difference between viruses and cells?

The positions of the mouths in planarians, tapeworms, and flukes are different due to their unique feeding habits and body structures. Planarians have a mouth located ventrally near the middle of their body, tapeworms have no mouth as they absorb nutrients directly through their body surface.

Planarians, tapeworms, and flukes are all types of flatworms, but they have distinct feeding habits. Planarians are free-living organisms that use their mouth to ingest food particles. In tapeworms, which are parasitic organisms, there is no mouth because they absorb nutrients directly through their tegument, a specialized body surface. Flukes, also parasitic, have a mouth at the anterior end of their body, which they use to feed on blood, tissue, or other bodily fluids of their host.

The position of the mouth in planarians, tapeworms, and flukes is a reflection of their respective feeding habits and body structures. While planarians have a centrally-located mouth for ingesting food, tapeworms lack a mouth due to their nutrient-absorbing body surface, and flukes possess an anterior mouth used for feeding on host fluids.

To know more about feeding habits, click here

https://brainly.com/question/26263596

#SPJ11

When a eukaryotic gene's transcription requires the activity of an enhancer sequence, proteins bound at the enhancer interact with the transcription factors and the RNA polymerase complex.

The enhancer sequence itself is composed of specific DNA elements that serve as binding sites for these proteins. The proteins bound at the enhancer can either directly interact with the transcription factors or indirectly affect their activity through protein-protein interactions. This interaction results in the activation of the transcription factors and recruitment of the RNA polymerase complex to the gene's promoter region.

The enhancer-protein complex facilitates the looping of DNA, bringing the enhancer and promoter regions into close proximity. This proximity allows the transcription factors and RNA polymerase complex to interact and initiate transcription of the gene. In summary, proteins bound at the enhancer interact with transcription factors and the RNA polymerase complex to regulate the transcription of the eukaryotic gene.

More on eukaryotic genes: https://brainly.com/question/31184755

#SPJ11

Answer:

Muscle cells have a ton of mitochondria.

Explanation:

I do not know if this is what you need, as question is too vague. But muscle cells have a lot of mitochondria because they need energy to help us move daily.

Lymphatic collecting vessels transport lymphatic fluid, similar to veins, carrying white blood cells throughout the body. They are divided into lymphatic capillaries and larger collecting vessels. The lymphatic system is crucial for the immune system, removing waste products, excess fluid, and immune cells from tissues, returning them to the bloodstream, and preventing the spread of infectious agents.

Lymphatic collecting vessels are most closely associated with the transport of the lymphatic system. lymphatic collecting vessels are most closely associated with the transport of the lymphatic system. Lymphatic collecting vessels are responsible for the transportation of lymphatic fluid.

These vessels are similar to veins in terms of their structure and function, and they carry lymph, a clear fluid containing white blood cells, throughout the body. Lymphatic vessels are divided into lymphatic capillaries, which are the smallest vessels, and lymphatic collecting vessels, which are larger vessels that drain into the lymphatic trunks.

The lymphatic system is a critical component of the body's immune system. It aids in the removal of waste products, excess fluid, and immune cells from the tissues and returns them to the bloodstream, where they are transported to the liver and kidneys for processing and elimination.

This system is responsible for preventing the spread of infectious agents and other harmful substances throughout the body.

To know more about lymphatic fluid Visit:

https://brainly.com/question/33293332

#SPJ11

answer: The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf, and the products of photosynthesis, sugar and oxygen, leave the leaf.

Explanation:

hope this help

Answer:

false

Explanation:

because derm=skin and skin is not muscle skin is a type of tissue

hope this helped :)

Answer:

Question 2 is option 2. It is the only one that makes sense and it says sediment sin it.

Explanation:

The Patriot Act of 2001 criminalized acts of cyberterrorism. The USA PATRIOT Act, also known as the Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism Act, is a federal law enacted by the United States Congress in 2001 after the September 11 terrorist attacks on the United States.

The Patriot Act, which included provisions for surveillance, intelligence, and law enforcement powers, made it illegal to conduct acts of cyberterrorism. The term "cyberterrorism" refers to the use of computers and information technology to conduct terrorist acts. Acts of cyberterrorism might include cyberattacks on critical infrastructure, such as water and power systems, or the use of hacking to steal sensitive information. In 2001, the United States passed the USA PATRIOT Act in response to the terrorist attacks of September 11, which included provisions aimed at preventing acts of terrorism, including acts of cyberterrorism.

