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ivanzaharov [21]
4 years ago
8

Answer questions #1-3 based on the following scenario. Scientists tested the effect of a fertilizer on the growth of plants. The

y had 2 sets of plants, Group A which gets fertilizer, water and sun and Group B which gets only water and sun (but in equal amounts to Group A).
1) Explain how this sceniro is a controlled experiment and identify the manipulated variable

2)If the scientist only performed 1 experiment but it supported the hypothesis why can it not be considered a theory

3) The graph below was created showing the growth of the plant. How would you know that the y-axis is measuring the growth of the plant?
Biology
1 answer:
andrezito [222]4 years ago
4 0

1) The scenario is a controlled experiment because there were controls and a single experimental group in order to find correlations in data. The manipulated variable would be the fertilizer because it is the only factor different between Group A and Group B.

2) A one-time trial is not sufficient enough in terms of evidence to support a theory. Theories have numerous repetitions and replications to prove the correlation to be strong.

3) (The graph does not appear, but I can assume there are labels on the axes.) The labels on the graph's axes show that the y-axis is the plant growth over time.

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i do not know i will help you sooner or later thank u

4 0
3 years ago
The volume of a certain gas is 29.3 liters at STP. What would be the volume of the same gas at 1.39 atmospheres and -23.00C? (R=
Andrew [12]

Answer:

19.32L

Explanation:

Given parameters:

Volume of the gas at STP = 29.3liters;

      Using this information first, let us find the number of moles of the gas.

                  Number of moles = \frac{volume of gas}{22.4}

With the number of moles, we can further solve this problem;

                 Number of moles  = \frac{29.3}{22.4}   = 1.31 moles

More parameters;

Pressure on gas  = 1.39atm

temperature  = -23°C  = -23 + 273  = 250K

Unknown:

Volume of gas  = ?

Solution:

The ideal gas equation is the perfect fix to solve this problem.

It is mathematically expressed as;

              Pv  = nRT

where P is the pressure

           v is the volume

           R is the gas constant

            n is the number of moles

            T is the temperature

     Input the parameters;

             1.39 x V  = 1.31 x 0.082 x 250

                     V  = 19.32L

7 0
3 years ago
Disadvantage of external fertilization?
lisov135 [29]
It requires water to breed since the sperms requires water to swim
there might be zero chances of the sperm coming in contact with the eggs
a larger percentage of gametes unfertilised and are wasted
 there are a lot of environmental hazards
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igor_vitrenko [27]
Bison live in grasslands
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An injured victim is conscious and bleeding severely. after telling someone to call 911 obtaining consent and putting on disposa
marysya [2.9K]
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Pressing firmly against a bleeding wound, may counter the severe bleeding and may also stop the bleeding, since the pressure that causes blood to gush out, is given a counter pressure to stop. Using sterile dressing while doing this to an open wound may also prevent infection.</span>
8 0
3 years ago
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