Fiddler crabs are invertebrates. That means they do not have a backbone (that's made out of vertebrae). Does this mean they don't have a skeleton?
Answers
Answer:
they do have skeleton which is called exoskeleton, main component is chitin
Fiddler crabs don't have a skeleton. Instead, they occupy a carapace, a rectangular shell. As they expand, the carapace is absorbed, and a new, larger one is produced.
What are invertebrates?
The paraphyletic group of animals known as invertebrates lacks the notochord-derived vertebral column and does not even develop one. Except for the chordate subphylum, all animals fall within this classification.
To assist remove food from sand, they frequently dine in a watery puddle. Because both of a female's claws are little, she has an advantage over a male in terms of finding and consuming food. Feeding is more challenging for older males due of their main claw.
Therefore, fiddler crabs don't have a skeleton.
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Related Questions
You are concerned about the rate of death in catfish your aquaculture operation in tanks that have a high amount of algae growth. You collect some of the algae and send it to the university to have it identified. You find that it is a blue-green alga called Anabaena. Anabaena is known to be toxic to fish. You design an experiment to test how much of the algae the fish can stand before they die. You obtain 6 large aquariums (all the same size) and fill them with water taken from a healthy catfish pond at your operation. You put each aquarium on the same bench in the laboratory, where the light and temperature values are identical. You let the water stand for one day before starting the experiment. In aquarium 1, you add 2 grams of algae and no fish. In aquarium 2, you add 20 small catfish and no algae. Aquarium 3 gets 20 catfish and 2 grams of algae, #4 gets 20 catfish and 4 grams of algae, #5 gets 20 catfish and 8 grams of algae, and aquarium #6 gets 20 catfish and 16 grams of algae. The aeration rate of each aquarium is identical. You make two observations at the same time each day for two weeks. You keep track of the numbers of fish in each tank that die.
What is the problem?
What is your hypothesis?
What is the independent variable?
Answers
Answer:
Hypothesis is ''With the increase of algae in the aquarium, fish population decreases''.
Explanation:
The main problem was that there is no need for 2 aquarium because there is no need for aquarium 1 which has no fish and aquarium 2 which has fishes but no algae. With the increase of algae in the aquarium, fish population decreases is the hypothesis for this experiment. Concentration of algae is the independent variable of the experiment because there is no effect on it in the experiment.
1. El corazón se localiza en el __________________, que es el espacio comprendido entre ambos pulmones. 2. El ________________________ es la capa funcional del corazón, puesto que su contracción impulsa la sangre hacia los pulmones y los demás tejidos. 3. Internamente el corazón presenta 4 cavidades: 2 cavidades superiores llamadas _________________ y dos cavidades inferiores conocidas como ________________ . 4. Entre la aurícula y ventrículo del mismo lado se encuentran las válvulas auriculoventriculares. En el lado derecho tenemos la válvula _____________, mientras que en el lado izquierdo se encuentra la válvula ____________ . 5. El ciclo cardiaco comprende dos fases, una de contracción o __________________ y una de relajación llamada ___________________ .
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Answer:
1. El corazón se localiza en el mediastino, que es el espacio comprendido entre ambos pulmones. 2. El miocardio es la capa funcional del corazón, puesto que su contracción impulsa la sangre hacia los pulmones y los demás tejidos. 3. Internamente el corazón presenta 4 cavidades: 2 cavidades superiores llamadas auriculasy dos cavidades inferiores conocidas como ventriculos . 4. Entre la aurícula y ventrículo del mismo lado se encuentran las válvulas auriculoventriculares. En el lado derecho tenemos la válvula tricuspide, mientras que en el lado izquierdo se encuentra la válvula mitral . 5. El ciclo cardiaco comprende dos fases, una de contracción o sistole y una de relajación llamada diastole.
Explanation:
El corazon es un organo con un tejido muscular liso especializado donde estas celulas musculares presentan uniones desmosomales de amplia conexion para la diseminacion rapida de señales, es asi como se producen contracciones ritmicas, autonomas y de manera simultanea.
El corazon a su vez presenta su auto irrigacion propia por medio de las arterias coronarias que se encargan de mantener el miocardo en buen estado de vitalidad.
an eagle is a carnivore it most likely gets energy it needs to reduce from
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Answer
Eagles, like other animals, get all their energy from the sun. ... Sunlight is the source of energy for plants. Using the sun's energy, green plants produce food through photosynthesis. Tiny plants called algae grow in lakes.
Explanation:
describe in detail the function of an umbilical cord
Answers
Answer:
the umbilical cord is considered both the physical and emotional attachment between mother and fetus.
Explanation:
this structure allows for the transfer of oxygen and nutrients from the maternal circulation into fetal circulation while simultaneously removing waste products from fetal circulation to be eliminated maternally.
It is okay to pick up broken glass with your bare hands as long as the glass is placed in the trash.
Answers
Answer:
Yes and no
Explanation:
It may be okay for if you are careful enough otherwise a cut may result to an infection.
