Biology Questions

In a certain plant, yellow leaves are dominant (Y) and red leaves are recessive (y). A plant with genotype Yy and a plant with Yy are crossed. If they have four offspring, how many would you predict would have red leaves?
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which factor decreases the rate of a chemical reaction? A. an inhibitor B. a co-factor C. increased substrate
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Can a biotic factors be composed of cells
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How did the discovery of the rhesus factor affect society? A. More patients died from having a transfusion with the wrong rhesus factor. B. New treatments during pregnancy could prevent harm to the developing child. C. Less donated blood could be used in the treatment of patients. D. The number of blood types was reduced by half.
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The ______ force is equal to the weight of the fluid displaced by an object. gravitational friction buoyant
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Describe the function of each of the following in protein synthesis: rrna,mrna,trna
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Which of the following statements is true about solar eclipses? There is a solar eclipse every month. All solar eclipses are total. Some solar eclipses are not total. There can be twelve solar eclipses in a single year.
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3. Which of the following effects do the sun and moon have on tides when they are nearly in line with Earth during a new moon? (1 point) They produce an extremely low tide. They produce an extremely high tide. They produce a tide with the greatest difference between consecutive low and high tides, or a spring tide. They produce a tide with the least difference between consecutive low and high tides, or a neap tide.
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A snail travels at a rate of 2.35 feet per minute. Write a rule to describe the function. How far will the snail travel in 5 minutes? A. d(t) = 5t; 11.75 ft. B. d(t) = t + 2.35; 7.35 ft. C. d(t) = ; 2.13 ft. D. d(t) = 2.35t; 11.75 ft. ************************
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Arrange the steps for measuring heart rate in the correct order from start to finish. a. Make a fist. b. Feel a pulse. c. Count for 10 seconds. d. Find a radial artery. e. Multiply by six.
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Nucleotides, which are the building blocks of nucleic acids, consist of a phosphate group, a nitrogenous base, and a _____________________. Lipid 5-carbon sugar Starch
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The organ that produces the egg cell in the life cycle of the pine is called the____? A.Ovules B.Antheridia C.Archegonium
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In one generation, the frequency of the A allele is 70 percent and the frequency of the a allele is 30 percent. What are the chances of an individual in the next generation having the genotype aa if the population is in genetic equilibrium? 49% 42% 30% 9%
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Which is the most common cause of erosion in deserts? liquid water ice wind plants
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Atomic mass is determined by the number of protons plus the number of _____. A. Electrons B. Neutrons C. Charges D. Atoms
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which of the following is a method used to obtain the absolute age of a rock or fossil? A.) Original horizontality B.) Radiometric dating C.) Superposition D.) Unconformities
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Most modern forms of transportation are powered by fossil fuels. Carbon dioxide, methane, carbon monoxide, and other gases are released into the atmosphere during the production and combustion of these fuels. How might these gases cause climatic changes? These gases have no effect on atmospheric temperatures, so they are unable to cause any type of climatic changes. These gases cause more water vapor to condense, making climates wetter than they were in the past. These gases reduce the amount of thermal energy escaping into space, effectively warming the atmosphere.
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The mass of an atom is contained primarily in its _____. A. Electron Shell B. Nucleus C. Proton D. Size
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