Answer:
True. I'm pretty sure that there was <em>only</em> single celled organisms too
Answer:
more molecules reaching the activation energy, which increases the rate of the reactions. Since the molecules are also moving faster, collisions between enzymes and substrates also increase.
Explanation:
Answer: Option 2) .the information on the strand changes
Explanation:
The rearrangement of nucleiotides in a DNA strand could be reversing the position of a chromosomal segment (Chromosomal inversions) OR interchanging the genetic parts of chromosomes (Chromosomal translocation)
In either case mutations occur because the information on the strand changes.
Answer:
The main reason is growth factor ligands do not bind as efficiently to receptors.
Initially, normal cells work efficiently on binding of enzymes, growth factors or ligands and cellular growth cycle runs effectively but with the passage of time, cellular aging or organismal aging can lead to decrease efficiency of cellular recepotors binding with the growth factor ligands gradually.
