Sponges are multicellular, heterotrophic, lack cell walls, and produce sperm cells, making them comparable to other creatures. They don't have genuine tissues and organs like other animals have.
What feature make sponges simplest animal?Because their bodies don't have organ systems or even tissues, sponges are regarded as one of the most basic organisms.
Instead, sponges are composed of a collection of cells that cooperate to help the sponge satisfy its daily needs.
Although sponges are formed of cells, those cells are not arranged into genuine tissues, making them exceedingly simple organisms. They are not segmented, have an asymmetrical body form, and are not symmetrical.
Sponge feeding is the sole feeding mechanism that separates them from other animals. Because they lack mouths, poriferans suck water through tiny holes in their external walls.
Therefore, sponges considered the simplest animals.
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Sponges are considered the simplest animals due to their basic cellular organization. They do not have true tissues, complex organs or a circulatory system, and rely on diffusion for gas, waste, and nutrient exchange. They represent an early stage of multicellular organisms.
Explanation:Sponges, belonging to the phylum Porifera, are considered the simplest animals due to their primitive cellular organization. Unlike other complex animals, they lack true tissues and organ systems. They represent an early stage of multicellularity and are thought to be similar to the potential ancestors of all animals: colonial, flagellated protists.
Sponges have a single or a few cell layers and they don't have a circulatory system. Instead, gases, nutrients, and wastes are exchanged by diffusion. A large central cavity, the spongocoel, is filled with water that enters from numerous pores in their body wall and flows out through a large opening called the osculum.
Despite their simple structure, sponges are highly successful organisms, having survived on Earth for over half a billion years. They depend on the intracellular digestive processes for their energy intake, a method that requires food particles to be smaller than individual cells. So, their nutrition is also based on a simple method compared to other organisms.
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A method used to make a clone or an identical copy of an entire multicellular organism is known as
Name the cell structures that are needed for photosynthesis and cellular respiration
Prokaryotic cells and eukaryotic cells reproduce by mitotic cell division. regardless of the type of cell, all cells must __________________ before they divide.
All cells including prokaryotic and eukaryotic cell reproduce by mitotic cell division. Regardless of the type of cell, all cells must duplicate their genetic material before they undergo division.
What is Cell division?Cell division is the process by which a cell undergoes division to form two daughter cells. Cell division occurs as a part of the cell cycle in which the cell grows and replicates its chromosome before undergoing cell division.
Cell cycle is divided into two phases: Interphase and M-phase. In the interphase of cell cycle, the cell prepares itself for the division and in the M-phase, the cell undergoes division. M-phase is divided into two phases: Karyokinesis and Cytokinesis. In the Interphase, the cell grows in size and duplicates its genetic material to form two daughter cells.
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Practicing three-point shots to improve free-throw accuracy contradicts the _________ principle of exercise.
Answer:
Specificity
Explanation:
What are the functions of red blood cells, white blood cells, and platelets?
Answer:
Red blood cells carry oxygen throughout the body, and white blood cells protect the body from germs or diseases. Platelets are part of cells and they help your body to stop bleeding by clotting the skin (exposed flesh).
Explanation:
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Why would exposure to certain temperatures and urea cause phycocyanin to form a precipitate? what is this precipitate?
The Phycocyanin forms a precipitate when exposed to certain temperature and urea, because the interface of the polar groups to the protein with water is the basis of their temperature. The hydrophobic connections are weakened in the cold, because of the defeat of stabilizing entropic factor which are more protruding at high temperature. The precipitate that is formed is a denatured protein precipitate.
Small lizards have difficulty defending their territory, but large lizards are more likely to be preyed upon by owls. which type of selection would act on body size in these lizards under these condition
Stabilizing selection would act on the lizard population, favoring medium-sized individuals who are able to defend their territory without becoming easy targets for owls.
The type of selection that would act on body size in the lizards given the conditions described is stabilizing selection. This form of natural selection favors the intermediate variants within a population, curbing the extreme variants. Small lizards struggle with defending their territory, suggesting a disadvantage at one end of the size spectrum, while large lizards are more easily preyed upon by owls, indicating a disadvantage at the opposite end. Hence, medium-sized lizards not too small to be unable to defend their territory and not too large to be a target for owls would likely be selected for.
Which of these tissues found in the lungs permits gas exchange by diffusion?
The tissue in the lungs that permits gas exchange by diffusion is the respiratory membrane, made up of the alveolar epithelium and capillary endothelium.
