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3 years ago

An explanation of a natural phenomenon supported by many observations and experiments over time

Biology

1 answer:

Ugo [173]3 years ago

3 0

Answer:

Explanation of a natural phenomenon, supported by many observations and experiments over time, corresponds to a scientific theory.

Explanation:

A scientific theory begins with the observation of a natural phenomenon and the formulation of a hypothesis that explains its existence, which must be proven through observation and experimentation.

The approach of a theory follows the scientific laws and must be established on the basis of rigorous experimentation and measurement, establishing a relationship between what is observed and what can be proven, in such a way that a theoretical principle is elaborated to provide an explanation of the phenomenon.

A theory is subject to the scrutiny of the scientific community and can be refuted, when other data or experiments appear to oppose it. When the argument of a theory cannot be refuted, and is universally accepted, it becomes a scientific law.

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Bacteria cells have a rigid cell ____ that gives it its shape

kvasek [131]

Answer:

wall

Explanation:

It is composed of peptidoglycan. The wall gives the cell its shape and surrounds the cytoplasmic membrane, protecting it from the environment.

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3 years ago

Question 4 .Which process is a physical change?

ohaa [14]

Explanation:

Which process is a physical change?

c. melting ice

If you break a piece of glass, the shape of the glass changes, but the properties in the fragments remain the same. Which of the following has occurred?

d. a physical change

A substance made up of two or more elements that have been chemically combined is called

c. a compound

Of the three ordinary states of matter, gas is the only state that

c. is highly compressible

In which state of matter do the particles have the most energy?

b. gas

Elements in group 18 called Noble Gases are highly reactive because they have 1 valence electron.

false

Atomic mass is the sum of

b. protons and neutrons

The current model of the atom is known as

a. Rutherford's model

Most elements on the periodic table are

d. metals

Which is not a quality of a non-metal?

a. shiny

Hope this helps.

3 0

3 years ago

10. Choose the correct option *

Zielflug [23.3K]

Answer:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.

7 0

3 years ago

Part A Which of the following statements regarding the umbilicus and the chin is true?

garik1379 [7]

D. The umbilicus is caudal to the chin

The terms caudal and inferior are synonymous, meaning "away from the head end or toward the lower part of a structure or the body; below." The umbilicus is caudal (inferior) to the chin.

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3 years ago

Provide an adaptive and a nonadaptive hypothesis for the evolutionary loss of useless organs, such as eyes in many cave-dwelling

Zepler [3.9K]

In order to be able to Provide an adaptive and a non-adaptive hypothesis, the following is required

<h3>What is adaptation?</h3>

It refers to a trait or an integrated set of traits that increases the fitness of an organism. It is the process of improving the fit of phenotype to environment through natural selection.

<h3>What is non adaptation?</h3>

it refers to those traits that do not result in the better adaptation of the organism to its environment, and does not increase the genetic fitness of the organism.

Let us take the case of vain organs. There may be a metabolic value to constructing a vain organ, and subsequently the humans who have misplaced that organ might also have a selective advantage. Also, if the organ is useless, the mutations that disrupt the improvement of that organ would be evolutionarily neutral, and may want to unfold to fixation via genetic drift.

So an adaptive hypothesis as to why an organism may lose useless organs is energy trade offs. The organism may additionally be losing energy in growing and retaining a vain organ, whilst this strength can be higher used someplace else. So an organism that lives in a darkish cave might also sooner or later lose its eyes considering eyes are of no use inside a darkish cave.

A non adaptive hypothesis for the evolutionary loss of organs can be random mutation. If a random mutation occurs that causes an organism to lose its eyes, in a dark cave where it does not use its eyes anyway, it could still survive, reproduce and pass that mutation down.

For more information on adaptive hypothesis, visit

brainly.com/question/975242

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3 years ago