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3 years ago

Define in the very simplest way (In your own words) a cell theory

Biology

1 answer:

VashaNatasha [74]3 years ago

6 0

Answer: the cell theory is all living things are made of cells, and cells create other cells.

Explanation: so basically there were these dudes who studied plants and animals, and one of them looked at animal tissue and saw cells. this leads to the theory that all living things are made of cells. hope this helps.

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According to Darwin's theory of evolution, how do new species evolve?

Vikki [24]

Answer:

According to Darwin's theory of evolution, new species evolved as a result of natural selection.

Explanation:

Darwin proposed that speciation could readily occur through the prolonged action of Natural selection.
Natural selection allows the 'survival of the fittest' i.e. a more fit organism will have a better chance of survival than the less fit one.
The result of Natural selection could be positive,negative or balancing.
Evolutionary process in which the genetic changes confer a higher fitness to increase frequency of the organism over time in population is called positive selection.
Evolutionary process in which genetic changes decreases the organism's fitness resulting in its disappearance from the population is called Negative selection.
It may happen that a mutation benefits hetero-zygotes but not homo-zygotes and alleles maintain a intermediate frequency in population.This evolutionary process is called balancing selection.

8 0

3 years ago

The p wave of the electrocardiogram is a signal from

Ratling [72]

The P wave of the electrocardiogram is considered as a signal from the DEPOLARIZATION of the atria in the heart. This depolarization drives the contraction of the atrial musculature.

An electrocardiogram (ECG) is a device that records the electrical activity of the heart. This record can then be used to diagnose different heart conditions.

The P waves occur when the sinoatrial node generates an action potential which is capable of depolarizing the atria.

This depolarization is then followed by atrial contraction and an increase of the pressure in the atria.

Learn more in:

brainly.com/question/1569437?referrer=searchResults

7 0

2 years ago

What are the dominant freshwater flora and fauna?

ArbitrLikvidat [17]

C.plants and amphibians

4 0

3 years ago

Almost 50 percent of water withdrawn in the US, is used up by thermoelectric power plants. The table below shows the amount of w

sp2606 [1]

Answer:

The number of thermal power plants increased between 1950 and 1975.

Explanation:

Here, the table that shows the amount of water withdrawn in billion gallons per year, between 1950 and 2005,

Year 1950 1965 1975 1990 2005

Amount 180 340 420 410 410

Since, 420 > 180,

Also, 50 percent of water withdrawn is used up by thermometric power plants.

Thus, thermal power plants in 1975 > thermal power plant in 1950

Therefore, the number of thermal power plants increased between 1950 and 1975.

Second option is correct.

Note : first option is incorrect.

Since, by the above table,

The least amount of water used by power plant is 180 billion gallons per year,

Thus, third option is incorrect,

Now, the table does not represents energy produced,

Fourth option can not be said correct.

3 0

3 years ago

Which is the main light-absorbing pigment for photosynthesis?

snow_tiger [21]

Photosynthesis is carried out in the chloroplasts which contain the green pigment chlorophyll. Chlorophyll is what gives plants their characteristic color and it works by capturing the energy that is in the sunlight that strikes the plant. Photosynthesis is important to life on Earth because grass uses photosnthesis to produce glucose, which is used within the grass for growth<span>. Subsequently, organisms that consume the grass obtain energy and so on. Therefore, photosynthesis is the process through which energy enters an ecosystem.</span>

8 0

3 years ago

Read 2 more answers