Answer: 1. mechanical weathering
2. Soil
Explanation:
1. Some animals such as moles dig which breaks down rocks underground.
2. Soil is different amounts of broke down particles some still have big particles like sand while others are really fine like clay.
I think the 4 major types of vectors are plasmids, viral vectors, cosmids, and artificial chromosomes. The most commonly used vectors are plasmids.
Hope this helps! ;0
Dna primase and Dna polymerase
Answer:
Negatively charged phosphate groups of two strands are aligned distantly from each other in a DNA double helix.
Explanation:
DNA double helix is formed when the complementary bases of two single DNA strands pair with each other. The formation of double-stranded structures places the negatively charged phosphate groups of two single DNA strands away from each other. This is because complementary base pairs are present between the sugar-phosphate backbones of two DNA strands of a double helix. The double-helical structure also concentrates the nitrogenous bases away from the surrounding watery medium. Altogether, these factors stabilize DNA dyad.
Answer: B boiling point
Explanation: To determine the mixture what given component is separated out from the mixture by its boiling point.