Section 814 of the Patriot Act, also known as the "Cyberterrorism Prevention Act of 2001," criminalized acts of cyberterrorism and made it illegal to engage in activities designed to damage or interfere with critical infrastructure or to commit other acts of terrorism using computers or the internet. The Patriot Act has been a controversial law, with critics arguing that it infringes on civil liberties and provides law enforcement agencies with too much power. Nonetheless, it remains a key piece of legislation in the fight against terrorism, including acts of cyberterrorism.

To know more about cyberterrorism visit:

https://brainly.com/question/22097207

#SPJ11

Answer:

Exchange of Gases, Nutrients, and Waste Between Blood and Tissue Occurs in the Capillaries. Capillaries are tiny vessels that branch out from arterioles to form networks around body cells.

Explanation:

The microscope that is typically used to plot an absorption spectrum of the item under examination is called a spectro photo microscope. This specialized microscope combines the principles of a conventional microscope with those of a spectrophotometer.

A spectro photo microscope allows scientists to examine microscopic samples while simultaneously measuring their absorption of light at different wavelengths. It works by illuminating the sample with a beam of light and analyzing the transmitted or reflected light that passes through the sample. The microscope collects the light and passes it through a prism or a diffraction grating, which separates the light into its different wavelengths. The intensity of the light at each wavelength is then measured, creating an absorption spectrum.

This powerful tool enables researchers to study the interaction of light with microscopic samples, such as cells, tissues, nanoparticles, or other materials. By analyzing the absorption spectrum, scientists can gain valuable insights into the chemical composition, molecular structure, and optical properties of the sample under investigation.

In summary, a spectro photo microscope is specifically designed to capture absorption spectra of microscopic samples, providing a comprehensive understanding of their light absorption characteristics.

spectrophotometer https://brainly.com/question/21578855

#SPJ11

Answer:

That's um...well how do I say this, terrible. They're saying it's a horrible thing but I think not, everyone does different things and I respect that. So it's best not to judge someone by what they're doing even in a magazine.

Answer:

Water's polarity allows it to dissolve other polar substances very easily. ... Wherever water goes, it carries dissolved chemicals, minerals, and nutrients that are used to support living things. Because of their polarity, water molecules are strongly attracted to one another, which gives water a high surface tension

Answer:

Water's polarity allows it to dissolve other polar substances very easily. ... Wherever water goes, it carries dissolved chemicals, minerals, and nutrients that are used to support living things. Because of their polarity, water molecules are strongly attracted to one another, which gives water a high surface tension.

polar molecules are attracted to each other by dipole-dipole attractions between the partial negative charge of one polar molecule and the partial positive charge on another polar molecule. ... Therefore, polar molecules like HCl are held together by both dipole-dipole attractions and London forces

plz mark brainliest

Answer:

D. Identical twins share the exact same DNA, but fraternal twins do not.

Explanation:

Identical twins are the twins formed from one egg provided by their mother and one sperm provided by their father. In contrast, fraternal twins are formed from two different sperms and two different eggs from the same father and mother.

Due to the fact that identical twins are as a result of one fertilized egg dividing into two, they share the same exact DNA. On the other hand, fraternal twins do not share the same exact DNA because they are formed from separate eggs and separate sperms.

Answer:

d

Explanation:

just took test

Answer:

Researchers broke down sustainable development into categories such as carbon dioxide emissions and use of natural resources like nitrogen, phosphorus and clean water. Bad news, Earthlings: It may be possible for everyone on the planet to live a “good” life.

Explanation:

Sustainability improves the quality of our lives, protects our ecosystem and preserves natural resources for future generations.

Sustainable living means understanding how our lifestyle choices impact the world around us and finding ways for everyone to live better and lighter. Applying a 'people lens' to sustainability is new, timely and opportunities are great.

Explanation:

your is your answer can u follow me

Explanation:

Predation plays an important role in the overall health of an ecosystem since it regulates the population of preys as well as maintain the population of higher-level consumers. If predators were eliminated from an ecosystem, it would cause an increase of the population of preys and potentially decrease the population of other organisms on lower trophic levels. An example of such effect can be seen from the population of rabbits and plants supposing that foxes, eagles and snakes are eliminated from the ecosystem. The rabbit population will multiply, causing a decrease in the population of plants such as grass that rabbits feed on.

