Molecular fossils further indicate the presence of ciliates and dinoflagellates in the emerging eukaryotic world and show that algae were expanding to become major photosynthesizers in the oceans. How can we explain this diversification?

Q: In the three-domain model, the bacterial ancestor of chloroplasts derives from ancient A) O fungi.…

A: The three-domain system is a biological classification introduced by Carl Woese in 1990 that divides…

Q: In what way was the evolution of eukaryotic cells linked to the increase in the oxygen concentration…

A: Evolution is a continuous process and we are still evolving. Evolution is nothing but adapting to…

Q: The answer to the question of how eukaryotic cells evolved has been suggested in the Endosymbiotic…

A: The endosymbiotic theory was proposed by Lynn Margulis. This theory explains the origin of…

Q: Describe two ways in which paramecium differs from the projected traits of the last eukaryotic…

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

Q: Which of the following changes in early prokaryotes could be predicted to result in the emergence of…

A: Introduction : 1) The first single-celled organism appeared on earth about 3.5 billion years ago.…

Q: Describe the evidence that supports the endosymbiotic theory of evolution of eukaryotes.

A: Evolution is define as the change in the characteristics of a species over several generations and…

Q: Explain how the discovery of cytoskeletal elements in prokaryotes contributed to the current…

A: All the living organisms are made up of cells. These are the functional and structural units of life…

Q: Although they are not photosynthetic, apicomplexan parasites such as Plasmodium have modified…

A: Answer: Introduction: The Apicomplexa also known as Apicomplexia belong to phylum of parasitic…

Q: Plastids that are surrounded by more than twomembranes are evidence of(A) evolution from…

A: Plastides are double-membrane organelles that are present in plant and algae cells. Plastids are…

Q: Identify two features of organelles that support theendosymbiotic theory of organelle evolution.

A: Introduction  Life starts on earth around 3.4 billion years ago, in the ocean. Primitive organism…

Q: Explain why evolutionary biologists are interested in choanoflagellates, green algae, and organisms…

A: Evolutionary biologists are very interested in choanoflagellates, green algae and organisms with…

Q: Some molecular evidence suggests that the sister group of animals is not the choanoflagellates, but…

A: The flagella of choanocytes move water by their collars, which catch food particles. The shreds are…

Q: To mirror a disturbance event, she vigorously stirs the water in each container for varying amounts…

A: Independent variable is one whose value is not dependent on any variable.  Dependent variable is one…

Q: State and explain the theory of endosymbiosis. Discuss and relate its role in eukaryotic evolution…

A: The evolution of the two organelles of the eukaryotic cell that is the chloroplast and mitochondria…

Q: Fossilized stromatolites(A) formed around deep-sea vents.(B) resemble structures formed by bacterial…

A: Stromatolites are the fossils formed about 3.5 billion years ago, they are the earliest fossils.…

Q: Which of the following is true concerning red and brown algae? red and brown algae both belong to…

A: Algae are aquatic plants both marine and freshwater.  Some of them are terrestrial as well and are…

Q: What is the independent variable? What is the dependent variable? List four control variables. 1. 2.…

A: * The dependent variable is DIANOFLAGELLATES. * The independent variables is LIGHT.

Q: Molecular clock data place the evolution of diatoms around the time period following the Permian…

A: These are single celled algae . These live in houses made of glass.  They are the only organism with…

Q: DNA sequence data for a diplomonad, a euglenid, a plant, and an unidentified protist suggest that…

A: The diplomonads are the group of flagella containing organisms and are mostly parasitic in nature.…

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: Recent evidence suggests that symbionts may be pivotal in evolutionary events. How might bacteria be…

A: Symbionts are organisms that follow symbiosis. They form close and long term biological interactions…

Q: Describe the features of mitochondria and chloroplasts that support the endosymbiotic theory.

