Biology

Neurospora crassa was one of the first eukaryotic microbes to be adopted by geneticists as a model organism. It is a haploid fungus (n = 7) found growing on dead vegetation. When an assexual spore germinates, it produces a tubular structure that extends rapidy by tip growth, and throws off multiple side branches. The result is a mass of branched threads called hyphae, which consitute a colony. a) Give two reasons why Neurospora crassa lends itself well to its use as a model organism. b) Two albino strains of Neurospora crassa were isolated. When either one was mated with wild type (pink), it produced albino and wild-type. What can you deduce about the mutations on each of the albino strains? Your Answer:
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Electrical energy can produce many other types of energy.When electricity runs through an electric stove, what other type of energy is produced? A. mechanical energy B. chemical energy C. heat energy D. sound energy
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Which of the following is a correct application of one of Darwin's postulates to the Galapagos finch data from Case Study #2? A. All the birds, no matter their beak size, were equally likely to survive during the drought. B. Variation in beak size was present in the population of finches prior to the start of the study. C. Beak size is not a heritable trait. D. All the birds, no matter their beak size, were likely to have the same number of offspring during the drought.
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Explain the value or importance of using to International System of Units when describing motion. Provide an example that supports your reasoning.
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Some humans have genes that make them resistant to infection by HIV. Would human populations likely evolve differently in areas of the world where HIV infection rates are high?
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Describe three rolls a paleontologist performs in their job
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17. According to the Mohs Hardness Scale, what's the approximate hardness of topaz?A. 8B. 10C.9D.7
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LASIK, or laser-assisted in situ keratomileusis, is a surgical procedure on the eye that millions of people have undergone to improve visual acuity. It involves the use of a laser is to reshape the cornea in individuals suffering from astigmatism, near-sightedness (myopia), or far-sightedness (hyperopia). 1. How could changing the shape of the cornea affect ones visual acuity?
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when cells are grown in a laboratory, which factor can stop normal cells from dividing
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amino acids are used to build
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Research by Yu and Fu (2011) found that approximately _____% of dreams are reported to involve sexual activity.
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Archaeal genomes are typically organized as circular genomes. True or false
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Why should extra precautions against sun exposure be taken when boating?
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How is biotechnology being used in the fields of medicine, forensics, or agriculture? Choose ALL that apply.A) Gel electrophoresis is used for the separation and analysis of DNA, RNA and proteins, based on their size and charge.B) In the future, scientists hope gene therapy will allow doctors to treat a genetic disorder by inserting a gene into a patient's cells instead of using drugs or surgery.C) DNA sequencing may be used along with DNA profiling methods for forensic identification and paternity testing.D) Gene therapy is currently being used to correct genetic mutations by inserting functional genes in their place.E) Therapeutic cloning could allow an individual's own cells to be used to treat or cure that person's disease, without risk of introducing foreign cells that may be rejected.
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Unit Test21Active22 232425TIME REMAINING01:19:50Which type of scientific statement is defined as a statement of fact that is generally accepted to be true and universal becauseit has always been observed to be true?theoryprobabilitylawhypothesis
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Give an example of what could have happened if a known Gram negative sample looks like it is Gram positive? What about the inverse situation, where a known Gram positive sample looks like a Gram negative bacterial culture?
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Edgar cannot sleep because he is terribly worried about his research paper. So Edgar decides to get out of bed and continue working on the paper. Although he stays up to nearly 3 a.m., he is relieved that it is done and easily falls off to sleep. In the future, Edgar will be more likely to finish his work before going to bed so that he can avoid the worry and sleeplessness. Such behavior is an example of __________.a. positive reinforcement.b. negative reinforcement.c. punishment.d. classical conditioning.
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Researchers working with Rob Dunn set out to collect and identify microbes found in belly buttons. When the researchers began identifying these microbes, they found that the microbes represented a wide range of metabolic activities. For example, one microbe might be able to break down sugars found in the belly button for energy, but only in the absence of oxygen. What terms would you use to describe this microbe:________
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NEED ASAP!Is a cheetahs speed considered genetic variation? If so, what mechanisms would explain this variation?
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3. Photosynthetic organisms are usuallyO producersdecomposersO chemotrophsheterotrophs
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(first actual answer gets Brainliest)Look at the image of a plant. (image below)Which tropisms are best illustrated?A phototropism and positive gravitropismB positive gravitropism and hydrotropismC hydrotropism and thigmotropism D thigmotropism and phototropism
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When is mitosis complete
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The anemia resulting from a deficiency of either vitamin B 12 (cobalamin) or folate is caused by a disruption in DNA synthesis of the blast cells in the bone marrow that produces very large abnormal bone marrow cells called megaloblasts.O True O False
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At the zoo, you notice that the scientific name for a tiger is Panthera tigris. Later, you see that the lion is called Panthera leo. Given what you know about the hierarchal organization of life, these two organisms must share the same: _______-
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