1. Answer: If a muscle is placed in a solution containing calcium ions. Does the muscle contract? Substantiate. Answer: Skeletal muscle No. For muscle contraction to occur, the presence of Ca++ ions intracellularly is needed.

    Answer:

    If a muscle is placed in a solution containing calcium ions. Does the muscle contract? Substantiate.
    Answer:

    1. Skeletal muscle
    2. No. For muscle contraction to occur, the presence of Ca++ ions intracellularly is needed.
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  2. Answer: Organic matter in wastewater consumes a lot of oxygen to carry on various biological processes. It results in a reduction of oxygen levels In the surrounding air and thus can Increase air pollution. Consumption of oxygen by organic matter in wastewater is measured by BOD (Biochemical OxygenRead more

    Answer: Organic matter in wastewater consumes a lot of oxygen to carry on various biological processes. It results in a reduction of oxygen levels In the surrounding air and thus can Increase air pollution. Consumption of oxygen by organic matter in wastewater is measured by BOD (Biochemical Oxygen Demand). A higher level of BOD indicates a higher polluting potential of wastewater. It is important to reduce the BOD so that pollution can be reduced. Hence, aerobic degradation is more important than anaerobic degradation for the treatment of large volumes of wastewater rich in organic matter. BOD level is reduced by aerobic degradation which is carried out by floc. Flocs are associations of bacteria and fungi which form mesh-like structures. Flocs eat away most of the organic matter in wastewater and thus help in reducing BOD. Once BOD Is pulled down below a threshold level the sludge is ready for anaerobic degradation. 

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  3. One ova will be produced by one full-grown primary oocyte.

    One ova will be produced by one full-grown primary oocyte.

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  4. Answer: Proteases degrade the proteins present inside a cell (from which DNA is being isolated) if the proteins are not removed from DNA preparation then they could interfere with any downstream treatment of DNA.

    Answer: Proteases degrade the proteins present inside a cell (from which DNA is being isolated) if the proteins are not removed from DNA preparation then they could interfere with any downstream treatment of DNA.

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  5. Species that can tolerate wide range of salinity are called euryhaline.

    Species that can tolerate wide range of salinity are called euryhaline.

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  6. Answer: Ψw = Water potential is the sum of Ψs = Solute potential solute potential Ψp = pressure potential and pressure potential.

    Answer:

    • Ψw = Water potential is the sum of
    • Ψs = Solute potential solute potential
    • Ψp = pressure potential and pressure potential.
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