Answer:
option B
Explanation:
The correct answer is option B.
The bond formed by donating electron is called Ionic bond.Ex LiF,NaCl
Bond formed by mutual sharing of electron between two atoms is know as Covalent bond. Ex CO, IBr
hydrogen bond is the bond formed between the hydrogen and highly electro negative compound. Ex: H₂O, NH₃
Polar bond is a covalent bond which is between two atoms where the electrons are unequally distributed.
Answer: n order for mitosis to work properly, it's important that the phases that come before it prepare for it as such. For example, in the G2 phase, the cell grows once more and double checks every organelle and genetic information so that it is ready to proceed into division phase.
D. M phase
Answer: D. A forest fire
Disturbance is an event of extreme environmental stress that
happens in a short period of time and can largely affect the ecosystem in the
area affected. Disturbances may either be due to natural phenomena or man-made.
Causes of a DNA mutations by environmental factors such as ultraviolet radiation from the sun or can occur if an error is made as DNA copies itself during cell division
