

Q: having a post-anal tail and gill slits are traits of all embryos belonging to which phylum?

A: Pharyngeal slits are openings in the pharynx that develop into gill arches in the bony fish and into…

Q: Tetrapods evolved from_______ . a. sharks c. lobe-finned fishes b. teleosts d. placoderms

A: All extant and extinct creatures that evolved from the last single ancestor of amphibians, mammals,…

Q: Are snakes tetrapods? Explain.

A: Tetrapods includes land vertebrates with two pairs of pentadactyl limbs, cornified skin and lungs.…

Q: Describe how paedomorphosis as a mechanism could explain the evolution of the chordate body plan…

A: Explanation: Paedomorphosis is a mechanism that can explain the evolution of the chordate body plan.…

Q: Which of the derived characteristics came into existence before the bony shell?

A: Cladogram is a diagrammatic representation which correlates the evolutionary relationships among…

Q: How many years ago did amphibians appear?

A: The amphibians are ectothermic, tetrapod vertebrates of the class Amphibia. The different species…

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 characteristic defines a chordate who is also a vertebrate?

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

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: What is the role of elaborated cloaca in reptiles?

A: Reptiles are characterized by the presence of four limbs and uric acid as the nitrogenous waste…

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…