16 serial repetition of segments is a defining characteristic of which worm phylum? Advanced Guides

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Metamerism (biology) [1]

This article includes a list of general references, but it lacks sufficient corresponding inline citations. In biology, metamerism is the phenomenon of having a linear series of body segments fundamentally similar in structure, though not all such structures are entirely alike in any single life form because some of them perform special functions.[1] In animals, metameric segments are referred to as somites or metameres
In animals, zoologists define metamery as a mesodermal event resulting in serial repetition of unit subdivisions of ectoderm and mesoderm products.[1] Endoderm is not involved in metamery. Segmentation is not the same concept as metamerism: segmentation can be confined only to ectodermally derived tissue, e.g., in the Cestoda tapeworms
One can divide metamerism into two main categories:. – homonomous metamery is a strict serial succession of metameres

SOLVED: Serial repetition of segments is a defining characteristic of which worm phylum? [2]

Get 5 free video unlocks on our app with code GOMOBILE. Serial repetition of segments is a defining characteristic of which worm phylum?
What types of features are emphasized in a cladistic classification system? What is the resulting relationship of organisms that are classified in this manner?. Serial segmentation is a key characteristic of which of the following phyla?a
That means is continuous, so you’re going to see segment after segment in this type of worms, and what they’re talking about is the pilum known as the analytsso, the pilum analytic, which is the segmented worm phylum? What kind of stuff would you find there are things like earthworms, they’re, the most famous example of a segmented worm or an analyd, and then also things like leeches, and so, when you look at these kinds of…. An exclusive promotional rate that’s yours to keep forever

Which worm phylum lacks body segmentation? A) Both flatworms and roundworms B) Flatworms C) Annelids D) Roundworms [3]

Which worm phylum lacks body segmentation? A) Both flatworms and roundworms B) Flatworms C)…. The phylum is the taxonomic rank between kingdom and class
Become a Study.com member to unlock this answer! Create your accountView this answer. Our experts can answer your tough homework and study questions.Ask a question Ask a question
Understand some reasons why organisms are put into different phyla.. – Which type of worm lacks a complete digestive tract? a

worm [4]

Adult animals that have soft, elongated, often tubelike bodies and that lack backbones are commonly called worms. Worms are so different from one another that zoologists do not classify them together in a single group; they place them in about a dozen different and often unrelated taxonomic groups called phyla
However, the name is properly applied only to certain adult invertebrates.. Worms play a major role in virtually all ecosystems
Many free-living, or nonparasitic, worms form an important link in food chains.. All worms are bilaterally symmetrical, meaning that the two sides of their bodies are identical

Characteristics of living things [5]

When you look at the world around you, how do you categorise or group what you see? One of the broadest groupings is ‘living’ and ‘non-living’. This may sound simple, but it is sometimes difficult to decide whether something is truly alive or not
All living things share life processes such as growth and reproduction. Most scientists use seven life processes or characteristics to determine whether something is living or non-living.
This may be obvious, such as animals that are able to walk, or less obvious, such as plants that have parts that move to track the movement of the sun.|| |. Earthworms use circular and longitudinal muscles to move through soil or along surfaces.

Which one of the following is a defining characteristic of animals but not of plants? a. Prokaryotic. b. Heterotrophic. c. Autotrophic. d. Eukaryotic. [6]

Which one of the following is a defining characteristic of animals but not of plants? a….. Which one of the following is a defining characteristic of animals but not of plants?
Both of these contain a true nucleus, and other membrane-bound organelles. However, plant cells will contain other structures that animal cells will not, such as a cell wall, and a chloroplast for photosynthesis.
Prokaryotic cells do not make up neither animals, nor plants.. Our experts can answer your tough homework and study questions.Ask a question Ask a question

Phylum Annelida: Characteristics, Classification & Examples [7]

After a rainfall, you must have observed some small crawling creatures in your garden, commonly known as earthworms. Ever wondered where they come from all of a sudden? Earthworms require constant moisture
When it rains, the surface is sufficiently damp for worms to survive and stay hydrated. They can roam around, locate mates more easily or can move to another territory
But why? Earthworms make the soil fertile and never let down farmers when it comes to helping in growing crops. Hence, farmers consider earthworms as their best buddies

