All categories

4 years ago

Are scientific theories absolute truths? Why or why not?

2 answers:

8 0

A scientific theory can always be disproved if someone comes along with better evidence which shows another theory is true. However, most other theories are small improvements on existing ones. Evolution and natural selection (the theory that animals' populations change over time because their environment encourages specific different features for individuals that happen with mutation) was an improvement on the existing "theory" that animals were built to be fit for their environments. The earth rotating around the sun was a theory improving on the idea that the sun and the earth move around so that it looks like the sun moves around the earth. All of these happened because there was evidence, so while theories aren't always absolutely true, many modern theories are typically well-tested and if they aren't, they are usually refered to as hypotheses or models (although models can sometimes also be theories, like the Standard Model)

kotegsom [21]4 years ago

3 0

No because they’re theories. It’s an idea of someone that might be true but isn’t 100%

You might be interested in

In the process of beginning an action potential, the threshold refers to:

Dafna1 [17]

Answer:

Option (3).

Explanation:

The action potential may be defined as the change in the electric potential of the cell that helps in the propagation of the nerve impulse. The resting membrane potential of the cell is -70mV.

Threshold potential may be defined as the minimum potential required to transmit the nerve impulse. If the difference between the excitatory signal and inhibitory signal exceeds the minimum intensity, known as threshold. The propagation of nerve impulse occurs.

Thus, the correct answer is option (3).

4 0

3 years ago

Arrange the following structures from largest to smallest

elena-14-01-66 [18.8K]

Answer: Largest to smallest: Nucleus, Chromosome, Gene

Explanation:

Nucleus is the big shell that holds all the chromosomes

Chromosome is in the nucleus

A gene is part of the chromosome

6 0

3 years ago

) You treat some cells with a proteolytic enzyme that is too large to penetrate the cell membrane (Set 1). Another group of cell

Advocard [28]

Answer:

Proten W

Explanation:

SDS-PAGE gel is a method used for the separation of proteins in which proteins are separated based on their length (smaller proteins move faster through the gel, due to less resistance).

When treated with proteolytic enzymes, proteins are cut and become short fragment. This means that the fragments formed after the use of proteolytic enzymes, will move faster and thus, migrate a longer distance. Proteolytic enzymes in Set 2 cells will act only on plasma membrane proteins (because they cannot penetrate), while in Set 2 they will act on both, plasma membrane and interior proteins. Control group will have only the large fragments (not treated with enzyme).

Protein W travels the same distance on a gel of proteins from Set 1 and Set 2, but different than control group. It means that the proteolytic enzyme worked the same on Set 1 and Set 2.

3 0

3 years ago

Review the equations below used to describe photosynthesis and respiration (as provided in the background section of this experi

AleksAgata [21]

Answer:

Germinated seeds without leaves are used in the experiment in order to find good results.

Explanation:

It is very important to use germinated seeds without the presence of leaves in order to carried out the experiment because if the leaves are present, the process of photosynthesis started which automatically increases the rate of respiration of the seed. This test is performed in order to determine the rate of respiration not photosynthesis. So leaves will not used in the experiment in order to avoid any problem with the results.

5 0

4 years ago

Many scientists classify viruses as non-living. The single, MOST important reason why viruses are classified as non-living is th

Luba_88 [7]

B
______________________________

4 0

3 years ago

Read 2 more answers