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OAE Biology - Reviews


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Based on 85 reviews

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"Today I took my test and passed with confidence. I took it the first time and failed, but after purchasing this study guide, I was provided with resources that allowed me to take the test and get through it without being nervous. Allot of the questions that were provided in this study guide, were similar to the questions in the real test. I would suggest anyone who is looking for a study-guide to get this, because it well worth your money and time! -Stephanie "

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See why our users from 154 countries love us for their exam prep! Including 85 reviews for the OAE Biology exam.

Exam Edge is an industry leader in online test prep. We work with institutional partners to offer a wide array of practice tests that will help you prepare for your big exam. No matter how niche your field of interest might be, we're here to help you prepare for test day.

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OAE Biology - Test Reviews Sample Questions

 All of the following are considered serious weaknesses of the fossil record as evidence for evolutionary hypotheses EXCEPT:

Correct Answer:
 scientists can't be sure what is a fossil and what is a normal rock formation


the question asks to identify which statement does *not* represent a serious weakness in the fossil record as evidence for evolutionary hypotheses. the correct answer, "scientists can't be sure what is a fossil and what is a normal rock formation," is not a weakness because, in reality, scientists are quite adept at distinguishing fossils from ordinary rocks.

geologists and paleontologists are trained to recognize the characteristics of fossils, which are the preserved remains or traces of organisms. fossils generally have distinct features that can be identified by visual inspection and textural differences compared to surrounding rock formations. for example, a fossil might preserve the shape of a bone, a shell, or a plant, including intricate details that are not typically found in non-organic rock formations.

in cases where there is doubt, modern technology and methods come into play. techniques such as scanning electron microscopy, x-ray diffraction, and various forms of spectroscopy can be used to analyze the chemical and physical properties of a specimen to confirm its biological origin. additionally, fossils often occur in specific types of rock layers known as sedimentary layers, which themselves offer clues about the organic origin of embedded structures.

other options in the question do point out real limitations of the fossil record. the rarity of fossilization, the fact that fossils are often hard to locate, and the infrequent preservation of soft tissues are all factors that complicate the use of the fossil record in studying evolutionary processes. these conditions create gaps and incomplete pictures of the past biodiversity and evolutionary transitions.

therefore, the ability to distinguish between fossils and rocks is not a weakness of the fossil record. instead, it’s a testament to the advanced techniques and skills that scientists bring to the study of paleontology, allowing them to extract valuable evolutionary evidence from the available fossil data despite its inherent limitations.

 Which of the following green algae is also called "sea lettuce"?

Correct Answer:
 ulva


ulva, commonly known as "sea lettuce," is a genus of green algae that is particularly notable for its bright green color and lettuce-like appearance. the name "sea lettuce" aptly describes its broad, thin sheets that resemble the leaves of terrestrial lettuce. this marine alga is predominantly found along rocky seacoasts where it forms a part of the intertidal and subtidal zones.

structurally, ulva is interesting because it is composed of two layers of cells, making it surprisingly robust despite its delicate appearance. this thin yet tough structure allows it to withstand the mechanical stress caused by waves and currents. the alga is not only able to survive but thrives in these challenging environments, often forming extensive mats that cover rocks or the sea floor.

ulva plays a significant ecological role in its habitat. it provides food for a variety of marine animals, including fish, sea urchins, and crustaceans, making it a crucial component of the marine food web. additionally, ulva can also be used by humans as a food source, especially in asian cuisines, and is known for its high vitamin and mineral content.

the alga has a simple method of attachment; at its base, ulva possesses a group of cells known as holdfasts, which help anchor it firmly to rocky substrates. this anchoring mechanism ensures that it remains secure in its habitat, allowing it to grow and propagate efficiently. this attachment is crucial for its survival, as it prevents the alga from being washed away by the sea's movement.

ulva's ability to propagate and spread rapidly under suitable conditions makes it an important species for studies on algal bloom dynamics. these blooms can have both positive and negative effects on local marine ecosystems, depending on the environmental conditions and the balance of species within the ecosystem. thus, understanding ulva's growth patterns and ecological impacts is essential for marine conservation efforts and for maintaining the health of coastal environments.