Hope this helps :)

Answer: D. Keratin

Explanation: Keratinocytes (pronounced: ker-uh-TIH-no-sites) make keratin, a type of protein that's a basic component of hair, skin, and nails. Keratin in the skin's outer layer helps create a protective barrier.

The total length of DNA in the body is approximately 100 trillion meters, which is equivalent to 100 billion kilometers or about 6.6 billion times the distance from the Earth to the Sun.

Assuming that each cell contains about 2 meters of DNA and there are 50 trillion cells in the human body,

the total length of DNA in the body can be calculated by multiplying the length of DNA per cell by the number of cells in the body:

Total length of DNA = 2 meters/cell x 50 trillion cells

Total length of DNA = 100 trillion meters

Therefore, the total length of DNA in the body is approximately 100 trillion meters,

which is equivalent to 100 billion kilometers or about 6.6 billion times the distance from the Earth to the Sun.

It's important to note that this is just an estimate and the actual length of DNA in a human body can vary depending on a number of factors.

For such more questions on DNA

https://brainly.com/question/16099437

#SPJ4

Answer:

Cell wall structure

Explanation:

The best characteristic that distinguishes Archaebacteria from Eubacteria is the cell wall structure. Therefore, the correct statement is option B.

Both Archaebacteria and Eubacteria are prokaryotic organisms lacking a nucleus and other membrane-bound organelles. They only differ in their cell wall structure. Archaebacteria have a cell wall composition where different types of lipids and glycoproteins are present.

The cell wall of Eubacteria is composed of peptidoglycan which is in contrast to the chemical composition of Archaebacteria. The cell wall of Archaebacteria lacks peptidoglycan.

The cell wall of Archaebacteria contains different molecules, such as pseudo peptidoglycan or S-layer proteins. Eubacterial cell walls consist of only peptidoglycan.

Therefore, the best characteristic that distinguishes Archaebacteria from Eubacteria is the cell wall structure.

Learn more about archaebacteria here:

https://brainly.com/question/2598723

#SPJ5

Neanderthals demonstrated several features that indicate cold adaptation, including robust body structure, large nasal cavities, and specialized cranial features.

Neanderthals, an extinct species of humans, inhabited regions with cold climates during the Pleistocene era. Their physical features indicate adaptations to survive in such environments. Firstly, Neanderthals had a robust body structure with stocky builds and shorter limbs, which helped them retain body heat in colder conditions. This body shape reduced the surface area-to-volume ratio, minimizing heat loss.

Secondly, Neanderthals had large nasal cavities, which are believed to have been advantageous in cold environments. The increased nasal volume allowed for the warming and humidification of cold, dry air before it reached the lungs, reducing the risk of respiratory issues caused by inhaling cold air.

Lastly, Neanderthals possessed specialized cranial features, such as a prominent brow ridge and a low, elongated skull. These features may have helped protect their faces and brains from the harsh elements, including cold temperatures and physical stress.

Together, these adaptations suggest that Neanderthals were well-suited to survive in cold climates by minimizing heat loss, protecting their respiratory systems, and providing physical protection. These cold adaptations were likely beneficial for their survival in the challenging environments they inhabited during their existence.

Learn more about Neanderthals here

https://brainly.com/question/29729712

#SPJ11

Answer:

Microbes, salts, and pollution from agriculture and industry all contribute to the problem. Global warming will likely have major impacts on the world's freshwater resources.

Explanation:

Water source protection involves the protection of surface water sources and the protection of groundwater sources from contamination of any kind. Water source protection includes basic measures and rules such as the installation of a fence around the source or the banning of grazing animals in the surrounding area.

Answer:

Community - different species

Ecosystem -  a community is a part of the larger ecosystem

Explanation:

A community refers to the population of different species living in a specific area, interacting with one another and their environment.An ecosystem, on the other hand, encompasses both the living (biotic) and non-living (abiotic) components of a particular area

The model represent the change in the DNA content of a cell during the cell cycle. The part of the model represents the S phase is phase II

What is cell cycle?

