Its A because there has to be a roman numeral to indicate which net charge of iron was used
Answer:
Here's what I get
Explanation:
The etching gel used in many dental procedures contains
- 10 % to 50 % phosphoric acid in water
- a thickening agent consisting of hydrocarbon polymers and a colloidal silica sol
- a colouring agent such as cobalt aluminate blue spinel (CoAl₂O₄) to make it visible on a tooth.
Decomp. ~ 2H2O —-> 2H2 + O2
Single Disp. ~ AgNO3 + Cu —> CuNO3 + Ag
Double Disp ~ Pb(NO3)2(aq) + 2KI(aq) -> 2KNO3(aq) + PbI2(s)
Combustion ~ CH4 + O2 —> CO2 + 2H2O
Synthesis ~ 2Mg + O2 —> 2MgO
It is equal to amount of thymine
Answer:
Pre-zygotic, temporal separation
Explanation:
Reproductive isolation mechanism is of two types:
- Prezygotic mechanism
- Postzygotic mechanism
Prezygotic mechanism isolation occurs before fertilization and helpful in preventing formation of fertile offspring.
In frog external fertilization occurs. In the external fertilization, eggs and sperms are released in water and fertilization occur outside the water.
Prezygotic isolating mechanisms may include behavioral isolation, temporal isolation, mechanical isolation, gametic isolation and habitat isolation.
Temporal separation in reproduction is the sexual activity in the same geographical range but in different periods.
Therefore, the given reproductive isolation is pre-zygotic, temporal separation.