R= no red hair
r= red hair
if the child has red hair, both of the parents would have to have hetrozygous alleles. (Rr) And when the child would have had to pick up both of the recessive traits with red hair. (r)
The enzyme pectinase speeds up the breakdown of pectin in fruits, producing more juice. It speeds up breakdown of pectin in plant cell walls, thus creating more juice. It is also used in wine making to avoid cloudiness
The fourth one that looks like an M. This is because it describes changes in population genetics in which extreme values for a trait are favored over intermediate values. In this case, the variance of the trait increases and the population is divided into two distinct groups.
True.
Abiotic factors are factors that are not living but can affect the living organisms (biotic).
For example, soil, temperature, water, etc. are all different kinds of abiotic factors.
hope this helps