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Directions: Read the passages and choose the best answer to each question.
Passage
Echinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.
The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.

Table 2 includes examples of echinoderm habitats around the world.
Q. A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?
  • a)
    Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.
  • b)
    Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.
  • c)
    No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.
  • d)
    No; sea cucumbers do not have a viable method of locomotion.
Correct answer is option 'B'. Can you explain this answer?
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Directions:Read the passages and choose the best answer to each questi...
According to the passage, “sea cucumbers are wormlike and tend to burrow.” Table 1 indicates that sea cucumbers feed by swallowing mud and sand, digesting any organic material, and ejecting whatever is left over. Sea cucumbers in large numbers could, simply by feeding, alter the physical and chemical composition of the sea floor. The other answer choices are not supported by the data.
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Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.Suppose scientists discover a new echinoderm that uses its tube feet to move across the deep-sea floor as it hunts for prey. This newly discovered echinoderm can most likely be classified as a(n)

Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.Based on the data provided in the passage, sea cucumbers most likely burrow in order to

Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.According to Table 1 and Table 2, crinoids can be found feeding on plankton

Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.The echinoderm shown below is most likely a

Directions:Read the passages and choose the best answer to each question.PassageNATURAL SCIENCE: A Short History of HomeopathyHomeopathy is a system for treating physical dis-ease and other ailments using the theory of treating“like with like.” In practice, homeopathic medicineseeks substances that mimic an ailment’s symptoms;(5) this sameness is considered “likeness.” The substanceis then diluted to infinitesimal amounts and admin-istered to the patient in order to cure the problem.Homeopathic treatment is currently in use for every-thing from cancer to colds and flu, though many(10) scientists remain heavily skeptical about its efficacy.Homeopathy was developed in the late 18thcentury by the German medical doctor SamuelHahnemann. Despite being a physician himself,Hahnemann was deeply skeptical of the medical prac-(15) tices of his time. In general, 18th century medicinewas founded on the theory of the four temperaments,or “humors”: Choleric, Melancholic, Sanguine, andPhlegmatic. These temperaments were based on thevarious possible combinations of hot and cold and wet(20) and dry. A choleric, or angry, disposition meant thata person had a constitution that was essentially hotand dry. Phlegmatic, or unemotional, persons werethought to be cold and wet. Melancholy was caused byan excess of cold and dry, whereas Sanguine, or(25) passionate, persons were hot and wet.Humors theory was first developed by theGreek physician Hippocrates, the founder of westernmedicine, and later expanded upon by Galen. When aperson became ill, doctors believed it was because one(30) or more of the humors had come out of balance. Someof the best treatments were thought to be bloodlettingand purgation —the assumption being that these treat-ments would effectively drain off the excess humors.Other popular treatments included blistering plasters(35) and emetics. Often the treatment proved worse thanthe disease. Many patients died from excessive blood-loss or were poisoned by unregulated medications. Inthis environment, Hahnemann’s skepticism was wellwarranted.(40) Hahnemann first stumbled upon his theory whenhe was investigating a common treatment for malaria,cinchona bark. Modern scientists now know thatcinchona bark contains quinine—a substance still usedto treat malaria—but at the time, no one knew why(45) the bark was effective. Hahnemann chose to imple-ment the concept of treating “like with like” by testingan undiluted dose of the bark on himself. Finding thathe had symptoms similar to those of malaria sufferers,Hahnemann concluded that effective drugs must pro-(50) duce symptoms in healthy people that are similar tothose produced by the diseases that the drugs wouldbe expected to treat. Hahnemann further hypothesizedthat, while undiluted substances would only worsensymptoms in the sick, heavily diluted substances could(55) be effective for a cure. The doctor and his colleaguesthen proceeded to test a variety of substances to seewhat symptoms they induced, in the hopes of find-ing cures for diseases with similar symptoms. Perhapsnot surprisingly, Hahnemann’s new field of homeopa-(60) thy (i.e. “similar suffering”) was met with considerableresistance from doctors comfortable with their usualpractices.In fact, Hahnemann’s methodology for scien-tifically testing potential treatments was remarkably(65) modern. Nevertheless, his conclusions remain extraor-dinarily controversial. One of the main points ofcontention involves the standard homeopathic prac-tice of heavy dilution to create the appropriate doseof a substance. Dilution of homeopathic substances(70) happens in stages. Hahnemann had hypothesized thatshaking the solution after each dilution would imprintthe molecular “memory” of the original substance intothe solution, which would allow the diluted dose to beeffective without the possibility of overdose or adverse(75) side effects.Modern scientists have been unable to find anyevidence to support the theory of molecular memory. Infact, the idea that diluting a substance makes it strongerruns against the principles of chemistry and physics.(80) Moreover, scientists point to a lack of standardizedclinical data on homeopathic treatment. Clinical studiesthat do show effectiveness indicate that homeopathiccure rates are generally equal to those of placebos.Today, many conventional medical practitioners(85) generally disregard homeopathy. Homeopathic prac-titioners are frequently termed quacks by conven-tional scientists. Nevertheless, homeopathy remainsextremely popular both in the United States and abroad.In European countries such as France and England,(90) conventional doctors frequently prescribe homeopathictreatments for common illnesses such as colds and flu.Pharmacists who are trained to answer questions aboutthe homeopathic treatments’ use and desired effectsthen fill the prescriptions.Q.According to the fifth paragraph (lines 63–75), Hahnemann hypothesized that heavily diluted substances remained effective because

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Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer?
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Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer? for ACT 2025 is part of ACT preparation. The Question and answers have been prepared according to the ACT exam syllabus. Information about Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for ACT 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for ACT. Download more important topics, notes, lectures and mock test series for ACT Exam by signing up for free.
Here you can find the meaning of Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Directions:Read the passages and choose the best answer to each question.PassageEchinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow.The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding.Table 2 includes examples of echinoderm habitats around the world.Q.A student hypothesized that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?a)Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.b)Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.c)No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.d)No; sea cucumbers do not have a viable method of locomotion.Correct answer is option 'B'. Can you explain this answer? tests, examples and also practice ACT tests.
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