Answer:
The correct answer is: exonuclease activity.
Explanation:
DNA Polymerase is an enzyme of critical importance for the replication of the DNA. DNA needs to be replicated so, when entering Mitosis, each daughter cell can have a copy of the genetic material they need.
DNA Polymerase has an exonuclease activity in which mismatched nucleotides are removed from the newly replicated DNA strand in order to prevent mutations that can lead to malfunctioning or harmful proteins.
the tree is 24 years old. The inner part of the stem of the tree has a part referred to as cambium. Each year cambium produces high number of cells with thin cell walls when tree is highly active. These cells form the light-colored rings. When tree is less active cambium synthesizes few small cells with thick walls. The region occupied by these cells appear as a darker ring on the cross section of the stem. These two processes occur in the same year and as result each growth year is characterized by a ring consisting of a light and dark parts.
Various environmental factors affect the marine ecosystem. These factors include light, oxygen levels, depth of ocean, salinity, density and pH. These factors are varies with depth in the ocean these factors will either support or limit the life processes of the marine organisms.
The region in the depth of ocean up to where light can penetrate is called photic zone which extends from few meters to 150 meters. Photosynthetic organisms such as phytoplankton and about 90% of all marine life lives in this zone.
In the deep ocean the pressure is very high so, organisms have to survive under extreme pressure. In the deep ocean organisms are small and with low metabolic rate.
