1. The endosymbiotic theory proposes that eukaryotic cells, which are more complex than prokaryotic cells, originated through a mutually beneficial relationship between different types of simpler prokaryotic cells.
2. Characteristics of mitochondria that support the endosymbiotic theory include their similar size and shape to free-living prokaryotic cells, the presence of their own DNA (circular, like prokaryotic DNA), and the fact that mitochondria divide independently of the host cell.
3. An example of endosymbiosis that has been observed and documented is the relationship between certain corals and photosynthetic dinoflagellates called zooxanthellae. These dinoflagellates live inside the coral cells.
1. According to this theory, an ancestral eukaryotic cell engulfed smaller prokaryotic cells (likely a bacterium) and instead of digesting them, formed a symbiotic relationship. Over time, these engulfed cells became specialized organelles within the host cell, such as mitochondria and chloroplasts, responsible for energy production and photosynthesis. This theory suggests that eukaryotic cells with their membrane-bound organelles, like the nucleus, evolved from this cooperative relationship between host and endosymbiont.
2. These characteristics suggest that mitochondria were once free-living aerobic bacteria that were engulfed by an ancestral host cell. Over time, they evolved into specialized organelles for energy production within the eukaryotic host cell, much like their bacterial ancestors.
3.The coral provides protection and a stable environment for the zooxanthellae, while the zooxanthellae carry out photosynthesis, providing the coral with nutrients. This mutualistic relationship enhances the coral's ability to survive in nutrient-poor waters and helps create the vibrant colors seen in coral reefs. This real-life example illustrates how endosymbiosis can lead to a mutually beneficial partnership between two different organisms, similar to the concept proposed in the endosymbiotic theory of eukaryotic cell origin.
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"if you drink alcohol socially, what helps insure safe driving"
To ensure safe driving while drinking alcohol socially, it's important to not drive if you've had too much to drink. Instead, arrange a designated driver, use public transportation, or a taxi. Being aware of your own limits and drinking responsibly is fundamental.
Explanation:When drinking alcohol socially, it's important to ensure you're practicing safe driving. One way to ensure this is not to drive if you've had too much to drink. Instead, arranging a designated driver, who doesn't indulge in any alcoholic beverages, is a good measure. You may also make use of public transportation or hire a taxi or ride-share service. Drinking responsibly and being aware of your own limits is crucial. Remember, even one drink can impair your driving skills depending on various factors like body weight, food consumption, etc. Moreover, it's not just about your safety, but also about the safety of others on the road.
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which two organisms are most closely related, based on the tree above?
A. ray-finned fishes and sharks
B. rodents and primates
C. dinosaurs and crocodiles
D. dinosaurs and birds
Answer:
D. Dinosaurs and birds !!
Explanation:
Hope that helps ya!^^ <3
Final answer:
Dinosaurs and birds are the two organisms that are most closely related.
Explanation:
Based on the information provided, the two organisms that are most closely related are dinosaurs and birds. Birds are considered to be highly modified diapsids and they evolved from theropod dinosaurs. They share a common ancestor and have similar structural characteristics, such as the presence of feathers and a beak.
States that all living things are composed of cells, cells are the basic unit of life, and cells come from pre-existing cells
it is about the unified cell theory.
The statement you provided describes the fundamental principles of cell theory:
All living things are composed of cells: Cell theory asserts that all living organisms, whether they are single-celled or multicellular, are made up of one or more cells. Cells are the structural and functional building blocks of life.
Cells are the basic unit of life: Cell theory recognizes that cells are the smallest units of life and the fundamental functional and structural entities of living organisms. All life processes and functions occur within cells.
Cells come from pre-existing cells: This principle highlights that cells arise through the division of pre-existing cells. In other words, new cells are produced from the division of parent cells. This concept contrasts with the earlier idea of spontaneous generation, which posited that life could arise spontaneously from non-living matter.
Cell theory is a foundational concept in biology, and it was developed through the work of scientists like Matthias Schleiden, Theodor Schwann, and Rudolf Virchow in the 19th century. It provides a unifying framework for understanding the structure, function, and origin of all living organisms.
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The probable question maybe:
"What scientific theory states that all living things are composed of cells, cells are the basic unit of life, and cells come from pre-existing cells?"
Plasmodial slime molds move by A. whipping their flagella. B. streaming along as a mass of cytoplasm. C. infecting a host organism. D. beating their cilia.
Answer: streaming along as a mass of cytoplasm.
Explanation:
Plasmodial slime molds are single cells that are fuse together by 1000 nuclei that are formed by the fusion of several flagellate cells. They form fruiting bodies when there is stimulus. The fruiting bodies help to disperse individual cells when there is favorable condition. They move by ooze to obtain good.
Severe acid rain caused by factory emissions can erode the leaves of plants. Which statement best explains why this would harm the plant life? A. Water needed for growth would not be able to be taken up from the soil. B. Insects needed for pollination would not be attracted to the plants. C. Sunlight needed for energy would not be able to be absorbed. D. Nitrogen compounds needed for growth would not be available.
