1. Through blood transfusion
2. Unprotected sex
3. In contact of body fluids
4. Mother to baby during birth or through breast feeding.
This is true. DNA ligase catalyzes phosphodiester bonds. Which occur between the sugar molecules in polynucleotides. Nucleotides are the monomer to DNA, which contain a ribose sugar.. making DNA ligase able to join pieces of DNA together.
Cool air rising through warm air
Answer:
Option (4)
Explanation:
The earth is comprised of numerous lithospheric plates. This lithosphere is comprised of dozens of major plates and a few minor plates. These plates are constantly in motion over the less dense asthenosphere layer where the rocks tend to flow during deformation. This plate motion takes place due to the creation of convection current in the mantle region as a result of which the plates move under the influence of uprising magma. These currents are formed because of the heat supplied from the core of the earth.
Some of the major plates are Indo-Australian plate, North American Plate, South American plate and the Pacific plate.
Some of the minor plates include the Cocos plate, Nazca plate, and Caribbean plate.
Thus, the correct answer is option (4).