A: According to the endosymbiotic theory, the organelles like mitochondria and chloroplast in today's…

Q: You are on a hike and collect an interesting organism. You carefully examine and research the…

A: Introduction: Robert H. Whittaker, in 1969 proposed a new five kingdom system of classification of…

Q: How are forams useful for researchers to study changes in ocean temperature over time

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,…

Q: Which of the following statement(s) is/are TRUE? a. yeasts are unicellular fungi b. molds and…

A: Mainly there is recognition of five-kingdom classification given by R.H Whittaker and it was based…

Q: Molecular evidence supports the view that all plastids evolved from an ancient (a) cyanobacterium…

A: Plastids are the organelles present in plants and are classified according to the presence or…

Q: Fossil evidence indicates that prokaryotes have been around for about 3.5 billion years, whereas the…

A: There are 2 hypotheses regarding origin of organelle. These 2 hypotheses are autogenous and…

Q: are members of the plankton community that can enter a metabolically dormant state within a…

A: Answer :  d.  Bacillariophyta.

Q: Does the following phylogenetic tree provide evidence to support or refute the endosymbiosis…

A: Endosymbiosis theory states that the eukaryotic organisms evolved from prokaryotes as many…

Q: In which aspect do all protozoans definitely differ from animals?    a) Unicellularity b)…

A: Protozoans: Protozoa (singular protozoon or protozoan, plural protozoa or protozoans) are…

Q: Identify the major cell wall components of the following if there are any Plants  Animals  Protozoa…

A: A cell is a structural and functional unit of life. The structure and function of a cell have been…

Q: Compare the phylogenetic  tree of protists with the secondary endosymbiosis theory which proposes…

A: Protists are single celled organisms, but they don’t have much else in common. They are…

Q: According to the endosymbiotic theory, protoeukaryotes did not have ribosomes until the…

A: The Endosymbiotic Theory expresses that the mitochondria and chloroplast in eukaryotic cells were…

Q: Amanda learns that some species of algae share the characteristics of being single-felled and…

A: Algae are a diverse group of aquatic organisms that have the ability to conduct photosynthesis. Some…

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: Based on Endosymbiotic Theory, the Mitochondria and Chloroplast were once prokaryotic organisms that…

A: Endosymbiotic theory is the leading evolutionary theory of the origin of eukaryotic cells from…

Q: Chloroplasts of green algae evolved from_____ . a. cyanobacteria b. archaea c. red algae

A: Chloroplasts are the cellular organelles in plants and green algae. It is the site of photosynthesis…

Q: How did the evolution of oxygen-releasing photosynthesis in cyanobacteria increase the likelihood…

A: The great number of similarities of mitochondria with the prokaryotic characters upon comparison…

Q: The membrane structure that eventually evolved into the double nuclear membrane of the eukaryotes…

A: Introduction The nuclear envelope, also known as the nuclear membrane, is a pair of lipid bilayer…

Q: Single-celled Eukaryotes were preceded by what environmental development on Earth? O a. The forming…

A: Eukaryotes are the organisms having well defined nucleus with cellular organelles such as…

Q: What are relictual (plesiomorphic) features? Derived (apomorphic) features? Which organisms seem to…

A: Prokaryotes are single-celled organisms with very simplistic internal structures lacking a true…

Q: Your interest in the evolution of early animals from non-animal ancestors means that you have done a…

A: Scientists have found that the choanoflagellates are the closest single celled living relatives to…

Q: DRAW IT Recent evidence indicates that the root ofthe eukaryotic tree may lie between a clade that…

A: Unikonta is a recently proposed, diverse super-group of the eukaryotes. It includes fungi, animals,…

Q: Make alist of features and processes that you think might have been passed down from leca to modern…

A: Hello, thank you for the question. I am assuming the term LUCA is mistyped as LECA, As Lightweight…

Q: Would the following ancestral cell have been a prokaryote or an early eukaryote? Briefly explain…

A: Biological evolution refers to the origin of first biological cell from non living chemical…

Q: Describe features you would look for under the microscope to determine if a cell is prokaryotic or…

A: Cells are the basic unit of life as no living organism can have life without being cellular because…

Archaeal cell structure

Bacteria and archaea are two different prokaryotic domains that, along with eukarya, make up the three domains of life. Archaeal organisms can be found all over the biosphere. Many genera are extremophiles, meaning they thrive in extreme environments such as extremely high temperatures, high salinity, or pH extremes. Bacterial and archaeal cells are characterized by the absence of a nucleus and membrane-bound organelles.