Chat with AIExam 12: Sponges and Placozoans
Explain the concept of monophyly as it applies to the animals.How do the relationships of placozoans and poriferans,as explained in this chapter,contribute to our understanding of the base of the animal tree shown on the inside cover of the book?
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Answered by Examlex AI CopilotMonophyly refers to a group of organisms that includes a common ancestor and all of its descendants. In the context of animals, monophyly refers to a group that includes all animals that share a common ancestor and excludes any other organisms. This concept is important in understanding the evolutionary relationships and classification of animals.
The relationships of placozoans and poriferans contribute to our understanding of the base of the animal tree shown on the inside cover of the book because they help to determine the earliest branching events in animal evolution. Placozoans and poriferans are considered to be some of the simplest and most primitive animals, and their placement in the animal tree can provide insights into the early diversification of animal life.
By studying the relationships of placozoans and poriferans, scientists can gain a better understanding of the common ancestor of all animals and the evolutionary processes that led to the diversity of animal life we see today. This information can help to refine and improve the accuracy of the animal tree and our understanding of the evolutionary history of animals. Overall, the relationships of placozoans and poriferans contribute to our understanding of the base of the animal tree by providing important insights into the early stages of animal evolution.
Specialized archaeocytes that secrete spicules are
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VerifiedB
The extracellular matrix found in sponges is
(95) VerifiedD
The most complex and the most common body form of sponges is found in the
(91) The order in which a drop of ink would pass by the structures in an ascon sponge is
(78) The flagellated cells embedded in the mesohyl of a sponge are called ___________________.Choanocytes line the spongocoel and flagellated chambers of sponges.They propel water through a sponge and filter food from the water.
(87) Internal buds of freshwater sponges that can withstand adverse conditions are ____________________.Gemmules are found in freshwater and a few marine sponges.They are internal buds that withstand harsh environmental conditions.
(77) If a sponge is fragmented and cells are dissociated from one another,the cells will
(70) In glass sponges,archaeocytes fuse their pseudopodia to form a
(81) Which of the following is NOT found in at least some sponges?
(75) Concerning producing larger organisms without cellular differentiation,
(85) The outer thin,flat,epithelial-like cells that cover the outside and some inside surfaces of sponges,are
(96) Specialized archaeocytes that secrete large quantities of collagen are
(70) Molecular data support the hypotheses that metazoans have a single origin or are _________________.
(90) The largest impact that the loss of sponges would have on the environment would be
(78) Which of the following statements about sponges is NOT correct?
(85) About 80% of particulate organic carbon in the marine environment is in the form of the smallest particles that sponges can consume,and phagocytosis of these particles is carried out by the ____________.Choanocytes create water currents and filter particulate food matter from the water.
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