Answer:.
Sunlight needed for energy would not be able to be absorbed.
Explanation:
Answer:
c
Explanation:
Why would a signaling pathway need to be regulated?
Suggest reasons why the information represented in the pyramid of numbers of animals of one of the ecosystems you studied may not truly represent that ecosystem.
. Which order of amphibian is characterized as having no legs?
what evolutionary feature would distinguish phytoplankton from zooplankton?
The evolutionary feature that would distinguish phytoplankton from zooplankton is: nutrition and cellular structure.
Evolutionary Feature:
Phytoplankton and zooplankton are two distinct groups of plankton that play crucial roles in aquatic ecosystems, and they can be differentiated primarily by their evolutionary features related to nutrition and cellular structure.
Key Evolutionary Features
1) Nutritional Mode
Phytoplankton are autotrophic organisms, meaning they can produce their own food through photosynthesis or chemosynthesis. This ability allows them to convert sunlight or chemical energy into organic matter, making them primary producers in the aquatic food web. They are typically plant-like and include groups such as diatoms, dinoflagellates, and cyanobacteria.
Zooplankton, on the other hand, are heterotrophic, which means they cannot produce their own food and must consume other organisms, primarily phytoplankton. They are considered consumers in the food chain and include a variety of organisms such as crustaceans (like copepods and krill), protozoans, and larval stages of larger animals.
2) Cellular Structure
Phytoplankton possess chlorophyll and other pigments that enable them to capture light energy for photosynthesis. Their cellular structure is similar to that of plants, containing chloroplasts and a rigid cell wall, which can be composed of silica (as in diatoms) or cellulose (as in green algae).
In contrast, zooplankton lack chlorophyll and do not have the cellular structures necessary for photosynthesis. Their cells are typically more complex in terms of mobility and sensory structures, allowing them to navigate through water and respond to environmental stimuli.
which conclusion is best supported by Daniels observations and discoveries
Which conclusion is best supported by Daniel’s observations and discoveries? d
Match the scientist with the correct statement. 1. astronomer "Sea otters are on the endangered species list due to over-hunting for their beautiful fur." 2. geologist "A dinosaur mummy was found with much of its tissues and bones still encased!" 3. oceanographer "Many schools in Vermont are closed due to heavy snow, sleet, and rain." 4. meteorologist "Black holes are a small sphere of densely packed matter."
Answer:
Many schools in Vermont are closed due to heavy snow, sleet, and rain- meteorologist.
Black holes are a small sphere of densely packed matter - astronomer.
Explanation:
Which term refers to the hypothetical brain changes associated with the formation of a long-term memory?
What can be concluded about Clades 2 and 4 from this cladogram?
A- clade 2 was derived from clade 4
B- clade 4 is ancestral to class 2
C- clade 4 was derived from clade 2
D- clade 2 is a subset of clade 4
In genetic engineering, the staggered cuts in dna that allow genes to be spliced together are made by __________.
The answer is restriction enzymes. These staggered ends are important in recombination of DNA since they allow DNA strands with complementary sticky ends to be easily joined into one piece by DNA ligase. Other restriction enzymes produce blunt ends. These are harder to join by DNA ligase. An example of a restriction ezyme if EcoRI
what causes Earth's crust to crumble and fold
The Earth's crust crumbles and folds due to movements and interactions of tectonic plates that exert forces called stress, causing the physical deformation known as strain.
The Earth's crust crumbles and folds mainly due to the movement and interactions of tectonic plates. This process involves significant forces that cause the crust to bend, deform, and sometimes break, leading to the formation of folds and faults. These forces are known as stress, and the resultant physical changes in the crust are referred to as strain.
There are three basic kinds of stress:
Compression: Occurs when rock masses are pushed together, often creating folds in the rock. This typically happens when tectonic plates collide.Tension: Pulls the crust apart, leading to thinning and lengthening of the crust, such as the formation of rift valleys.Shearing: Takes place when plates slide past each other, cutting the crust into parallel blocks and displacing them horizontally.Deep within the Earth, as plates collide, rocks crumple into folds much like when you push on opposite edges of a piece of cloth. These processes not only shape Earth's surface but also result in geological activities like earthquakes and volcanic eruptions.
Statistically, who is at greatest risk for committing suicide?
a. sue, a 30-year-old japanese american female
b. star, a 35-year-old native american female
c. stuart, a 65-year-old white male
d. bobby, a 14-year-old african american male
d. bobby a 14 year old boy
What is the role of glu 270 and arg 145 in catalysis?
The American Psychological Association is the only organization that can approve psychological research studies. Please select the best answer from the choices provided T F
What is the importance of the carbon and nitrogen cycles to ecosystems?
They are needed to release the energy stored in food.
They provide materials organisms need to build their bodies.
They ensure that matter only moves within a nonliving environment.
They supply the energy needed for living processes.
The geographical region where flora, fauna and other microorganism resides with each other depending on some factors along with abiotic factors and bio geological cycles is called an ecosystem.
