Some arthropods superficially resemble earthworms in that both groups have __________, yet the two are distinctly different because arthropods, but not earthworms, __________. View Available Hint(s)for Part A a distinct head and are bilaterally symmetrical; have true organs closed circulatory systems; have bristles a true coelom; are protostomes prominently segmented bodies; have jointed appendages
Answers
Some arthropods superficially resemble earthworms in that both groups have prominently segmented bodies, yet the two are distinctly different because arthropods, but not earthworms, have a distinct head and are bilaterally symmetrical.
Arthropods also have jointed appendages, which earthworms lack, and they have bristles and a true coelom. Furthermore, arthropods are protostomes and have true organs and closed circulatory systems, while earthworms are not protostomes and have a simpler circulatory system consisting of blood vessels. Arthropods are a diverse group of invertebrates that includes insects, spiders, crustaceans, and many other organisms.
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Related Questions
Summarize Marguilis's theory in your own words
Answers
Answer:
Lynn Margulis proposed the endosymbiotic theory. The theory states that eukaryotic cells evolved from a symbiotic relationship between free-living bacteria and a protist cell. A eukaryotic cell would go through phagocytosis and engulfs bacteria. This bacteria later evolved into either mitochondria or cholorplasts.
Using two examples, describe how Charles Darwin used observations of the world around him to develop his hypothesis about how species might change with the passage of time.
Answers
Answer:
Darwin observed that finches in the Galápagos Islands had different beak shapes which slightly varied among nearby islands
Darwin observed that tortoises in the Galápagos Islands belonged to the same species, although they were slightly different on each island
Explanation:
Darwin's observations as described above enable him to develop his theory of natural selection. Darwin thought that species could change over time to adapt to their environments and suggested that new species could originate from similar species. Darwin observed that individuals in a given population exhibited variations and they proposed that these variations could be accumulated gradually over long time periods. Then, Darwin proposed his theory of natural selection to attempt to explain these observations: individuals whose variations gives them an adaptive advantage to survive in their environments have more chances to reproduce, thereby these individuals will have more representatives in the next generations. Subsequently, the accumulation of gradual changes (variations) will lead to new species being formed.
Train a pull into the sation every 6 hours . The train B pulls into the sation every 3 hours . They both pulled thr sation at 3pm. When is the next time they with both pull into the sation at the same time?
Answers
Answer:
9 pm
Explanation:
A pulls into the station every 6 hours while B pulls into the station every 3 hours. Hence, for every time A pulls up, B must have pulled up twice.
They both pulled into the station at 3 pm. At 6 pm (3 pm + 3 hours), B would pull into the station while A would still be on the road. At 9 pm (3 pm + 6 hours), B will pull in once more while A will just be pulling up the first time since 3 pm.
Hence, the next time both trains will pull into the station at the same time would be 9 pm.
Pls someone help it's urgent discuss organic agriculture
Answers
Organic agricultural methods are internationally regulated and legally enforced by many nations, based in large part on the standards set by the International Federation of Organic Agriculture Movements (IFOAM), an international umbrella organization for organic farming organizations established in 1972.[12] Organic agriculture can be defined as "an integrated farming system that strives for sustainability, the enhancement of soil fertility and biological diversity while, with rare exceptions, prohibiting synthetic pesticides, antibiotics, synthetic fertilizers, genetically modified organisms, and growth hormones".[13][14][15][16]
Since 1990, the market for organic food and other products has grown rapidly, reaching $63 billion worldwide in 2012.[17]: 25 This demand has driven a similar increase in organically-managed farmland that grew from 2001 to 2011 at a compounding rate of 8.9% per annum.[18]
As of 2020, approximately 75,000,000 hectares (190,000,000 acres) worldwide were farmed organically, representing approximately 1.6% of total world farmland.[19]
Organic farming can be beneficial on biodiversity and environmental protection at local level. However, because organic farming has lower yields compared to conventional farming, additional agricultural land is needed elsewhere in the world, which means that natural land has to be converted into agricultural land. This can cause loss of biodiversity and negative climate effects that outweigh the local environmental gains achieved.[20][unreliable source?]
