<h2>Answer:</h2>
The correct answer to the Briana question is <em>option A which is a wavy arrow that shows Photo system I.</em>
<h3>Explanation:</h3>
- Photosytem II is light depending system, which absorbs light energy and generates electrons and hydrogen and oxygen ions from the break down of water molecules.
- While these electrons are the input for photosystem I which is light independent system.
- NADP+ receive electron and hydrogen ions at the end of photosystem I, not at the end of photosystem II.
Answer:
They act as barriers whereby wind deposits its load to come up with major land forms in the desert.
Explanation:
Sand dunes retain the load that arises as a result of erosion processes ,and disposition.
Wind deposits con form hills and sand sheets .
An example of this is in California , whereby Sand dunes make up to 25 % of the land-forms in the arid areas .
Sand dunes can also influence the formation of oases , as a result of wind action.
<h3><u>Answer;</u></h3>
is a relationship between distance and velocity
<h3><u>Explanation;</u></h3>
- According to Hubble's Law the recessional speed of a galaxy is directly proportional to its distance.
- <em><u>The Hubble Constant is the unit of measurement used to describe the expansion of the universe, it is the relationship of the recessional speed of a galaxy and its distance.</u></em>
- The formula showing the relationship is given by the formula:
v = Hd, where: v = velocity of a galaxy, in km/s. H = Hubble Constant, measured in km/s/Mpc and d is the distance in km.
Answer:
The heat sensitive polymerase would be denatured resulting in formation of little or no PCR products.
Explanation:
PCR is a technique that forms multiple copies of a small DNA sample. For the purpose, the DNA sample is exposed to very high-temperature conditions (around 95 degrees C) to facilitate the denaturation of DNA helix. These high-temperature conditions denature enzymes such as heat-sensitive DNA polymerases. Therefore, no or very little DNA molecules will be formed by the end of the process as the denatured DNA polymerase would not be able to extend the primers.
To avoid these conditions, heat-tolerant Taq polymerase is used in PCR which can withstand the extremely high-temperature conditions of PCR.