Challenging Biology Problems with Detailed Answers

1 It is hard to imagine how big a billion is. A billion is 1 000 000 000 (or one thousandmillion). There are 1 000 millimetres in 1 metre and 1 000 metres in 1 kilometre.How many millimetres are in 1 kilometre?
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there were a few kinds of birds that lived in the farm area. Predict what would occur if many kinds of birds bred in the birdhouse
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the process of retting softens the tissue and helps to separate the fibres true or false
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What would happen if there were no condensation stage in the water cycle?
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How is the population of the lionfish normally kept in check in its native habitat?
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Describe two types of phloem cells that make up phloem tissue and outline how their structureassists function.
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Urgent please and thank you
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How do wetlands reduce flooding and erosion? (Site 1)
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Which of the following is the largest?A. the UniverseB. the Solar Systemc. the Milky Way GalaxyD. the SunPlzzzz helppppp
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The apple tree receives 1000kJ of light from the Sun, but only uses 500kJ. Of this, only 250kJ are stored in the tree to be transferred through the food chain.a) Calculate the efficiency of the tree (2)b) State the ways in which the remaining energy has been transferred out the of the food chain (3)
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The apple tree receives 1000kJ of light from the Sun, but only uses 500kJ. Of this, only 250kJ are stored in the tree to be transferred through the food chain.a) Calculate the efficiency of the tree (2)b)State the ways in which the remaining energy has been transferred out the of the food chain (3)
1 Answer
Which of the following is the largest?A. the UniverseB. the Solar Systemc. the Milky Way GalaxyD. the SunPlzzzz helppppp
1 Answer
CRAZY REWARD FOR ANSWER AND 5 STARS FOR EVERY ANSWERThe apple tree receives 1000kJ of light from the Sun, but only uses 500kJ. Of this, only 250kJ are stored in the tree to be transferred through the food chain.a)Calculate the efficiency of the tree (2)b)State the ways in which the remaining energy has been transferred out the of the food chain (3)
1 Answer
Which of the following Solar System objects travels in an orbit around the Sun?planetsmoonsdwarf planetscometsasteroidsPlssss help!!!
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Why are ecosystems important for humans?
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Tropomyosin is a rod-shaped protein with a mass of 70 kDa and a sedimentation coefficient of 2.6S. Hemoglobin is a spherical protein with a slightly smaller mass of 65 kDa, but a much higher sedimentation coefficient of 4.31S. Which property of tropomyosin accounts for its slow sedimentation?a. high particle densityb. elongated shapec. high massd. low partial specific volumee. overall net charge
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When a comet is observed for the first time, astronomers enter information about its position, size, and motion into computer simulations inorder toOApredict its orbital path.B.estimate its brightness.OC.measure the length of its tail.ODanalyze it for animal life, Plzzzzzzzzzz helppppppp!! And ty:)
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You work for a zoo where you manage the breeding program for the cheetah. Your goal is to prevent inbreeding by obtaining mates from other zoos, making sure that your cats produce healthy offspring. In analyzing the genes of the cheetahs in all the zoo breeding programs, you notice very little variety of traits (alleles). Select all of the following conclusions which could be supported by your findings?a. All of the zoo cheetahs come from just a few common ancestors. b. The number of individual cheetahs currently in Zoos must be very low. c. The variety of trats found in wild cheetahs is very narrow, possibly due to only a few of the animals surviving some event or series of events in thepast. d. Even aner several generations, the baby cheetahs produced at your zoo wil show very ame geneto variaton.
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Maintaining fish populations preserves the ocean as a resource and isfundamental to protecting biodiversity."
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write a short note on plasma membrane
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Select the correct answer.The testosterone level in Brian's blood has dropped below the normal range. Which sequence of events will happen as a result?OA. The pituitary gland secretes the luteinizing hormone (LH), which stimulates the hypothalamus to secrete the gonadotropin releasing hormone (GnRH).Thisstimulates the testes to secrete testosterone.B. The hypothalamus secretes the gonadotropin releasing hormone (GnRH), which stimulates the pituitary gland to secrete luteinizing hormone (LH). Thisstimulates the testes to secrete testosterone.OC. The pituitary gland secretes the gonadotropin releasing hormone (GnRH), which stimulates the hypothalamus to secrete the luteinizing hormone (LH).This stimulates the testes to secrete testosterone.
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Which of the following is the independent variable in the hypothesis- "If you study harder, then your grade will improve."What class you are takingYour starting gradeThe change in your gradeThe amount you study
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What are not properties of enzymes
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True or False Some Crystals form from minerals dissolved in liquids
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