Answer:
C. He forgot to add primers.
Explanation:
The major components of a PCR include:
- A sample DNA which is the DNA that needs to be amplified.
- A DNA polymerase, an enzyme that synthesizes new DNA strands from the sample DNA.
- A primer which represents the starting sequence for the new strand of DNA to be synthesized.
- Free nucleotides in form of Deoxynucleoside triphosphates (dNTPs)
<em>The graduate student forgot to add primers which are essential as a starting point on which the synthesis of new DNA strand is based. DNA ligase is not needed for PCR, but during DNA replication.</em>
The correct option is C.
Answer:
SRY
Explanation:
Sex determination in mammals including humans is genetically and hormonally controlled.
Genetically gonadal sex determination is mediated by a gene called SRY. This gene is known as the mammalian Y-chromosomal testis-determining gene. It induces sex determination in males.
Recent studies revealed that SRY plays an important role in inducing Sertoli cells differentiation. The Sertoli cells, in turn, guide testis formation.
Therefore, in males, differentiation of testis is switched on by expression of the Y-linked SRY gene.
Glacial balance is the balance or imbalance between accumulation at the top of the glacier and loss or disposal at the bottom.
Glaciers (US: /ˈɡleɪʃər/; UK: /ˈɡlæsiər, ˈɡleɪsiər/) are thick masses of ice that are constantly moving under their own weight. Glaciers form where snow cover has outpaced erosion for years, sometimes centuries.
As it flows slowly and deforms under its own weight, it takes on features such as cracks and shellac.
As they move, they erode rocks and debris from their roots, forming features such as cirques, moraines, and fjords. Glaciers can flow into bodies of water, but they form only on land, unlike the much thinner sea and lake ice that forms on the surface of bodies of water.
learn more about Glaciers here. brainly.com/question/6666513
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It is true ! algin is derived from brown algae !