Answer:
b, negative ... positive
Explanation:
Gel electrophoresis is a method used in molecular biology for DNA analysis. This method includes the separation of DNA fragments through the gel according to their size or shape under the influence of aplid electric current. Since the fragments of DNA are negatively charged, they will move from negative to positive end.
Small fragments will move faster than larger ones.
One of the major source of error is contamination of the DNA sample. This refers to the presence of foreign DNA in the sample of interest. As a consequence, the gel will have more bands.
Another errors might appear as a result of wrong concentration of the gel, wrong buffer pH, high/low concentration of dye etc.
Radiation is the mechanism of heat transfer by which heat travel in a straight line at the speed of light, allowing heat to travel through vacuums and air spaces.
Radiation in physics is the emission or transmission of energy in the form of waves or particles through space or matter medium. This includes:
- Electromagnetic radiation such as radio waves, microwaves, infrared rays, visible light, ultraviolet rays, X-rays, and gamma rays (γ)
- Particle radiation beams such as alpha rays (α), beta rays (β), proton rays, and neutron rays (with static energy non-zero particles)
- Acoustic Radiation such as ultrasound, sound waves, seismic waves (due to physical transmission media)
- Gravitational radiation in the form of gravitational waves, or waves of curvature of space-time
Radiation is often classified as either ionizing or non-ionizing, depending on the energy of the particles it hits.
Learn more about Radiation here : brainly.com/question/893656
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Answer:
C
Explanation:
A. is incorrect because the cell displayed is an animal cell not a plant cell, so it cannot photosynthesize. The organelle shown is actually the ER.
B. is incorrect because the structure labelled is the nucleus, not a vacuole. Vacuoles store substances like waste, not DNA.
C. Is correct because the pickle-like organelle is the Mitochondria, also known as the powerhouse of the cell due to cellular respiration taking place there.
D. Is incorrect because the cellular membrane of the animal cell is not rigid like the cell wall of the plant cell, instead it is more semi-permeable.
Hope I could help! :)
<span>1.Fold Mountains (Folded Mountains)
2.Fault-block Mountains (Block Mountains)
<span>3.Dome Mountains</span></span>
