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Svet_ta [14]
3 years ago
5

David's wife wakes him from a peaceful slumber to tell him that she heard a noise. As he slowly gets up to investigate, his hear

t begins to race, his mouth is dry, and he begins to sweat. Clearly, David's _____________ has been activated.
Biology
1 answer:
dusya [7]3 years ago
8 0

Answer: Sympathetic Nervous System.

Explanation:

The sympathetic nervous system is part of the autonomic nervous system. The sympathetic nervous system activates what is often termed the fight or flight response. The sympathetic nervous system directs the body's rapid involuntary response to dangerous or stressful situations. A flash flood of hormones boosts the body's alertness and heart rate, sending extra blood to the muscles. Breathing quickens, delivering fresh oxygen to the brain, and an infusion of glucose is shot into the bloodstream for a quick energy boost. The sympathetic nervous system allows animals to make quick internal adjustments and react without having to think about it.

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What is the difference between independent and dependent variables
trasher [3.6K]

The two main variables in an experiment are the independent and dependent variable.

An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable.

A dependent variable is the variable being tested and measured in a scientific experiment.

The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the effect on the dependent variable is observed and recorded.

For example, a scientist wants to see if the brightness of light has any effect on a moth being attracted to the light. The brightness of the light is controlled by the scientist. This would be the independent variable. How the moth reacts to the different light levels (distance to light source) would be the dependent variable.

When results are plotted in graphs, the convention is to use the independent variable as the x-axis and the dependent variable as the y-axis.

4 0
3 years ago
Plz help it due today
ankoles [38]

Answer: This is an opinion question so I will give you the facts so you can form your own opinion for this answer.

Explanation:

<u>PRO GMO:</u>

Manufacturers use genetic modification to give foods desirable traits. For example, they have designed two new varieties of apple that turn less brown when cut or bruised.

The reasoning usually involves making crops more resistant to diseases as they grow. Manufacturers also engineer produce to be more nutritious or tolerant of herbicides.

Crop protection is the main rationale behind this type of genetic modification. Plants that are more resistant to diseases spread by insects or viruses result in higher yields for farmers and a more attractive product.

Genetically modification can also increase nutritional value or enhance flavor.

All of these factors contribute to lower costs for the consumer. They can also ensure that more people have access to quality food.

<u>CONS of GMO</u>

Because genetically engineering foods is a relatively new practice, little is known about the long-term effects and safety.

There are many purported downsides, but the evidence varies, and the main health issues associated with GMO foods are hotly debated. Research is ongoing.

Some of the cons include: Allergies, Cancer, antibacterial resistance, and outcrossing which refers to the risk of genes from certain GMO plants mixing with those of conventional crops.

6 0
4 years ago
I need help in biology questions please G10?
Svetlanka [38]

Answer:

ok where is it

we can help only if there is something attached

7 0
3 years ago
Read 2 more answers
Which organisms would normally be the least numerous in this community?
grandymaker [24]
B. Krill
I hope this will help you that is the correct answer
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4 0
3 years ago
If a cell lacked ribosomes, it would not be able to
tankabanditka [31]

Answer:

build or break down proteins

hope this helps :)

4 0
3 years ago
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