Phylum Annelida – Definition, Characteristics, Classification, Examples [8]

– Phylum Annelida is a diverse group of organisms within the animal kingdom. They are commonly known as segmented worms or annelids, and they exhibit a wide range of adaptations and lifestyles
– Annelids are characterized by their segmented bodies, which sets them apart from other organisms. The term “annelid” comes from the Latin word “anellus,” meaning “little ring,” referring to the segmented structure of their bodies
They are triploblastic, which means they have three primary germ layers during embryonic development, and they possess a coelom, a fluid-filled body cavity lined with mesoderm.. – One notable feature of annelids is the presence of parapodia, which are appendages used for locomotion in many species

Metamerism [9]

Metamerism is the repetition of homologous body segments. This type of development can be seen in the Annelids, which include earthworms, leeches, tubeworms, and their relatives
What is metamerism? Metarism is a biological occurrence in which growth occurs by the formation of linear and fundamentally similar structures. However, all the structures (also known as segments) are not exactly similar
In plants and animals, metameric segments are called metamers. More precisely, an animal that has a segmented body, each segment is called somites and in plants, they are also known as phytomers.

Classification of Animal Kingdom (Animalia) [10]

August 21st CA (Pulses, 3D Printing) | Daily CA Updates on Telegram. Classification of Animal Kingdom – Porifera, Coelenterata, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata, Chordata.]
Classification of Animal Kingdom is based on various fundamental features like –. – The broad classification of Animalia based on common fundamental features:
– For example, in sponges, the cells are arranged as loose cell aggregates, i.e., they exhibit cellular level of organisation. Some division of labour (activities) occur among the cells.

Overview, Types & Significance – Video & Lesson Transcript [11]

– Evolutionary Significance of Metamerism in Annelids. Organisms have evolved many adaptations to their environments
When learning about metamerism biology, keep in mind that there are two types of metamerism:. Animals evolved to have the body structures they now have because those structures were advantageous to the organisms
Annelids (i.e., Annelida or segmented worm) are invertebrate animals with a coelom (body cavity) and ringed body segments called metameres or annulations. In fact, the literal meaning of the word annelid is little rings.

Arthropod segmentation [12]

There is now compelling evidence that many arthropods pattern their segments using a clock-and-wavefront mechanism, analogous to that operating during vertebrate somitogenesis. In this Review, we discuss how the arthropod segmentation clock generates a repeating sequence of pair-rule gene expression, and how this is converted into a segment-polarity pattern by ‘timing factor’ wavefronts associated with axial extension
Finally, we describe how the repeated evolution of a simultaneous (Drosophila-like) mode of segmentation within holometabolan insects can be explained by heterochronic shifts in timing factor expression plus extensive pre-patterning of the pair-rule genes.. Arthropods are an ecdysozoan phylum defined by their segmented bodies and jointed limbs
The closest relatives of arthropods are onychophorans (velvet worms) and tardigrades (water bears); together these phyla form the segmented superphylum Panarthropoda (Fig. The great diversity of arthropod species is testament to the evolutionary potential of a segmented body plan: a modular organisation of fundamentally similar units arrayed serially along the anteroposterior (AP) axis (Hannibal and Patel, 2013)

Invertibrate E Book [13]

To browse Academia.edu and the wider internet faster and more securely, please take a few seconds to upgrade your browser.. This book is an introductory guide to invertebrate evolution for university students and others
The book is needed because in our overcrowded biology courses sadly little is taught about invertebrates; again and again in recent years students have asked me ‘Is there a little book?’ because the current comprehensive invertebrate textbooks are too big and heavy for their requirements. This second edition is needed because in the last six years there has been a surge of information from molecular methods of tracing phylogeny
The result is that there is an increased interest in invertebrates. Yet the relationships between animals can mean nothing without some basic knowledge of the animals themselves: an…

CBSE Class 11 Biology Chapter 4 Animal Kingdom Important Questions 2023-24 [14]