39. The process by which light is trapped and converted to chemical energy iscalledA. cellular respiration.B. photosynthesis.C. the Calvin cycle.
Answers
Photosynthesis is the process by which plants trap light energy through their pigments and together with carbon dioxide and water generate a carbohydrate (chemical energy).
That is, photosynthesis is the process in which light energy is converted into chemical energy in the form of sugars.
we can conclude that the correct answer is:
Answer:B. photosynthesis.
Two nucleotides on the same strand form a __________ bond while two complimentary bases on opposite strands form ____________ bonds. An a-t base pairing forms _____ such bonds.
Answers
Two nucleotides on the same strand form a Phosphodiester bond while two complimentary bases on opposite strands form Hydrogen bonds. An a-t base pairing forms 2 such bonds.
The constituent components that make up DNA's double-helix structure are known as nucleotides. Each nucleotide has a base in it. The four various colors you see here stand for the four different bases that might be used. Between nucleotides, a unique kind of covalent link known as a phosphodiester bond occurs. The two strands of DNA are formed by these phosphodiester linkages.
Hydrogen bonds are the bonds that develop between base pairs. Thymine and adenine make two hydrogen bonds, and guanine and cytosine form three hydrogen bonds. Therefore, we have concluded that hydrogen bonds are the type of binding that develops between base pairs in DNA to hold the two strands of a double helix together.
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during one month, a blood donation center found that 45.5% of the donors had the a antigen. 14.2% of the donors had the b antigen. 4.3% of the donors had the a antigen and the b antigen. 84.4% of the donors were rh . 87.4% of the donors had the b antigen or were rh . (a) find the percent of donors that have the a antigen or the b antigen. % (b) find the percent of donors that have the b antigen and are rh .
Answers
The percent of donors that have the a antigen or the b antigen is 55.9%.
The percent of donors that have the b antigen and are rh is 11.7%.
Let us assume a situation where A denotes the set of donors having A antigen, B denotes the set of donors having B antigen and R denotes the set of donors having Rh+ antigen.
n(A) = 45.8
n(B) = 14.2
n(A and B) = 4.1
n(R) = 84.7
n(B and R) = 87.2
a)The percentage of donors having A or B antigen is:
n(A and B),
= n(A) + n(B) - n(A and B)
= (45.8 + 14.2) - 4.1
= 55.9%
b)Similarly, n(B and R),
= n(B) + n(R) - n(B and R)
= (14.2 + 84.7) - 87.2
= 11.7%
Hence, required percentages are 55.9% and 11.7%.
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Ben measures the height of two bottles. One is 12 centimeters and the other is 15 centimeters. In millimeters what is the difference of the two heights
Answers
The difference in height between the two bottles is 30 millimeters.
To calculate the difference in height between the two bottles in millimeters, we need to convert the heights from centimeters to millimeters and then subtract one from the other.
First, we convert the height of the first bottle from centimeters to millimeters. Since there are 10 millimeters in a centimeter, we can multiply the height of 12 centimeters by 10 to get the height in millimeters:
12 centimeters * 10 millimeters/centimeter = 120 millimeters.
Next, we convert the height of the second bottle from centimeters to millimeters using the same conversion factor. We multiply the height of 15 centimeters by 10:
15 centimeters * 10 millimeters/centimeter = 150 millimeters.
Now that we have both heights in millimeters, we can calculate the difference. We subtract the height of the first bottle from the height of the second bottle:
150 millimeters - 120 millimeters = 30 millimeters.
Therefore, the difference in height between the two bottles is 30 millimeters.
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how does the body of a 100m sprinter produce energy for this event?
Answers
what is the key to limiting factors
Answers
What are examples of limiting factors?
