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viva [34]
3 years ago
14

Give two examples of scientific theories.

Biology
1 answer:
Mice21 [21]3 years ago
6 0
Human come from apes.

Dinosaurs exist.

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A student wins a trophy. It is a metal cup on a black plastic base. The student cleans the trophy. She holds one of the metal ha
sineoko [7]

Answer:

  In this given statement , the plastic base becomes negatively charged because  plastic is an insulator . And the metal cup does not become charged because  metal is a conductor.                              

Explanation:

<u>Reason behind , why plastic base becomes negatively charged -:</u> When a plastic base is rubbed with a dry cloth in the metal trophy, electrons are shifted from one material to the other. Thus, the substance that gains electrons (which is the plastic base) becomes negatively charged. thus , the plastic is an insulator , which causes charge (negative ) by rubbing.

<u>Reason behind , why the metal cup does not become charged -:</u>  The metal cup is a conductor, and the surplus charge on the metal flows to the person who charges the cup and to the ground so that it is not charged. Thus, rubbing a metal can trigger hand\finger injury because metals generate excess heat in rubbing .

6 0
4 years ago
How do you think scientist know the carnivore was chasing pleurocoelus?​
Stells [14]

Answer:

Explanation:

in 600 bc carnivores began to chase for pleurocoelus because they realized it was great for their immune systems therefore they chased after them a lot.

5 0
3 years ago
Which nitrogenous bases are needed to complete the DNA strand pictured below?
Paul [167]

Explanation:

Template: T, A, C, G

Pairing: T- A, A-T, C-G, G-C

Answer: adenine, thymine, guanine, cytosine

Further explanation:

Nucleic acids are comprised of smaller units called nucleotides and function as storage for the body’s genetic information. These monomers include ribonucleic acid (RNA) or deoxyribonucleic acid (DNA). They differ from other macromolecules since they don’t provide the body with energy. They exist solely to encode and protein synthesis.

Basic makeup: C, H, O, P; they contain phosphate group 5 carbon sugar, these nitrogen bases which may contain single to double bond ring.

DNA stores all of an organism’s genetic information. Its molecules comprise the nitrogenous bases Guanine, Adenine, Cytosine and Thymine. These pair up as base pairs due to their varied structure- largely influenced by the location of N molecule ;

  • cytosine and thymine are formed from pyrimidines- N at position 1 and 3 of a fused ring;
  • Guanine and adenine are formed from organic compounds called purines (pyramidines fused to another organic ring of imidazole)
  • Each base pair contains a purine and pyrimidine joined via hydrogen bonding e.g. A-T & G-C and are called base complements.

In certain combinations, these bases form codons which act as instructions for protein synthesis. Codons are three nucleotide bases encoding an amino acid or signal at the beginning or end of protein synthesis.

Learn more about transcription at brainly.com/question/11339456

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

7 0
3 years ago
According to the lab safety sheet, which of the following is a potential hazard that will be present in the lab room during the
finlep [7]

Answer:

The current answer is a. Bacterial culture

Explanation:

Bacteria are used in epidemiology laboratory and bacteria can spread and cause disease if the correct lab procedures are not followed.

So according to the lab safety sheet bacterial culture is the potential hazard that will be present in the laboratory during the Epidemiology & Laboratory Techniques lab. There are different levels of biosafety according to the threat posed by the bacterial culture on which epidemiological study is going on.

The biosafety sheet helps in featuring the epidemiology of bacterial culture, transmission mode, availability of medical interventions, suggested biosafety levels, etc. So the right answer is a.

7 0
4 years ago
How is the height of a wave measured? A. from trough to water level B. from water level to crest C. from crest to trough D. from
Lina20 [59]
C is the answer, don’t forget to brainliest me
3 0
4 years ago
Read 2 more answers
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