Asteroid impact
Volcanic eruptions
Explanation:
Asteroid impact and volcanic eruptions are two common events that could lead to a mass extinction.
A mass extinction is an abrupt decrease in life on earth due some catastrophic event.
- The collision of a large bolide on the surface of the earth is a catastrophe in itself.
- The collision and its aftermath have destructive consequences on life.
- The force of the collision can reverberate in form of vibration throughout the earth.
- It can cause heating of the earth surface.
- Volcanic eruptions can become global phenomenon that upsets the earth balance.
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Plants with just one cotyledon are said to be monocotyledons. They also include floral segments that are multiples of three. This implies that their blooms may be made up of sepals instead of petals, or they may have three, six, or nine petals. Additionally, they have accidental roots. These are roots that may sprout from nearly any portion of the plant that comes into touch with the soil, such as the stem.
For instance, garlic plants, spiderwort, etc.
Answer:
b. Forward or reverse primers
Explanation:
Sanger sequencing is a technique of DNA sequencing based on the extension of DNA fragments with variable sizes terminated with dideoxynucleotides at the 3′ end. This technique was developed by Frederick Sanger in 1977. In Sanger sequencing, a short primer is added in order to bind by complementarity to the target DNA region of interest. Subsequently, a DNA polymerase adds nucleotides (A, T, C and G) in the 5'-3' direction. Finally, the extension of the DNA strand is stopped by adding dideoxynucleotides, which are nucleotide analogs (i.e., modified nucleotides) that act as DNA synthesis terminators.
Answer:
cientists would use a control sample that has no DNA from bighead carp in Edna surveillance in order to verify that no DNA has contaminated the gel. It would eliminate certain errors in the experiment. What are some of the things that your DNA can be contaminated with?
Explanation:
