Loss of brca activity contributes to cancer because
a. without brca, dna damage-sensing kinases cannot establish a cell cycle checkpoint
b. without brca, cells cannot perform homology directed repair of double-stranded breaks
c. without brca, dna polymerase can't use its proof-reading activity
d. without brca, cells can't remove oxidized bases

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.

b. climate change will cause an increase in biodiversity of all ecosystems.

hope this

answer; hydrologic cycle;

the dali lama

explanation:

he is quite fat and then we can talk about the details