Some examples of limiting factors are biotic, like food, mates, and competition with other organisms for resources. Others are abiotic, like space, temperature, altitude, and amount of sunlight available in an environment. Limiting factors are usually expressed as a lack of a particular resource.
Carbon forms a very large number of compounds. What characteristic of carbon
atoms allows the formation of all of these compounds? Explain
Answers
Answer:
The characteristics of carbon atoms to form with other carbon atoms allows the formation of all of the compounds.
What is the primary function of stems? A) Facilitation of gas exchange
B) Water absorption and movement
C) Maximization of photosynthesis by leaves
D) Reproduction
Answers
The primary function of stems is C) Maximization of photosynthesis by Leaves.
Stems are an important part of plants and play many roles, such as Providing structural support, transporting water, nutrients and sugars Between different parts of the plant, and storing food reserves. However, The primary function of stems is to support and maximize photosynthesis By leaves.
Leaves are the primary site of photosynthesis in plants, and stems play a Critical role in supporting and positioning leaves to maximize their Exposure to sunlight. Stems also transport water and nutrients from the Roots to the leaves, which are essential for photosynthesis.
While stems can also facilitate gas exchange and water absorption and Movement, these functions are not their primary roles.
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If the population of rabbits in this ecosystem decreased dramatically because of certain environmental changes, which organisms’ food supply would decrease?
A.
owl and snake
B.
jackal and wildcat
C.
green plant and mouse
D.
goat and wildcat
Answers
Answer:
A. Owl and Snake
Explanation:
A green plant cannot eat a rabbit. Neither can a goat.
B. could be the answer but I believe that A. is the answer because I'm positive that those animals eat rabbits.
Hope this helped :)
what is the difference between obligate and facilitative mutualists? obligate mutualists require a mutualistic relationship to survive, while facilitative mutualists do not require a mutualistic relationship to survive. facilitative mutualists interact with a few closely related species, while obligate mutualists interact with many species. facilitative mutualists require a mutualistic relationship to survive, while obligate mutualists do not require a mutualistic relationship to survive. obligate mutualists interact with a few closely related species, while facilitative mutualists interact with many species.
Answers
The difference between obligate and facilitative mutualists obligate mutualists require a mutualistic relationship to survive, while facilitative mutualists do not require a mutualistic relationship to survive, option A.
Simply put, mutualism is a partnership in which both species gain from one another. This connection might exist between two species or within a single species. Symbionts are the species with this association.
All living things, including humans, animals, birds, plants, and other microbes like bacteria, viruses, and fungus, exhibit mutual dependence. Symbiosis is a kind of mutualism.
Mutualism is a sort of interaction in which neither the host nor the symbiont suffer any negative effects. The duration of this partnership might be either longer or shorter. The word "mutualist" denotes that the host and the tiny partner are the other participants involved in the mutualism.
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A good example of a natural phenomena causing geographical isolation is the
-Mississippi River
-Sahara Desert
-Grand Canyon
-Great Pyramid
Answers
Answer:A
Explanation:because
Which of the following factors can limit photosynthesis by being either too high or too low?
a.
Light
c.
Oxygen
b.
Carbon dioxide
d.
Temperature
Answers
Answer: A) Light
Explanation:
Hey!! It's me again because why not!!
Answer:
Temperature
Explanation:
Which indicates the direction of diffusion of gases at the alveoli of the lungs?
Answers
The direction of diffusion of gases at the alveoli of the lungs is from the alveoli into the blood for oxygen and from the blood into the alveoli for carbon dioxide.