No, it's not okay to pick up broken glass with your bare hands, as long as the glass is placed in the trash.
What are safety precautions?Safety precautions refer to routine actions like using equipment that is in good working order, wearing eye protection, cleaning up spills, having access to a first aid kit, etc.
To reduce the risk of injury, always pick up the shattered glass with a brush and dustpan, tongs, or forceps and drop it into a container intended for disposing of broken glass. Broken glass must never be handled with care and must never be thrown away with other garbage.
Therefore, no, you shouldn't pick up the shattered glass with your bare hands unless it has been disposed of. It can cause cuts and infections.
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How can the founder effect cause a previously rare genetic disorder to become common in the new population?
Answers
Answer and Explanation:
The founder effect is a special case of genetic drift.
The Founder effect refers to the consequences that occur from the origin of a new population produced by a small number of founder individuals that come from an ancestral bigger population. The new population originated from a few founder individuals, who came from a bigger population and that established in a new environment.
This small population might or might not be genetically representative of the original one. It might show poor genetic variation and hence, a high possibility of expressing a peculiar allelic composition. Some rare alleles might be in exceed or might be completely lost. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced and there is a high possibility of developing a peculiar allelic composition. If the number of individuals that originates the new population is very low, the founder effect will be very extreme, because the magnitude of this change is inversely related to the original number of the founder individuals. These changes produced by genetic drift accumulate in time, and eventually, some alleles get lost, while some other might set.
There are certain examples of the founder effect, such as Huntington's disease in South Africa or the Ellis syndrome characteristic of the Amish people from Pennsylvania.
how many cells are their.
Answers
Answer: 30,000,000,000,000
Explanation:
Humans are complex organisms made up of trillions of cells, each with their own structure and function. Scientists have come a long way in estimating the number of cells in the average human body. Most recent estimates put the number of cells at around 30 trillion. Written out, that's 30,000,000,000,000!
Learned it in class
Which of the following is the quality of a good scientific hypothesis?
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Select all that apply.
Which of the following are current human uses for chordates?
therapy
entertainment
food
research
affection
Answers
Answer:
all of these is the answer
Answer:food
Explanation:
Suppose i needed to measure exactly 15.0 mL of water for an experiment. Which graduated cylinder would be the best one to use, and why?
Answers
Answer:
A test tube would be used
Explanation:
The test tube refers to a laboratory device that is made of graduated glass for which cylinder used to measure small quantities of liquids that is from 5 mL to 2 L. The most suitable type of specimen must be chosen for measuring the liquid volume, in this situation that is a 15 mL. The specimen is shutdown to lower and has a support base.
Therefore the correct answer is a test tube.
Explain why you consider robots non living ?
Helppppp
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Answer:
Robots are non living because they are do not breathe and are not made of cells like living organisms. They are only artificial.
Explain how scientific inferences can be made from scientific observations?
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Answer:Their inferences are based on evidence that they collect during their investigations. Readers learn that scientists gather and interpret evidence and draw conclusions based on this evidence. Some scientists investigate things that they cannot observe directly.
Explanation:
PLZZZ HELP ASAP THANKS :)))
how can you tell if a property or change in matter is physical or chemical? Be sure to use complete sentences!
Answers
Answer:
See explanation.
Explanation:
Physical changes only change the appearance of the object/substance.
Chemical changes are irreversible and can change the chemical makeup of the object/substance.
You can also use your senses to tell: being smell, sight, etc.
I need help with this question. Please help me!
Why do organisms need enzymes?
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Hope this helped
Answer:
Hello maam :)
Explanation:
wat the other guy said
what is the relationship between social science, natural science, physical science, chemistry, and physics?
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Answer:
all are branches of science discovering about the world around us
Write a sentence about an independent and dependent variable you could test.
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Answer:
The more calories you consume, the heavier you will be.
Explanation:
Below are the seven properties of water that make life possible on Earth. Describe five of these properties and provide an example of each:
Hydrogen bonding, cohesion and adhesion, surface tension, heat of vaporization, specific heat, density, and universal solvent
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Answer:
Water in its liquid form has a boiling point temperature close to 100°C. As a result of the network of hydrogen bonding present between water molecules, a high input of energy is required to transform one gram of liquid water into water vapor, an energy requirement called the heat of vaporization.
Cohesion is responsible for the transport of the water column in plants. Adhesion is water attracted to other material.
Water has a greater surface tension than most other liquids because hydrogen bonds among surface water molecules resist stretching or breaking the surface.
Specific Heat is the amount of heat that must be absorbed or lost for one gram of a substance to change its temperature by 1*C.
Density is when hydrogen bonds in water expand as it warms and contracts as it cools. The hydrogen bonds keeps the molecules far enough a part to make ice have fewer molecules.
Explanation:
When you move the slide forward on the stage, in what direction does the "e" appear to move when viewed through the microscope?
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Answer:
it appears to move in the opposite direction
Explanation:
Please help me I am really struggling
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Answer:
gamma rays hope this helps
Explanation:
How would pepsin activity be affected if it were put in a neutral solution?