Download CBSE Class 11 Biology Chapter 4 Important Questions Free PDF. This article talks about the CBSE Class 11 Biology Chapter 4- Animal Kingdom important questions free PDF
These questions are created by Biology experts after detailed research on exam patterns and previous years’ question papers.. Solving these important questions will help students to prepare for Class 11 Biology Chapter 4 effectively for their exams
These questions cover the important topic of the chapters. Students can refer to CBSE Class 11 Biology Chapter 4 Important Questions for revision as well


The phylum accounts for about 85% of all animal species described so far represented in almost. all types of environment: freshwater, marine, and terrestrial
symmetric, triploblastic, coelomates with protostome – like development. by the presence of epidermis producing a segmented, jointed, and hardened chitinous
tagmatization – fusion and modification of different regions of the body for highly specialized. The exoskeleton (which is periodically molted) is secreted by epidermal cells with the

The invertebrate fossil record [16]

Molecular sequence data has resulted in a largely agreed, well-resolved phylogeny of the invertebrates. The fossil Lagerstätten of the Cambrian contain several possible stem members of invertebrate phyla, although there is frequent dispute about their interpretation
Nectocaris is a possible though considerably disputed cephalopod. Opabina, anomalocarids, Nereocaris, fuxianhuids, and megacheirans constitute a possible sequence of stem arthropods, indicating the sequence of acquisition of certain arthropodan characters
The yunnazoans are variously interpreted as stem chordates, cephalochordates, hemichordates, vertebrates, or even just in determinate bilaterians. Pikaea and conodonts are probably at least stem chordates and possibly vertebrates, while the earliest more or less undoubted stem vertebrate is Myllokunmingia.

serial repetition of segments is a defining characteristic of which worm phylum?
16 serial repetition of segments is a defining characteristic of which worm phylum? Advanced Guides


  1. https://en.wikipedia.org/wiki/Metamerism_(biology)#:~:text=Another%20worm%2C%20the%20earthworm%20in,muscle%20tissue%20can%20be%20found.
  2. https://www.numerade.com/ask/question/serial-repetition-of-segments-is-a-defining-characteristic-of-which-worm-phylum-47814/
  3. https://homework.study.com/explanation/which-worm-phylum-lacks-body-segmentation-a-both-flatworms-and-roundworms-b-flatworms-c-annelids-d-roundworms.html#:~:text=The%20correct%20answer%20is%20(A,structure%20of%20the%20phylum%20Annelida.
  4. https://kids.britannica.com/students/article/worm/277799#:~:text=in%20food%20chains.-,Characteristics,some%20have%20light%2Dsensing%20organs.
  5. https://www.sciencelearn.org.nz/resources/14-characteristics-of-living-things#:~:text=Key%20characteristics%20of%20animals%20include,stages%20of%20their%20life%20cycle.
  6. https://homework.study.com/explanation/which-one-of-the-following-is-a-defining-characteristic-of-animals-but-not-of-plants-a-prokaryotic-b-heterotrophic-c-autotrophic-d-eukaryotic.html#:~:text=Prokaryotic%20cells%20do%20not%20make,food%20to%20obtain%20their%20nutrients.
  7. https://www.aakash.ac.in/important-concepts/biology/phylum-annelida
  8. https://microbiologynote.com/phylum-annelida-definition-characteristics-classification-examples/
  9. https://www.biologyonline.com/dictionary/metamerism
  10. https://www.pmfias.com/classification-animalia-animal-kingdom/
  11. https://study.com/learn/lesson/annelida-segmentation-significance-of-metamerism-in-annalids.html
  12. https://journals.biologists.com/dev/article/146/18/dev170480/224188/Arthropod-segmentation
  13. https://www.academia.edu/45465276/Invertibrate_E_Book
  14. https://www.vedantu.com/cbse/important-questions-class-11-biology-chapter-4
  15. https://www.slideshare.net/SofiaNicoleGamboa1/zoo-lab-reviewerdocx
  16. https://academic.oup.com/book/26636/chapter/195345468
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