Diffusion of gases at the alveoli of the lungs is a process of gas exchange between the air in the lungs and the blood in the capillaries. Oxygen and carbon dioxide are exchanged during this process. The direction of diffusion of gases at the alveoli of the lungs is from an area of high concentration to an area of low concentration. The oxygen diffuses from the alveoli into the blood, and carbon dioxide diffuses from the blood into the alveoli. This is due to the difference in the concentration of oxygen and carbon dioxide in the alveoli and the blood. When oxygen diffuses from the air sacs of the lungs into the bloodstream, it binds with hemoglobin in red blood cells and is transported to the body's cells. Carbon dioxide is a waste product produced by the cells during metabolism, and it is transported in the bloodstream to the lungs for elimination from the body. When carbon dioxide diffuses from the blood into the air sacs of the lungs, it is exhaled from the body during breathing. The lungs are adapted to facilitate gas exchange by having a large surface area, thin walls, and a moist lining to aid diffusion. In conclusion, the direction of diffusion of gases at the alveoli of the lungs is from the alveoli into the blood for oxygen and from the blood into the alveoli for carbon dioxide.
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Complete question: Which of the following indicates the direction of diffusion of gases at the alveoli of the lungs?
A. Oxygen into blood, Carbon dioxide into blood
B. Oxygen out of blood, Carbon dioxide into blood
C. Oxygen into blood, Carbon dioxide out of blood
D. Oxygen out of blood, Carbon dioxide out of blood
Can someone please help me???
Answers
Answer:
Explanation:
can you take a better pic i may be able to help
Depending on the oil and whether the chemical were improperly dipoed of on the land, the chemical could end up in the ground water. The proce i known a leaching. It can occur on farm, indutrial ite, and landfill. Can you rewrite the entence
Answers
The process of leaching can occur on farms, industrial sites and landfills, where chemicals that were improperly disposed of on the land can end up in the ground water, depending on the oil.
What is Leaching?
Leaching is the process of extracting substances from a solid material by dissolving them in a liquid, either naturally or through an industrial process. This is commonly done by adding a solvent to a solid material, such as soil, and allowing the liquid to pull out the desired substances. Leaching can also be used to separate particles from a solution by adding a compound that binds to the particles and causes them to precipitate out of the solution.
In this case, chemicals improperly disposed of on the land can leach into the ground water, depending on the oil, because the oil can act like a solvent, dissolving and transporting hazardous chemicals into the ground water.
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In transport, molecules move from areas of concentration to concentration across a cell membrane, which requires no to be used. Diffusion, , and diffusion are examples of passive transport that the uses to move in and out of a cell.
Answers
In passive transport, molecules move from areas of high concentration to low concentration across a cell membrane, which requires no energy to be used. Diffusion, osmosis, and facilitated diffusion are examples of passive transport that the cell membrane uses to move molecules in and out of a cell.
What is passive transport? Passive transport is a type of transport that does not require energy, and does not require an external source of energy. Passive transport is the movement of molecules from an area of higher concentration to an area of lower concentration. This process is known as diffusion. Passive transport is also known as diffusion-driven transport.Passive transport is a natural process that occurs without any additional energy being supplied. It occurs as a result of the physical and chemical properties of the substances involved. The substances that are transported by passive transport are usually small molecules, such as water, oxygen, nitrogen, and carbon dioxide.The rate at which passive transport occurs depends on the concentration gradient of the substances, and the permeability of the membrane or material that the molecules are passing through. The concentration gradient is the difference in concentration between two areas. The higher the concentration gradient, the faster the rate of diffusion.The membrane permeability is the rate at which molecules can pass through the membrane. If the membrane is very permeable, then the rate of diffusion will be faster. If the membrane is not permeable, then the rate of diffusion will be slower.To learn more about passive transport refer to:
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3. Viruses reproduce on their ownTrueOFalse
Answers
Answer:
False
Explanation:
What process is typical of cancer?
A replacement of damaged cells
B DNA replication
C cellular death
D uncontrolled cell division
Answers
Answer:
D. Uncontrolled Cell Division
Explanation:
Fun Fact: Cancer can make mini cancer that can stack on top of itself.
Uncontrolled cell division is a typical characteristic of cancer.
• The normal cells varies from cancer cells in many ways.
• When a series of mutations takes place in the normal cells, it turns into cancer cells, that is, the cells start to grow and proliferate without any control.
