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vaieri [72.5K]
3 years ago
12

Where do well written experiments control the variables

Biology
1 answer:
fomenos3 years ago
5 0
In a controlled experiment, an independent variable (the cause) is systematically manipulated and the dependent variable (the effect) is measured; any extraneous variables are controlled. The researcher can operationalize (i.e. define) the variables being studied so they can be objectivity measured.
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Describe logistic population growth from a small population to a large one. be sure you talk about the population growth rate (t
gavmur [86]

When a population is small in a habitat, its population growth is exponential. This means it doubles its population with every generation. This is because there is plenty of resources and little competition between individuals of the population. However, as the population grows bigger, the population reaches carrying capacity (the maximum number that the ecosystem can hold). The growth slows and stagnates as stiff competition results to an equal death rate as birth rate.






5 0
3 years ago
How is it possible for organisms to undergo both punctured equilibrium and gradualism?
lawyer [7]

Answer: Gradualism and punctuated equilibrium are two ways in which the evolution of a species can occur. A species can evolve by only one of these, or by both. Scientists think that species with a shorter evolution evolved mostly by punctuated equilibrium, and those with a longer evolution evolved mostly by gradualism.

Explanation:

6 0
2 years ago
Which statement about the composition of membranes is TRUE? The inner and outer membranes of mitochondria have different protein
wel

Answer: Option A

Explanation:

The correct statement is that the there is a difference in protein which is found in the outer membrane and inner membrane of the mitochondria.

The inner membrane of the mitochondria is folded to allow maximum surface area for the energy production.

The inner part of the mitochondria contains the enzyme ATPase for energy production.

The outer membrane of the mitochondria contains enzymes for the export and import of the various materials with the help of  TOM40 complex and TIM23 complex.

4 0
3 years ago
QUESTION 16 Why does spoiled food become more sour? Spoilage microbes produce acid The nutrients in juice react with its packagi
galben [10]

Answer:

Spoilage microbes produce acid

Explanation:

When food becomes spoiled or is unprotected, bacteria will invade the food. These types of bacteria are called spoilage bacteria. The bacteria will multiply by consuming the nutrients from the food and grows very rapidly. In certain conditions, the invading bacteria will produce acids that protects them and creates a barrier for other microbes. This acid is what gives spoiled food a sour taste.

4 0
3 years ago
Byron’s car skidded across the rain-slicked road, into oncoming traffic. He was able to regain control and avoid an accident. As
andre [41]

Answer:

Parasympathetic nervous system

Explanation:

Parasympathetic nervous system (PNS) along with sympathetic nervous system (SNS) makes autonomic nervous system (ANS). ANS controls the functioning of internal processes like digestion rate, heart rate, respiratory rate etc. During a threat or stressful situation SNS is activated. It increases heart rate, respiratory rate and directs blood flow towards peripheral muscles as a part of "fight or flight response". When the situation becomes normal, PNS is activated which restores all the vitals as a part of "rest and digest" mechanism.

Since here Byron almost got into an accident, he was scared a lot due to which his SNS was activated. Eventually when he realized that he is out of danger, his PNS got activated which returned his heart rate and blood pressure to normal levels.

4 0
3 years ago
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