You are studying enzymes in biology class. Hydrogen peroxide (H2O) is produced as a byproduct of respiration. Hydrogen
peroxide is harmful to cells and must be continually broken down. Catalase is an enzyme found in living cells that speeds up the
breakdown of hydrogen peroxide into water and oxygen (2 H2022 H2O + O2). You are working with your lab group to
investigate what factors influence the rate of the peroxide reaction. Your lab group is provided with liver samples as a source of
catalase, as well as 3% hydrogen peroxide.
You decide to investigate if adding more enzyme will cause the reaction to proceed faster. You set out to prove the hypothesis: if
more catalase is provided, then the rate of the peroxide reaction will be faster. What would be a good choice for your independent
variable?
A)
3,5, and 10 g samples of liver
measuring the amount of oxygen produced
1%, 3%, and 10% concentrations of hydrogen peroxide
10 ml, 20 ml, and 30 ml volumes of hydrogen peroxide
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Chinese privet is a plant that is native to china. over 150 years ago, chinese privet was introduced to the united states as a fast-growing shrub that serves as an excellent privacy hedge. with no natural herbivore, chinese privet quickly established itself and spread in natural areas throughout the southeast and eastern seaboard of the united states. its dominance in these areas has jeopardized the survival of native plant species. chinese privet provides evidence that introducing non-native organisms can cause environmental damage integrated pest management strategies will not decrease chinese privet populations american gardeners can easily control the spread of chinese privet non-native plant species have type i survivorship curves

You decide that the introduction should also discuss the extremophiles that are referred to as the archaea. these single-cell organisms are considered "extremophiles" due to their ability to survive and reproduce in environmental conditions that would be hostile for most living organisms. archaea species have been isolated from highly acidic sulfur springs, ocean floor thermal vents with temperatures that exceed boiling, and subarctic ice well below freezing. while still considered to be prokaryotic, the archaea have numerous differences that place them apart from the bacteria. choose the characteristics that separate the archaea from other prokaryotic cells. select all that apply. view available hint(s) select all that apply. archaea lack true peptidoglycan in their cell walls. the morphology of the cell is rigid and is geometric in shape, similar to a sphere or cylinder. the cytoplasmic membrane lipids of archaea have branched or ringform hydrocarbon chains. all currently identified and characterized archaea have been linked as the causative agent to an animal or human disease.

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point