The cell cycle, also known as cell-division cycle, is described as the series of events that take place in a cell that cause it to divide into two daughter cells.

Before cell division and during the interphase, the cell DNA replicates. This event only occurs in the S phase, together with histones and other proteins synthesis.

In the attached image, we will notice a  graph showing the DNA content during the cell cycle, which is, how much DNA there is in the cell as the cycle goes on.

X axe ⇒ Phases ⇒   I, II, III phases

Y axe ⇒  Complete sets of DNA in the nucleus ⇒ 1 and 2 sets

The exponential growth occurs during the second phase, II. We can then  see how DNA content enhances from one single set to two sets of DNA.

Learn more about cell cycle at:  https://brainly.com/question/7196669

#SPJ1

The descriptions given can be classified as either bacterial or eukaryotic flagella.

Bacterial flagella are composed mostly of a protein called flagellin and are arranged in different domains such as the basal body, hook, and filament.

They move by spinning around and around. On the other hand, eukaryotic flagella are composed mostly of proteins called microtubulin and dynien and are arranged mostly as repeating protein units.

They move by whipping back and forth. The differences in the composition and arrangement of the flagella are due to the structural differences between bacterial and eukaryotic cells.

Understanding the differences between these two types of flagella is important for understanding the biology of bacteria and eukaryotic organisms.

To know more about eukaryotic flagella refer here: https://brainly.com/question/30704387#

#SPJ11

Answer:

Territoriality

Explanation:

In nature, agonistic or territorial conducts in animals result in fierce displays and sounds.

In the ecosystem, every organism resides in a marked region of its own.

Territoriality is the protected area of the animal which it has characterized as his.

It is the region which the animal safeguards from its opponents using fierce and adversary behaviours.

These kinds of demeanours display solitude, protection and self-identity.

To learn more about territoriality follow the link:

https://brainly.com/question/16613932

a. DIY DNA extraction methods typically use household ingredients and may lack specialized reagents for optimal yield, purity, and efficiency compared to extraction kits designed with standardized protocols.

b. Differences can be assessed through factors such as protocol complexity, DNA yield, purity assessment, and reproducibility of results between DIY and kit-based extractions.

a. The DIY DNA extraction and an extraction using a kit can differ in several aspects:

Ease of Use: DIY DNA extraction methods often utilize household ingredients and materials, making them simpler and more accessible for amateur scientists or educational purposes. Kits, on the other hand, are specifically designed with pre-measured reagents and detailed protocols, providing a standardized and user-friendly approach.

Efficiency and Yield: DNA extraction kits typically incorporate optimized protocols and specialized reagents that ensure higher efficiency and yield of extracted DNA. DIY methods may not always achieve the same level of efficiency, leading to lower DNA recovery or potential contamination.

Purity and Quality: DNA extraction kits generally include steps and reagents to remove contaminants (such as proteins and RNA) and ensure higher purity of the extracted DNA. DIY methods may lack these purification steps, resulting in impurities or degraded DNA.

b. A few indicators can help determine the differences between DIY DNA extraction and kit-based extractions:

Protocol Complexity: Comparing the step-by-step procedures of DIY methods and kit-based methods can reveal differences in complexity and the presence of additional purification or quality control steps in kits.

DNA Yield: Quantifying the yield of extracted DNA can provide insights into the efficiency of the extraction method. If the yield from a DIY extraction is consistently lower compared to a kit-based extraction, it suggests that the kit-based method may be more efficient.

Purity Assessment: Evaluating the purity of the extracted DNA can be done through techniques such as spectrophotometry or gel electrophoresis. If the DNA extracted using a kit shows less contamination or degradation than the DIY-extracted DNA, it indicates better quality control in the kit-based method.

Reproducibility and Consistency: Performing multiple extractions using both the DIY method and a kit and comparing the results for consistency and reproducibility can also indicate differences in performance and reliability.

It's important to note that DIY DNA extraction methods can be useful for educational purposes or preliminary experiments, but for more precise and standardized results, DNA extraction kits developed by reputable manufacturers are generally recommended.

learn more about DNA here

https://brainly.com/question/30006059

#SPJ11

Answer:

increased evaporation.

Explanation:

there is no methane in or near the process of evaporation.

hope this helps