Explanation:The tissue in the lungs that permits gas exchange by diffusion is the respiratory membrane. This membrane is made up of several layers, including the alveolar epithelium and the capillary endothelium. These layers are thin and allow for the easy exchange of oxygen and carbon dioxide between the air in the alveoli and the blood in the capillaries.
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Which of the following is part of the order fish know as eels?
a American eel
b Electric eel
c Spiny eel
d Swamp eel
Answer:
A, the american eel.
Explanation:
Electric eels are elongated like an average eel would be, however they are actually a type of knifefish. Spiny eels are actually two different species that are divided by living in fresh/salt water, and swamp eels belong to the family Synbranchidae.
One factor that could account for a drop in the water table is
Answer: Less rain and snow
Explanation:
The water table is defined as the zone of saturation of upper surface.The level of water table is influenced by various factors.The reason for replenishment of water table is precipitation.The two main forms in which precipitation occurs is rain and snow.So, if there is less rain and snow level then the water table does not get replenished and its level falls down.Freshwater fish excrete nitrogenous wastes as _____. freshwater fish excrete nitrogenous wastes as _____. guano urea uric acid ammonia proteins
Freshwater fish excrete nitrogenous wastes as ammonia. freshwater fish excrete nitrogenous wastes as ammonia. guano urea uric acid ammonia proteins
Freshwater fish excrete nitrogenous wastes primarily as ammonia.
This is because ammonia is less toxic at the lower concentrations found in aquatic environments and can be easily diffused into the surrounding water, which dilutes it. In contrast, terrestrial animals often convert ammonia into less toxic substances like urea or uric acid before excretion.Freshwater fish excrete their nitrogenous wastes mainly as ammonia, which is less toxic in aquatic environments and can be easily diffused into the water. This differs from terrestrial animals, which often convert ammonia into urea or uric acid.The Minnesota Department of Natural Resources has introduced regulations that require the use of approved firewood in state parks, state forests and wildlife management areas. There is specific approved firewood for each area which can't be used in other protected areas. What is the most likely reason for these restrictions?
The regulations on the use of approved firewood in protected areas aim to conserve native biodiversity, prevent the spread of diseases and pests, and avoid wildfires. This is done by ensuring the firewood used is procured sustainably and is safe to use in the specific environment.
Explanation:The primary reason for the Minnesota Department of Natural Resources implementing regulations on the use of approved firewood in various protected areas is to protect and conserve biodiversity within these areas and to prevent the spread of diseases and non-native species, which could potentially harm indigenous wildlife.
Transporting wood from one area to another can introduce harmful pests, diseases and non-native species. Some wood might be illegally harvested from protected ecosystems, thereby leading to habitat destruction and endangering the survival of many species.
Moreover, improper use of fire can lead to unintended wildfires, which would be devastating to the protected environments. The use of officially approved firewood ensures it has been obtained in an ecologically sensitive manner, and is suitable for use in the specific environment without causing harm or disruption to the local ecosystem.
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The average baby will grow _____ inches in his or her first year.
What four main types of actions involve databases? briefly discuss each?
The four main actions involving databases are Creating, Reading, Updating, and Deleting (CRUD). Creating adds new data, Reading retrieves data, Updating changes existing data, and Deleting removes data.
Explanation:The four main types of actions that involve databases are Creating, Reading, Updating, and Deleting (often abbreviated as CRUD).
Creating involves adding new data to the database. This could be a new record or a new table. The Reading action refers to retrieving data from the database, whether it's a single piece of data or a whole set of records. Updating means changing existing data in the database. This could be as simple as changing one value, or as complex as making mass updates across multiple records. Finally, Deleting involves removing data from the database. This could entail deleting a single record, a group of records, or even a whole table. Learn more about Database Actions here:https://brainly.com/question/32136781
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__________ is a discredited pseudo-scientific theory of the brain that claimed that personality characteristics could be determined by examining bumps on a person's skull. somotology phrenology the barnum effect physiognomy
Your father has type b blood. your mother has type o blood. you get tested and learn that your blood is also type o. what does this tell you
What type of elder abuse is the most commonly reported?
How is dialysis tubing different from a cell membrane?
Dialysis tubing is a synthetic semipermeable membrane used in dialysis machines to separate small waste molecules like urea from larger ones like proteins and cells, while a cell membrane is a complex structure that regulates the entry and exit of substances with specific channels and transporters, and is also involved in signaling and maintaining cell integrity.
