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bixtya [17]
3 years ago
5

Rachel is using a Bunsen burner to heat a solution. Which of the following would let her control the rate of reaction in the sol

ution? A. replacing the amount of flammable gas used with different rates B. controlling the amount of air entering the combustion tube C. placing the burner in open surroundings
Biology
1 answer:
motikmotik3 years ago
5 0

Answer: b) controlling the amount of air entering the combustion tube

The rate of a reaction when using a Bunsen burner is changed by modifying the temperature of the flame.

In this type of burner, the temperature of the flame is modified by controlling the amount of air available for the flame. More air allowed will result in a hotter flame. This is achieved by turning the collar around the air holes.

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10 points! When looking out of my back door, I see robins, blue jays, finches, crows, hawks and owls all living in the same area
forsale [732]

The possibility for all of the mentioned birds to live all in a same area is because they are all specialized and occupy a certain niche in the food chain, thus not standing in each others ways when it comes to competition for food.

All of these birds have adapted to be able to survive in their respective environment, developing characteristics that will enable them to be superior in something. Through natural selection, the individuals that were performing better, got the chance to mate, thus the offspring was better adapted and stronger in its niche of the food chain.

The robins and the blue jays are birds that are very opportunistic in their food choice, thus giving them greater flexibility and ability to survive, they mostly feed on worms, insects, fruits, vegetables, so they have a big menu.

The finches are specialized in eating nuts and seeds, thus avoiding the competition with the previous two, thus having that food type for themselves.

The owls and hawks are both birds of pray, but the owls hunt mostly at night, while the eagles during the day. Also, the owls prefer to have rodents as their pray, while the hawks are mostly eating other birds, thus not standing in each other's ways.

8 0
3 years ago
•What are some examples of real-world applications that have improved our lives as a result of research where biology, neuroscie
zaharov [31]
Also referred to as behavioral and cognitive neuroscience, the field has been used to study child development in highly stressful environment compared to to others especially with regards to school learning. Other examples include its use in the diagnosis of irrelegular sleep disorder and insomnia
4 0
3 years ago
Which of the following statements are true regarding cellular reproduction? Select all that apply.
atroni [7]
Replacing dead cells
3 0
2 years ago
Read 2 more answers
When doing medical research with human subjects, which four limitations are un voidable?
viva [34]

The four limitations are

1.It's often impossible to repeat trials on the same subjects.

2-Subjects may report an inaccurate medical history.

3-It can be difficult to control all possible variables.

4-It's impossible to come up with testable scientific questions for human subjects.

Research involving human beings is ultimately necessary for improvements in human health and welfare. Any results about healthy physiology, illness causes, treatment effectiveness, learning, or behavior must be verified by carefully controlled investigations involving human participants. Sadly, not all human research have been valid and beneficial. It is possible to harm people in the name of research. The most well-known instances happened in Nazi Germany. Investigations conducted after the war found several crimes, including experiments in which participants were submerged in extremely cold water to determine how long it would take them to pass away from hypothermia.

Learn more about Medical research here

brainly.com/question/15215894

#SPJ10

6 0
2 years ago
suggest practical solutions on how any five of the youth risk behaviours which you have investigated can be addressed/reduced​
Digiron [165]

Answer:

1 Tell them with videos the real dangers and effects of everyone of the drugs

2 Tell the parents to speak to them

3 inform them of the danger of sexual relations with people the do not know well

4 tell them that under no circumstances they should drive if the drink alcohol

5 Talk to them about the immense possibilities they have in front of them and they will get their dreams true if they work hard , they are honest and respect people .

3 0
1 year ago
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