Master Biology with Fun Quizzes & Brain Teasers!

Becky wanted to figure out what type of liquid worked best for growing beans. She wateredone with coca-cola, one with lemonade, and one with just water. After one week, shemeasured how high they had grown.
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How are the health impacts of surface mining different from those of underground mining?1. higher risk of mine collapse in surface mining2. higher risk of lung disease in surface mining 3. Lower risk of hearing loss and surface my mining 4. Lower risk of minor injuries and service my mining
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Shifting biomes could have consequences for the regions in which the shifts occur. Read the two cases below and decide which consequences would apply to one or both cases.Case 1: The biome of a small agricultural community in the western United States changes from grassland to desert. A species of migrating duck, which can carry bird flu, goes locally extinct.Case 2: The biome in northern Russia changes from tundra to taiga. Timber harvesting in the region becomes possible. Arctic foxes go locally extinct and are replaced by red foxes that commonly carry rabies.Sort each consequence based on whether it would apply to Case 1, Case 2, or botha. increased risk of wildfiresb. local economy suffersc. carbon storage decreasesd. agricultural production decreasese. carbon storage increasesf. disease vector range changesg. decreased water availabilityh. local economy thrivesi. species range changesCase 1Case 2Cases 1 and 2
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What does a high population density indicate?O The area is being overfished.O The species is likely to face extinction.O There is no other place for that species to live.O Food supply is high and the number of predators low.
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A new fossil called Darwinius was discovered in Germany. It lived around 47 mya. It had a small brain, short snout, and postorbital bar. Its diet probably included a lot of fruit and leaves. It did not have a dental comb. It had nails instead of claws and was probably an arboreal quadruped. Researchers disagree about whether the fossil is more similar to living haplorhines (the group that includes tarsiers, Old and New World monkeys, apes, hominins) or more similar to strepsirrhines (lemurs, lorises)Required:a. Describe two features that the fossil shares in common with living haplorhines.b. Describe two features that the fossil shares in common with living strepsirrhines.
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You run 30 PCR cycles using primers that amplify a tandem repeat (let's call it D3T40) on Chromosome 3. Choose all of the statements below that are correct. A. The number of repeats at the D3T40 locus will vary among individuals.B. The size of an individual's amplicons is determined by the number of repeats at the D3T40 locus.C. The primers will anneal to the sequences that flank the D3T40 locus.D. Taq polymerase will amplify the entire length of Chromosome 3.E. About 30 amplicons will be produced at the end of 30 cycles of PCR.F. You can determine the size of an individuals D3T40 amplicons using gel electrophoresis.G. The size of the amplicons produced will vary among individuals.H. The primers used to amplify D3T40 could be used to amplify another locus like the D1S80 locus on Chromosome 1.
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6. The replication of chromosomes by eukaryotes occurs in a relatively short period of time because
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What is a fault line?
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Which of the following best describes the hydrolysis of carbohydrates
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In your opinion, should viruses be classified as living or nonliving? Be sure to use evidence from the chart in your answer.
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What is the three letter code found in mRNA?A. ThymineB. CytosineC. CodonD. Anti-codon
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What type of bond is found in region 2?A. Hydrogen bonds B. Peptide bonds C. Covalent bonds D. Enzyme substrate bonds
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Type the correct answer in the box. Spell all words correctly.What is Teddy's organization trying to accomplish?Teddy is working for a nonprofit organization that urges people to stop using products with CFCs. Through this Initiative, Teddy's organizationhopes to reduce the concentration ofin the atmosphere.
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This stadium can hold 100,000, or 1x10, people. Thenumber of atoms in a grain of iron is about 1x 1016,Would you need 1 x 10 or 1 x 10' stadiums to holdthe same number of people as the number of atoms ina grain of iron? Explain your answer,
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Most pneumonia infections are caused by a virus or bacteria. What characteristic could scientist use to distinguish an infection caused by bacteria from an infection caused by a virus? Group of answer choices The bacteria would grow by itself outside the person. The virus would have DNA. The bacteria would make another person sick. The virus would have proteins.
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help me with the one that is in blue
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PLEASE HELP MEEEEE QUICKLYYYYa group of students found the specific gravity of a pice of galena to be 7.8. The accepted value for the specific gravity of galena is 7.2 find the % of error in the student's work
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Aquatic organisms are able to survive when the temperature decreases. These organisms survive even when the surfaces of lakes and ponds are covered with ice. Which property of water best explains how aquatic organisms can survive during freezing temperatures?
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Spartina is a group of grasses that dominates communities of salt marshes in many coastal areas. Many of the insects, snails, birds, mice, and other animals found in these communities rely on Spartina for food, nest building materials, protection for their young, etc. The roots of Spartina also form dense mats that hold together soil in these ecosystems. Many species that live in Spartina salt marshes cannot survive outside of these unique ecosystems. Because living near the ocean is desirable to many humans, many Spartina marshes have been drained & cleared for human development. Analysis of the destruction that came when Hurricane Katrina hit Louisiana in 2005, however, showed that the reduction of salt marshes in coastal Louisiana was a contributing factor to the storm surge penetrating further inland. 1. The value of Spartina salt marshes in protecting coastal areas from storm surge would be classified as which type? A. Extrinsic.B. Intrinsic. C. Neither.2. The value of Spartina salt marshes in holding soil together would be classified as which type? A. Extrinsic.B. Intrinsic.C. Neither.3. In general, you would expect species that only live in Spartina salt marshes to have a higher extinction risk than species that can survive in urban areas. A. True B. False 4. Based only on the information included in this scenario, extinction risk for species that only live in Spartina salt marshes would be most influenced by which factor? A. Restricted geographic range.B. Narrow habitat requirements.C. Small population size.
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As the concentration of molecules outside a cell increases, more molecules will enter the cell because--
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Please help! I am so confused, please just help me understand this thing! I'm desperate
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Help wanted, if you could further explain that would help a lot too. If the function of an aquaporin is inhibited, how would the transport of water into the cell be affected? (3 points)A. Water molecules will no longer be able to cross the cell membrane.B. Water molecules will move across the cell membrane at a much slower rate.C. Water molecules will only be able to cross the cell membrane by active transportD. Water molecules will move across the cell membrane at a faster rate with late regulation from the aquaporin.
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PLEASE PLESAE HELP MEFungi are able to digest food outside of their body and then absorb it, what term describes this process?a). Absorptive heterotrophb). autotrophc). chemotrophd). carnivores
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Which structure is found in all eukaryotic cells?A-large central vacuoleB-ciliaC-flagellaD-Golgi apparatusPlease help!!!
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