Explanation:How Dialysis Tubing Differs from a Cell Membrane
Dialysis tubing and cell membranes serve similar functions but differ in structure and selectivity. Cell membranes are complex biological structures composed of lipid bilayers and proteins that regulate the entry and exit of substances in a highly specific manner. By contrast, dialysis tubing is a simplified, synthetic material, such as cellophane, that acts as a semipermeable membrane. This membrane allows for the separation of small waste molecules like urea from larger molecules like proteins and blood cells through diffusion.
During hemodialysis, a dialysis machine uses a section of dialysis tubing to cleanse the blood. The dialysate solution and the blood flow on opposite sides of the tubing. Due to the concentration gradient, waste products move from the blood into the dialysate. Dialysis tubing is engineered with pores of specific sizes to facilitate this selective transport, mimicking the filtration process of the kidneys.
In contrast, a cell membrane's selectivity is not only due to pore size but also due to the presence of various channels, transporters, and receptors. Cellular active transport mechanisms, which require energy, further differentiate cell membranes from the passive process of diffusion through dialysis tubing. Moreover, cell membranes are involved in a wide range of cellular functions beyond selective transport, including cell signaling, maintaining cell structure, and interactions with the cellular environment.
4. How might Douglass' reliability as an author be called into question for his piece Narrative of the Life of Frederick Douglass?
Douglass' reliability as an author in his 'Narrative of the Life of Frederick Douglass' may be called into question due to his advocacy purpose, potential embellishments, and autobiographical nature.
Explanation:Douglass' reliability as an author might be questioned for his piece Narrative of the Life of Frederick Douglass due to the fact that he wrote his narrative to serve a specific purpose - to advocate for the abolition of slavery. While his experiences are real, the narrative may be perceived with caution because he may have embellished certain details or events to evoke stronger emotions in his readers.
Additionally, as an autobiography, there may be discrepancies in memory or the need to present himself in a certain light.
Based on this information, how is the ath operon most likely controlled
Why is there no single set of steps in the scientific method?
When a chamber of the heart fills with blood and prepares for the start of the next cycle, the heart is in?
Skin lung and blood vessel walls have which tissue characteristic in common
Skin, lungs, and blood vessel walls all share epithelial tissue, specifically an inner layer called the endothelium or tunica intima, which functions as a barrier and exchange surface. The walls of blood vessels consist of three layers known as tunics, with arteries having thicker layers to withstand higher pressure, while capillaries have only the endothelial layer to facilitate exchange.
Explanation:The skin, lungs, and blood vessel walls all have epithelial tissue as a common characteristic. This type of tissue is vital for providing a barrier and facilitating the exchange of substances. In blood vessels, this is exemplified by the presence of tunica intima, the innermost layer, which is composed of a simple squamous epithelium known as endothelium, and in some parts, a small amount of connective tissue.
In both arteries and veins, three tissue layers called tunics form the walls, consisting of the endothelium (tunica intima), middle layer of smooth muscle (tunica media), and outermost layer of connective tissue (tunica externa). However, arteries have thicker smooth muscle and connective tissue layers compared to veins to deal with higher pressure. Capillaries are slightly different as they consist only of the tunica intima layer, which facilitates the efficient exchange of gases and nutrients between blood and surrounding tissues.
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Suppose a species of nonpoisonous snake is dark-colored, and a species of poisonous snake is brightly colored. Predators recognize the bright colors of the poisonous snake and stay away from it, but they frequently feast on the nonpoisonous snake. Some nonpoisonous snakes, like the king snake look a lot like a poisonous variety. In this case, the king snake looks like the deadly coral snake. The king snake is not attacked by predators and survives.
This adaptation which allows for natural selection is called
A) mimicry.
B) evolution.
C) camouflage.
D) variation.
Answer:
The answer is A) Mimicry
Explanation:
Because the adaptation that allows for natural selection is called mimicry. Predators avoid the king snake, even though it is nonpoisonous, and it survives to reproduce.
Why is it not surprising that staphylococci are the leading cause of wound infections?
The band of nerves that connects the two hemispheres of the brain are called
jenny wants to determine if a new brand name washing machine is better than here old detergent. she washes ten dirty t-shirts with the new washing detergent. after washing, she thinks they are cleaner using the new detergent. what can she do to be sure the new washing detergent works better than the old detergent?
the hint is "Consider what Jenny is comparing the group treatment against."
How is alphonse different from most of the other kapos?
What inferences can you make regarding the pH of a particular part of the digestive system and the type and relative size of the carbon–based molecules that are broken down there?
The stages of perception occur _____. select all that apply.
almost simultaneously
overlapping one another