how did metazoans evolve from a choanocyte like ancestor

Q: What are characteristics of Sporozoa?

A: Protozoans are microscopic unicellular eukaryotic organisms with heterotrophic mode of nutrition.…

Q: Why are mesozoans considered the intermediate step between protozoans and metazoans?

A: Animal Kingdom classification is very significant to understand how the organisms are related to one…

Q: Which group of protozoans are nonmotile?

A: In the living world, we see a large number of microorganisms, animals and plants. These organisms…

Q: In what ciliates is different from all other protozoans?

A: Protozoans are single-celled eukaryotic organisms. They may exist in a free-living form or many…

Q: Can a protozoan without food survive? Explain.

A: Protozoa is a group that includes unicellular eukaryotes. These can be free living or parasitic.…

Q: How do protozoan protists do locomotion?

A: Protozoa are unicellular eukaryotic organisms that show characteristics associated with animals.…

Q: Does coelom present in bilateria?

A: A celom is the hallow cavity which is filled with celomic fluid present between the intestinal canal…

Q: How do gonozoids obtain their food in this colonial organism?

A: In colonial hydroids, the individual zooids or polyps have different functions like gonozooids are…

Q: Do protozoans have a cellular nucleus?

A: Protozoa are heterotrophic, eukaryotic, unicellular, organisms. They have almost 65000 species of…

Q: Why might a parasitic protozoan lack mitochondria?

A: Answer- Parasites are those organisms that totally depends upon the host organism for food and…

Q: If you were asked to choose one of the following invertebrate as a pet (protozoa, sponges, and…

A: Protozoans *protozoans are single celled eukaryotes that lives free living or parasitic means that…

Q: What do you mean by protozoan Tetrahymena?

A: Protozoan are microscopic, single celled organisms belong to kingdom Protista

Q: Which characteristic(s) is/are not typical of protozoan cells?a. locomotor organelle c. sporeb. cyst…

A: The group of simply organized organisms whose size ranges from  1 micrometer to several millimeters…

Q: How many kinds of mesozoans exist and where would you search for them?

A: The soft-bodied animals having no firm internal skeleton for the attachment of muscles are called as…

Q: Why do we still refer to a giant clam as a metazoan?

A: Protozoans are the unicellular primitive organisms and are eukaryotes. Some of them are free-living…

Q: What are sporozoans ? What role do they play ?

A: A protist is any eukaryotic organic entity that is anything but a creature, plant, or parasite.…

Q: Are ctenophores basal metazoans?

A: Ctenophores belong to the phylum Ctenophora, kingdom Animalia. Ctenophores are known as sea…

Q: What are Flagellated protozoans?

A: Eukaryotes are any form of living organisms that contain complex cells including mitochondria,…

Q: Which of the following Eukaryotic groups includes organisms capable of aerobic cellular respiration…

A: Eukaryotes are living organisms whose cells contain a core and other film bound organelles. There is…

Q: What has been the role of water molds in the environment andhistory?

A: There are quite five hundred species within the Oomycota -- these include the so-called water molds…

Q: What is the role of a cyst in protozoan reproduction?

A: Cyst have a thick cell wall that helps in the survival,in harsh environments.

Q: How have protozoan adapted to deal with the absence of cell wall?

A: protozoans are microbes which are eukaryotic and mostly found in moist environmnet .  the cell wall…

Q: This organism belongs to which Phylum?

A: The above organism looks to have a transparent gelatin like body with presence of Illuminious body.…

Q: Where are nematocysts located in the Anthozoans (subphylum Anthozoa)?

A: Anthozoa is a subphylum under phylum Cnidaria.It is a class of marine invertebrates which includes…

Q: Describe the protozoan characteristics that illustrate why protozoa are informally placed into a…

A: The taxonomy is the method by which numerous living organisms are placed in a group or species. The…

Q: What are Zooflagellated Protozoans and what are its parasitic forms

A: Protozoa, also known as protozoan, are a group of unicellular eukaryotic organisms. They are either…

Q: What are Sporozoans?

A: Protozoa is a single-celled eukaryotes, either free-living or parasitic. It feed on organic matter…

Q: What are various categories of protozoan protists?

A: Animals belonging to Kingdom Protista are generally found in water or moist terrestrial environment.…

Q: What structural feature of prokaryotic cells might you expect to have changed before and…

A: * Many structural features of prokaryotic cells have changed before endosymbionts acquired by…

Q: Which phylum is characterized by a hard, flexible exoskeleton and multiple life cycles?

A: Ans. Animals from the biological Animalia kingdom, are multicellular eukaryotic organisms. Animals…

Q: Which protozoan group has Pseudopodia?

A: Protozoa are unicellular eukaryotes which show resemblance to animals in terms of their nutritional…

Q: What are characteristics of protozoan protists?

A: Kingdom Protista is usually referred to as a mixed kingdom as it has a variety of organisms. Kingdom…

Q: What characteristics of protozoa make them resemble animals?

A: Protozoa are unicellular organisms that have some traits with animal cells, such as the ability to…

Q: Where are Sporozoans found?

A: Micro-organisms are such small living organisms that are less than 0.1 mm, and can be seen only…

Q: Identify: 13. The organism where some ancestral Cercozoans derived their plastids

A: In eukaryotic cells, the plastid forms the main sites of photosynthesis. They are double-membraned…

Q: How are protozoans classified and explain the process of sexual reproduction by means of…

A: Protozoans are eukaryotic organisms that are unicellular and heterotrophic. Protozoans are…

Q: Why are all animals comprised of the clade metazoa?

A: Kingdom Animalia comprises the clade metazoan. Traditionally, the term metazoan has been used to…

Q: How is the biology of onychophorans related to their distribution?

A: Comparative anatomy is the study of the "similarities and dissimilarities" between various objects.…

Q: The paraphyletic phylum Choanozoa contains chytrid zoospores and human sperm, among many other…

A: Choanozoa phylum, also called as Choanoflagellata is derived from Greek and Latin words meaning…

Q: What is the importance of Protozoans. Why do we need to study it?

A: Protozoa are organisms with a single cell. They come in a variety of shapes and sizes, ranging from…

Q: Which of the following protozoan uses flagella for locomotion? Group of answer choices…

A: *protozoans are  single celled eukaryotes thatare either free-living or parasitic feeds on organic…

Q: Explain bryozoans?

A: bryozoans They are marine animals belongs to kingdom animalia.  Scientific classification Kingdom -…

Q: What are Ciliated protozoans?

A: Protozoans are single-celled eukaryotes that are either free-living or parasites. Their often feed…

Q: In what way is a hydra atypical as a hydrozoan?

A: Hydra is an invertebrate belonging to the class Cnidaria. It is a freshwater organism that is an…

Q: How abundant are archaeons in the oceans?

A: Archaea is a separate domain of unicellular organisms. These organisms do not have nuclei in their…

Q: Do protozoans have sexual or asexual reproduction?

A: Protozoa are single-celled microscopic, animal-like organisms that are a part of the Kingdom…

Q: How does the body plan of Orthonectida and Rhombozoa relate to their parasitic behavior?

A: *Dicyemida and the Orthonectida, two enigmatic groups of morphologically simple parasitic…

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.