• The normal cells stays in the region where they start, while the cancer cells possesses the tendency to spread and invade the distant and nearby tissues of the body.
• The development of cancer cells or uncontrolled cell division takes place due to an array of epigenetic and genetic changes. Some of these changes may be caused by carcinogens present in the environment or may get inherited.
Thus, correct answer is option D, that is, uncontrolled cell division.
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What did Aristotle observe to help him understand that Earth is round?
Answers
Answer:
Aristotle observed that only 50% of the stars are visible at one time, concurring that Earth is round because if not we would all see the same stars 100% of the time.
The study of how traits are
passed from parent to
offspring is known
Answers
- Is the study of how heritable traits are transmitted from parents to offspring.
What is Avogadro's number?
0 23 X 106
O 2.06 X 1023
O 6.02 X 1023
O 2
Answers
Answer:
6.02 × 10^23 is his number
Do the populations change very much, or are they in equilibrium? Explain.
Answers
Answer:
They are in equilibrium
Explanation:
This is because they compete for resources such as food,water,mates e.t.c. hence only the fittest survive.Also the organisms that die are replaced by newborn ones.An ecosystem can support a specific number of organisms without depleting its resources.
Water seen early in the morning only on the tip of a blade of grass is due to
A. Active transport
B. Turgor pressure
C. Capillary action
D. Root pressure
Answers
Water seen early in the morning on the tip of a blade of grass is due to D. Root pressure. This phenomenon occurs as water is pushed up from the roots to the tips of the grass blades, resulting in the formation of dewdrops at the tips early in the morning.
The water seen early in the morning only on the tip of a blade of grass is due to capillary action. Capillary action is the ability of water to move through small spaces, such as the tiny openings in the xylem vessels of plants. When the air is cool and the humidity is high in the early morning, water vapor in the air condenses on the surface of the grass blades. This moisture is then drawn up the blade of grass by capillary action, which is the result of the attraction between water molecules and the surface of the grass. This phenomenon is a beautiful example of how a tiny blade of grass can demonstrate the wonders of nature.
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A scientist determined the rate of an enzyme-catalyzed reaction by measuring the amount of product formed over time. The following curve was generated from the data collected. What is the most likely explanation for the change in the slope of the line between 4 and 6 minutes?.
Answers
A large amount of substrate had been consumed between 4 and 6 minutes, the line's slope changes.
What is an example of an enzyme-catalyzed reaction?The zymase enzyme converts glucose into ethyl alcohol, which is then produced together with carbon dioxide. Starch to maltose conversion: Diastase is the enzyme responsible for the conversion of starch to maltose. A series of processes, including non - covalent interactions substrate binding, geometric rearrangements of the enzyme in its bound state.
What characteristics differentiate an enzyme-catalyzed reaction?At its ideal temperature, a catalyst performs at the highest level of efficiency. At either side of the optimal temperature, the activity of the biological catalysts decreases. The pH of a solution is important for biochemical catalysis.
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Which of the following are the characteristics of all living things? (Hint= choose seven)
Question 1 options:
Contains genetic material
Creates or uses energy
Maintains homeostasis
Responds to the environment
Has organs and organ systems
Growth
Consumes food for energy
Reproduces
Answers
Answer:
b,c, d,e,f,g
Explanation:
I had it on a quiz
When discussing left and right in terms of anatomic locations, what do they refer to?
Answers
The left and right in the case of anatomy referred to the left and right side of the body of the subject and not the observer.
What is anatomy?It is a branch of biology that deals with the study of the structures of a living organism. In anatomy, the structures of the body are studied and described and it's not concerned with functional aspects.
It is of two types -
Observation of structures large enough to be observed by an unaided eye is called gross anatomy. It is done by dissection. Observation of microscopic structures is called microscopic anatomy and it simply calls for the use of a microscope.Therefore, if someone is studying anatomy, the right and left are described according to the subject they are studying.
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