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Alinara [238K]
3 years ago
14

What is a scientific theory?

Biology
2 answers:
pychu [463]3 years ago
7 0

Answer: scientific theory is an explanation of observations or events that is based on knowledge gained from many observations or events.

Zinaida [17]3 years ago
4 0

Answer:

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world.

Explanation:

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Describe 3 main differences between rna and dna
Sati [7]

Answer:

The three main differences between RNA and DNA is that (1) The sugar in RNA is ribose instead of deoxyribose, (2) RNA is generally single-stranded and not double-stranded , and (3) RNA contain uracil in place of thymine. ... The three min types of RNA are Messenger RNA, Ribosomal RNA, and Transfer RNA.

Explanation:

hope it helps : )

5 0
3 years ago
Open Ended Identify factors that can influence<br> enzyme activity. Describe the effect of each.
expeople1 [14]

<u>Temperature, pH, enzyme concentration, substrate concentration, and the existence of any inhibitors or activators</u> are a few of the variables that influence enzyme activity.

  • The rate of the reaction increases proportionally as the enzyme concentration rises. When diagnosing disorders, this feature is utilized to gauge the serum enzymes' activity.
  • The enzymes are highly sensitive to heat changes because they are proteins. Unlike typical chemical processes, enzyme activity is temperature-dependent. Each enzyme has a certain temperature range where it is more active, as you have seen. The ideal temperature, which falls between 37 and 40 degrees Celsius, is at this point.
  • When there is a certain amount of enzyme present, the rate of the enzymatic reaction rises as the concentration of the substrate rises until a limiting rate is achieved, after which additional increases in the concentration of the substrate have no effect on the reaction rate.
  • The most accurate way to estimate a solution's hydrogen ion concentration (H+) is to use the potential of hydrogen (pH). Additionally, it establishes whether the liquid is basic, acidic, or neutral. In general, liquids with a pH of 7 or lower are classified as acids, whereas liquids with a pH of 7 or higher are classified as bases or alkalines.
  • For optimal activity, several enzymes need specific inorganic metallic cations, such as Mg2+, Mn2+, Zn2+, Ca2+, Co2+, Cu2+, Na+, and K+. Anions are also occasionally required for enzymes.

learn more about enzyme activity here: brainly.com/question/13365011

#SPJ9

4 0
2 years ago
Can you please tell me an explanation of what happens in Cytokinesis please?
mylen [45]
Cell membrane pinches together in the middle. Cytoplasm and organelles are divide.
6 0
3 years ago
Read 2 more answers
Which statements explain the most likely cause of the difference between the hands of chimpanzees and those of gorillas? Circle
Verdich [7]

Explanation:

  • The exchange of pieces of DNA between alleles during sexual reproduction caused new combinations of DNA to form.
  • An individual had a genetic mutation that resulted in a hand structure with a selective advantage that was passed on to offspring.
  • Mutations in the enhancer sequences in chimpanzees resulted in the production of new activator proteins.

These species share a common ancestor-with their shared traits they derive from a single organism. Sometimes, they can vary in response to some environmental factors, called adaptations.

DNA mutations within chromosomes may have different forms named alleles. DNA, which forms the genotype, is transcribed into mRNA and then converted into amino acids that are joined together by rRNA to create the proteins that make up the anatomy of the organism.

Learn more about mutations at brainly.com/question/4602376

Learn more about DNA and RNA at brainly.com/question/2416343?source=aid8411316

#LearnWithBrainly

7 0
3 years ago
2. Which molecule should never be in the digestive system
pantera1 [17]

Answer:

<h2>The liver (under the ribcage in the right upper part of the abdomen), the gallbladder (hidden just below the liver), and the pancreas (beneath the stomach) are not part of the alimentary canal, but these organs are essential to digestion.</h2>

4 0
3 years ago
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