Carbon and nitrogen cycles provide the material organisms need to build their bodies.
What is carbon and nitrogen cycles?The carbon cycle is a biogeochemical cycle that ensures the circulation of the organic and inorganic carbon compounds in the atmosphere and the biosphere.The nitrogen cycle is also the cycle that ensures the flow of nitrogen and its compounds in the layers of the Earth needed for the various processes.The cycle ensures the movement of the compounds and the elements within both the biotic and abiotic factors of the ecosystem.
Therefore, option B is correct.
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Juliet is using a paper towel to clean up a juice spill. The liquid sticks to the paper towel because of _____.
The animals living in the deeper parts of the sea floor, ____
Which compound is inorganic?
A. C6H12O6
B. KH2PO4
C. CH3COOH
D. C2H6
E. C2H5OH
The compound is inorganic B. KH₂PO₄ as it has no carbon but all the organic compounds have the carbon.
What are the four inorganic compounds?The following phase examines the 4 businesses of inorganic compounds crucial to life: water, salts, acids, and bases.
Compound wherein carbon-hydrogen bonds is absent is known as an inorganic compound.
An inorganic compound or greater factors are joined in exact proportions.
They are dissolved in water mythical H₂F is the molecular system of Potassium dihydrogen phosphate.
It is a product of potassium salt and dihydrogen phosphate ions which is likewise called monobasic potassium phosphate.
Potassium dihydrogen phosphate is used as a buffering agent and utilized in fertilizers.
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Plant cells produce oxygen gas ____. by splitting carbon dioxide. by splitting ribulose bisphosphate. by breaking down glucose by splitting molecules of water.
Plant cells produce oxygen gas by splitting molecules of water.
• A kind of chemical reaction in which molecules are dissociated into smaller components by the activity of light is termed photolysis.
• For example, in the process of photosynthesis, the photolysis of water molecule takes place under the activity of light.
• During the process of photolysis, the absorption of photons takes place, which makes hydrogen to combine with an acceptor, and subsequently discharging the molecule of oxygen.
• The molecule of water acts as a substrate for photolysis in the process of photosynthesis, resulting in the formation of diatomic molecule of oxygen.
Thus, plant cells produce oxygen gas by splitting the molecules of water.
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What is the primary function of most bacteria in a food web? A) producer B) predator C) decomposer D) primary consumers
Answer: is c
Explanation:
decomposer is teh answer
Fifty years ago, bed bugs were nearly eliminated in the United States by using of pesticides like DDT. Today bed bugs are back in beds and theaters. DDT is no longer used due to environmental issues. Pyrethrums are currently the top choice for bed bug infestations. Pyrethrums are especially useful to us because they generally have a stronger effect on bugs than on humans and animals. However, bed bugs have become resistant to even this chemical pesticide. What happened that allowed the bug population to increase? A) the chemicals used currently are weaker B) the chemicals no longer can penetrate bed bugs brains C) the bed bugs of today are exactly the same as the bed bugs of fifty years ago D) the bed bugs that survived the DDT years ago, reproduced new generations of chemical resistant offspring
Answer:
D) os percevejos que sobreviveram ao DDT anos atrás, reproduziu novas gerações de filhotes resistentes a produtos químicos
Explanation:
It is very common for chemical insecticides to cause insect-resistant insects such as bed bugs shown in the above question. This was because when DDT was used to exterminate the bed bug population, some of these insects had chemical resistance to this product, which means that the product had no effect on their organisms.
These bed bugs survived and reproduced, creating new bed bugs that inherited their genetic property capable of producing DDT resistance. These bed bugs also reproduced thus generating a population of resistant bed bugs. The result is that the product has become inefficient in this new generation of bed bugs.
does baby mammals depends on milk to survive
A primiparous woman tells the nurse that she and her partner are highly reluctant to have their infant vaccinated, stating, "we've read that vaccines can potentially cause a lot of harm, so we're not sure we want to take that risk." how should the nurse respond to this family's concerns?
The nurse should respond that "Vaccinations are not without some risks, but these are far exceeded by the potential benefits." The nurse should explain the benefits that vaccine can be in the health of the child hence there are news about it there isn’t direct evidence saying that it’s not good for babies at all.
Name two vestigial structures.
Select all that apply. What are the main types of resumes you can create?
Answer:
Chronological, Functional, Combination, Infographic, Targeted, Nontraditional, Mini-Resume.
Explanation:
The resume has become an essential document when requesting, for example, work or a scholarship. The resume serves to describe a person's trajectory (their studies and knowledge, and all the data that help to understand their professional experience). One must be careful when drawing up a resume, because this document is the applicant's presentation card and, definitely, it is the first image that one acquires from those who present it to the company or institution to which it is addressed.
The main types of resumes you can write are: Chronological, Functional, Combination, Infographic, Targeted, Nontraditional, Mini-Resume.
True or false: polysaccharides, lipids, and other non-protein antigens are called t-independent antigens because they induce antibody responses without t cell help.
a. True
b. False