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AlekseyPX
3 years ago
9

Early cells likely formed from a group of organic compounds, including proteins, and primitive fatty acids. Why do most scientis

ts think that the first true cells formed on Earth were anaerobic? A.because they could produce their own oxygen
B.because there was no oxygen on early Earth
C.because they make their own food
D.because they use less energy to find nutrients
Biology
1 answer:
nordsb [41]3 years ago
4 0
The reason why nost scientists thought  that the first true cells formed on Earth were anaerobic is being shown in the second option :B. because there was no oxygen on early Earth. Paying attention to this fact scientists discovered that first cells were prokaryotes and greatest part of them created oxygen as a toxic by-product of their own metabolism which make them understand how the planet was provided with oxygen and made a conclusion that first cells were anaerobic.
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nerve networks that include both sympathetic and parasympathetic fibers that reach the same structure are called nerve networks
Lelechka [254]

Central plexuses are the name for nerve networks with sympathetic and parasympathetic fibers that all travel to the same structur automobile plexuses.

<h3>What is the term for a sympathetic and parasympathetic network?</h3>

Involuntary physiological activities including heart rate, blood pressure, breathing, digestion, and sexual arousal are regulated by the autonomic nervous system, a part of the peripheral nervous system. Sympathetic, parasympathetic, and enteric are its three physically separate divisions.

<h3>Can a nerve have both parasympathetic and sympathetic functions?</h3>

Both sympathetic and parasympathetic nerves innervate several target areas (eg the heart, the iris muscle, some salivary glands, the gastrointestinal tract and pelvic organs).

To know more about autonomic plexuses visit:-

brainly.com/question/6575249

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4 0
1 year ago
Which part of the iceberg displaces water equal in weight to the buoyant force?explain.
ohaa [14]

The iceberg has weight Wi = Mig and the buoyant force is equal to the weight of the displaced water, Ww = Mwg. Furthermore, since the iceberg is floating, its weight exactly balances the buoyant force:


Ww = Wi
Mwg = Mig
VwRhowg = ViRhoig
Vw = Rhoi/Rhow Vi

So, the fraction of ice underwater, Vw/Vi, is given by the ratio of densities Rhoi/Rhow=0.87. Over 87% of an iceberg's volume (and mass) is underwater. As you can see, the convenient definition of the gram gives us a quick way to see how much of a floating substance lies below the surface of fresh water: the fraction is equal to that substance's mass density in g/cm?.

Summary

<span>Archimede's Principle of bouyancy states that the bouyant force on an object is equal to the weight of the fluid displaced by that object.<span>The underwater fraction of a substance floating on water is given by that substance's mass density in g/cm3.</span></span>
4 0
4 years ago
Help????????????????
amid [387]

Answer:

a. positive ion , +1

b. negative ion , -1

c. ionic

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Explanation:

sorry i'm in a rush i couldn't do the rest but use the internet

4 0
3 years ago
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nadya68 [22]

Answer:

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4 years ago
How does the ocean floor keep track of magnetic fields?
gayaneshka [121]
C.) Basalt is Iron-rich and responds to magnetic fields.
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3 years ago
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