Which of the following groups of early-diverging animals is comprised of two layers of cells that float around in the ocean?   a. Cnidaria   b. The sponges   c. Ctenophores   d. Placozoa

Q: The phylogenetic tree of animals shows thata. rotifers are closely related to flatworms.b. both…

A: A phylogenetic tree is a diagram that tells about the evolutionary relationships among different…

Q: You discover a new species of animal that has a backbone running down the length of its body. What…

A: The Animal Kingdom is divided into 10 different Phyla. Each of these has some basic characteristics…

Q: Which of the following statements about bilaterian animals is false? A. Many bilaterians are…

A: Bilateral symmetry refers to body shaped species which are mirror copies of a midline called the…

Q: (a) State two advantages of cephalisation (b) Outline the advancement features of reptiles that…

A: Cephalization is the differentiation of the anterior end of an organism into a definite head. This…

Q: Stalked jellyfishes" belong to which class?    A. Staurozoa B. Scyphozoa C. Anthozoa D.Hydrozoa E.…

A: Stalked Jellyfishes are the sole living members of Class Staurozoa.

Q: Describe the following general characteristics can be used to distinguish among Animal phyla: a.…

A:

Q: To which of the following groups would a species that does not molt, possesses a coelom, and has a…

A: The process of molting refers to the method where one immature organism sheds hair, feathers,…

Q: Which arthropod class is the most diversified animal group of the planet? How can this evolutionary…

A: Arthropods have jointed appendages. They are characterized by wings and  3 pairs of legs.

Q: What type of data is primarily used to determine the existence and appearance of early animal…

A: Animals are multicellular eukaryotic organisms. They possess a well-defined growth pattern that…

Q: Phylum Chordata: (Made up of 3 subphyla, two of which lack a true backbone) 1. State the four…

A: Chordata is a vast class of animals that contains vertebrates as well as sea squirts and lancelets.…

Q: Which of the ff. has a repugnatorial gland and coils into a ball when disturbed? A. Diplopod B.…

A: Various species under the arthropoda phylum are classified under Myriapoda. These possess multiple…

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: Ctenophora Animals Porifera Placozoa Cnidaria Bilateria |Chanoflagellata What is true about the red…

A: The correct answer is-  d) it includes the most recent ancestor and all of its descendants

Q: Which of the following features do sponges lack that some other animals have? (a) segmented body…

A: 5 kingdom classifications is a type of classification in which living organisms are classified into…

Q: Both octopuses and cuttlefish have a single-lens eye. Their common ancestor also had a single-lens…

A: The anatomical structures include all the tissues and organs of our body. The various organs of the…

Q: 1. The first terrestrial vertebrates to evolve, with lungs, tetrapod limbs, and a three-chambered…

A: The geological time scale is divided into different era, periods and ephos. The evolution of…

Q: completely wraps the cavity is called: a) coelom b) pseudocoelom c) acoelom d) Archenteron e)…

A: 5th answer is b

Q: A mantle and mantle cavity are present in _____. a. class Oligochaeta b. class Bivalvia c. class…

A: The animal kingdom is separated into several phyla due to the different anatomical and physiological…

Q: You read a research article presentsing new phylogenetic data demonstrating that species that…

A: Answer- Correct option is (A) Evolution of the pseudocoelom occurred more than once.

Q: Which group of crustaceans has all of these attributes: - sessile, strongly attached to substrates…

A: Introduction Any member of the Crustacea subphylum (phylum Arthropoda), a collection of invertebrate…

Q: Which group of echinoderms usually posses pentameric antimeres but some species may have more? A.…

A: Echinodermate's term was coined by J. Klein. These are exclusively marine organisms falling in the…

Q: The jacobson's organ is to organisms in _____________________ as the lateral line is to organisms in…

A: Jacobson's organ is an Olfactory organ which is present in squamates (scaled reptiles like snake,…

Q: While studying the embryonic development of an organism, you determine that the blastopore of the…

A: The blastopore is formed during the primary stages of gastrulation. The blastopore forms the mouth…

Q: Which of the following statements regarding the diversification of animals is supported by the…

A: Biodiversity improves ecosystem productivity by allowing each species, no matter how little, to play…

Q: Brachiopoda 1. А Testudines 2. B Osteichythes 3. С Aves 4. D Myxinoidea 5. E 6. F Rotifera 7. G…

A: The study of links between various groups of species and their evolutionary development is known as…

Q: A mantle and mantle cavity are present in: a. phylum Echinodermata. b. phylum Adversoidea. c. phylum…

A: The animals that lack backbone or ‘vertebral column, are called the ‘Invertebrates’. The group…

Q: Sponges A Cnidarians Ancestral colonial protist Flatworms Molluscs B Annelids Nematodes E Arthropods…

A: Tissue is a collection of cells with similar structures that work collectively as a unit.

Q: You are a Triassic dinosaur. Which of the following would you have been able to do?

A: The Triassic period was a time of enhancement of land plants in which ferns were transcendent…

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: The genus Sinitrofulgur includes whelk species that prey on Mercenaria bivalves. Which statement…

A: The correct answer to this problem would be:- D• The Sinitrifulgur specimens featured cracks in…

Q: What is true about organisms that are a part of the same clade? a. They all share the same basic…

A: The term ‘clade’ was coined in 1957 by the biologist Julian Huxley to refer to the result of…

Q: Which of the following statements is NOT true regarding protostome diversity?   A. Of the 30…

A: Blastopore is the opening of the archenteron on the surface of an embryo in the gastrula stage of…

Q: There is current controversy about which group is sister to the rest of the animals. Which two of…

A: The animals are those organisms who are made up of animal cells. They don't have cell wall around…

Q: If you were to build a phylogenetic tree of living animals, which of the following derived…

A: Introduction :- Deuterostomes are an animal clade that undergoes deuterostomy during embryonic…

Q: Which of the following is an example of an animal that has true tissues, has a coelom, is…

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

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: An animal whose development is marked by radial cleavage and enterocoely is ________. a. a…

A: Kingdom Animalia contains all animals. It is the largest kingdom of Animalia as compared to other…

Q: 4. The first aquatic vertebrates to evolve, with a cranium and a vertebral column, but no jaws…

A: The evolution of fish began about 530 million years ago during the Cambrian explosion. It was during…

Q: Which of the following does NOT ALWAYS describe ecdysozoans?    a. They exhibit bilateral symmetry.…

A: The Ecdysozoa is a superphylum that consists of nematodes and arthropods making it one of the…

Q: 1. Large colonies of polyps belonging to class Anthrozoa secrete hard skeletons of time which later…

A: Introduction  In biology, symmetry refers to the ordered repetition of parts in a living organism.…

Q: factor in the rapid speciation of animals seen during this time. What findings in the fossil record…

A:

Q: In Figure 33.2, which two main clades branch from the mostrecent common ancestor of the…

A: A clade is a monophyletic group that consists of a common ancestor and all its species that have…

Q: In your garden you find a segmented animal with jointed legs. It has a distinct head capsule but the…

A: The tracheal system is the airway  which lead from larynx to bronchi.

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.