Master Biology with Fun Quizzes & Brain Teasers!

Assertion (A): A proton gradient cannot be established in the mitochondria. Reason (R): Hydrogen molecules are pumped out of an internal space (the matrix) in the mitochondria.Which of the following is TRUE for the above statements?
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A factory uses lake water as a system coolant, then returns the water, causing thermal pollution. Why is this a problem?A. The water returning to the lake carries chemicals from the factory.B. The water returning to the lake carries coolant toxins with it.C. The water returning to the lake carries pathogens from the factory.D. The water returning to the lake reduces oxygen levels in the lake.
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In the previous scenario, you looked closely at the effect of dominance and recessive genes. In this scenario, we will look at codominance. Codominance means that the alleles inherited from the parent gene are both dominant. Thus, the traits from both alleles are expressed. Look at the example below, we have one brown parent (RR) and one white parent (WW). All the offspring are White with Brown spots (RW).
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1. Where in the cell can DNA be found?a. In the nucleus of a eukaryotic cellb. It depends on whether it is an animal or plant cellc. In the cytoplasm of a eukaryotic celld. In the nucleus of a prokaryotic cell
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Commercial crabbero catch so many blue crabs that the blue crab population decreases.Which two populations are also likely to decrease as a result?A. AlgaeB. OtterC. SnailD. Terrapin
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Could you please help me put into words with the explanation of this question.1.In your own words, describe the base-pairing rules in any DNA molecule.
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Person 3 has a child with a male who does not have Huntington's disease.Which of the following Punnett squares correctly shows the possibilities of thiscouple's offspring? Why?
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In corn, the allele for yellow kernels (Y) is dominant to white kernels (y) and the allele for tall plants (T) is dominant to short plants (t). Which of the following statements best explains whythe cross YyTt x YyTT produces no short plants?A.Since all of the offspring will inherit a T allele from the second parent, all of the plants in the next generation will be tall.B.Since the trait for yellow kernel color masks the expression of the short trait, all of the plants in the next generation will be tall.C.Since the expression of the recessive trait tends to skip a generation, all of the plants in the next generation will be tall.D.Since the inheritance of the t allele is lethal, all of the plants in the next generation will be tall.
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Justify why carbon is considered the building block for life. In your response, be sure to use scientific vocabulary.
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(opening the door) describe the work of at least 3 body organ Systems that work during the process.
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Which is NOT an effect ofair pollution?A. acid rain from chemicals collectingin precipitationB. pesticides harming plantsC. smog or toxic/poisonous airD. affects producers ability tophotosynthesize
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Explain why every cell that is produced from the genetically modified bacteriumwill be able to produce insulin.
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As climate change has become a more looming threat, many countries are shifting to various sources of "clean energy." For example, Scotland generated enough wind energy in the first half of 2019 to power two Scotlands. Wind energy is usually harnessed through the use of wind turbines, as shown in the figure below. How does this become usable energy to power a country like Scotland? A) The potential energy of the wind is converted into electrical energy that we use. B) The kinetic energy of the wind is converted into chemical energy that we use. C) The kinetic energy of the wind is converted into electrical energy that we use. D) The static electricity in the wind is harnessed and accumulates until there is enough to use.
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In your words tell me What is the relationship between land-use in general and deforestation?
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Which of the following is NOT true regarding killed vaccines?a) Those vaccines are safe;b) Those vaccines are live attenuatedc) Organisms are killed or inactivated by heat or chemicalsd) All of the above are true
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Do cells produce all of the proteins for which the DNA code for? Why or Why not? How do the proteins made affect the type and function of cells?
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Please can someone help with question 8 of my practice questions please as Im struggling with that part
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Science is a broad subject that studies a wide variety of topics, but it has its limits. Science can only study things that can be tested. Which of the below choices could NOT be studied by science because they're not testable?Multiple choices can be correctYour answer:questions in the medical field like "Which vaccine is more effective?"questions about the supernatural like "Are ghosts real?"questions about the natural world like "Are viruses alive?"questions about pop culture like "Which music artist is the best?" questions about religion like "Is there a god?"Next
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Question is down below - match each term with description.
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What statement best explains why the skin cell and intestinal epithelial cells are different?
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What amino acid sequence will be generated based on the mRNA codon sequence 5' - ACUAUGCAUGCUUAA - 3'?A. Met - His - Ala - TyrB. Met - His - AlaC. Thr - Met - HisD. Thr - Met - Ala - Lys - TyrE. Thr - Met - His - Ala
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I just need help on the section where is says 8/9
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Ryan is writing a short summary, the topic is how the burning of fossil fuels creates global warming.Read below; *When the burning of fossil fuels release co2 into the air, the air traps the heat which stays in the atmosphere for a long time, which in turn causes climate change and global warming.Is Ryan correct? Yes or no? If not, explain what needs to be reworded so its more accurate^ when you answer, make sure you use your own original words, as I would rather you explain/clarify it for me, If you use someone elses words, make sure you reword it so it is more like your own
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Which depthcanlight penetrate to the ocean to?O 20 mO 500 mO 2000 mO 5500 m
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