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Answer:
pepsin would either work at extremely slow pace or get denatured.
The activity of pepsin would be inhibited if put in a neutral solution.
Pepsin is one of the enzymes found in the gastric juice of the stomach. It is a protease that digests protein into polypeptides , which are intermediate products of protein digestion.
A neutral solution is a solution that contains hydrogen ions and hydroxide ions at equal concentration.
But Pepsin works best in an acidic medium which is provided by the hydrochloric acid secreted in the stomach.
Therefore when pepsin is put in a neutral solution, the activities would be inhibited.
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What are the precautions must be taken while measuring an object with the help of a scale?
Answers
Make sure to zero out the scale with the cup before pouring on it
in polar habitat what a climate and adaptation of plant
Answers
this is the answer ofadaption of plants
Answer:u
Explanation:u used my question to get points without actually answering
What elements does carbon bond with to make up life’s molecules?
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Answer:
Carbon bonds with elements such as hydrogen, oxygen, phosphorus, sulfur and nitrogen to form life's molecules
Explanation:
Carbon bonds with elements like oxygen, hydrogen, phosphorus, sulfur and nitrogen to form biomolecules.
What are biomolecules?Biomolecules are also called biological molecules. These are the numerous substances produced by the cells of our body and all other living organisms.
These molecules vary widely in range in their size and structure. They are also able to perform a wide range of functions. Carbohydrates, lipids, nucleic acids, and proteins are the four major types of biomolecules.
Nucleic acids form our genetic material. DNA or RNA present in our cells are formed from nucleic acids.
Proteins are a wide range of structural and functional molecules. Proteins form the structures of the cell membrane. They also form enzymes.
Carbohydrates and lipids are major sources of energy in our food. They also have various structures.
Therefore, Carbon bonds with elements like oxygen, hydrogen, phosphorus, sulfur and nitrogen to form biomolecules.
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What would be the correct ecological classification for the cockroaches? a. Producers b. Primary consumers c. Secondary consumers d. Scavengers / Decomposers
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Answer:
d.
Explanation:
scavengers/decomposers :)
Answer:
d
Explanation:
Which molecules are processed by the rough endoplasmic reticulum (ER)?
Answers
Answer:
c is the answet
Explanation:
The rough endoplasmic reticulum helps in processing of proteins, the correct option is D.
What is rough endoplasmic reticulum?Rough endoplasmic reticulum is a series of connected flattened sacs that form part of an ongoing membrane organelle within the cytoplasm of eukaryotic cells.
It plays an important role in protein synthesis as several ribosome are attached to its membrane giving it a rough texture.
Thus, the correct option is D.
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which statement best describes how an existing theory is often affected by the development of new technology
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Answer:
ringthibf
Explanation:
What type of relationship occurs between two animals with the same food source?
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Answer:
Mutualism
Explanation:
in mutualism the two organisms benfit from each other and cannot survive apart.
What group of organic molecules is made up of a sequence of an amino acid group a caboxyl group a hydrogen atom and a side chain bonded to the central carbon atom
Answers
Answer:
Proteins
Explanation:
Proteins are biomolecules that are made up of a sequence of amino acids. These amino acids are organic molecules that consist of a basic amino or amine functional group (-NH2), an acid carboxyl functional group (-COOH), a hydrogen atom and an organic side chain referred to as the R- group, which has a bond connecting it to the carbon atom at the center. Examples of amino acids are alanine, asparagine, glutamate, lysine and so on.
Proteins are important in building the human body system, they are also involved in DNA replication, metabolic reactions, transporting of molecules etc.
You get home from school and grab a bag of potato chips before settling onto the couch to binge watch your newest Netflix series. A few hours later, you notice that all of the chips are gone and you feel very thirsty. You get up to go to the bathroom before grabbing a drink and notice your urine is exceptionally dark in color. Apply what you know about osmosis to explain what has happen to the cells in your body. Include the name for the type of solution the cells were in after eating and how the cells attempted to maintain homeostasis despite these salty conditions.
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Answer:
Explanation:
Osmosis is the process in which the molecules of a solvent move from a region of low concentration to a region of higher concentration through a semi-permeable barrier.
While eating the chips, the salt content from the chips makes the surrounding solution of the cells to have an increase in salt concentration causing an hypertonic solution. An hypertonic solution is a solution that has more solute (salt) than the (solute in a) cell. This increase in salt concentration around the cells causes the cells to release water to neutralize the high salt concentration in the solution around the cell (in order to maintain homeostasis) which causes dehydration in the individual and hence making the individual to be thirsty. The body attempts to maintain balance by passing this excess salt out of the body in the form of urine hence the reason for the dark colour in the urine (because if the body doesn't rid itself of the high salt concentration, the cells could shrink and die as a result).
What is a control group
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Answer:
The control group is defined as the group in an experiment or study that does not receive treatment by the researchers and is then used as a benchmark to measure how the other tested subjects do.
Explanation: