Answer:
See the answer below
Explanation:
a) The mode of inheritance of the bar mutant is X-linked and dominant.
Assuming that barness is represented by the allele B.
Bar female =
or 
Wild type male = 
Bar female x wild type male:
x 
All of the F1 flies are bar because a single B allele is required for the trait to be expressed.
Bar male x wildtype female
x 

All the female offspring are barred while all the males are wildtype barred resulting in a 50/50 (857/905 is approximately 50/50) ratio of barred/wildtype offspring.
b) Genotypes of each of the cross above, including the parents and the F1 generations.
1.
x 
2.
x 

Answer:
d
Explanation:
assuming you mean moves not movies, the rainforest has the most moisture so itll have the most precipitation
DNA is what codes for everything in your body and DNA helps make proteins mRNA tRNA and rRNA
Answer:
B competition will increase
Explanation:
this is because if there are less acorns then squirrels then they will all fight for the acorns and some will die to starvation. nest size won't increase because there isn't enough food for the squirrels already there. predation will decrease because there is less squirrels so that means less pray for the animals that eat the squirrels. then there is reproduction rates will increase. It is not that one because there are squirrels dying from starvation there aren't squirrels reproducing. that is why your answer is B.
This pulse travels rapidly along the cell's axon, and is transferred across a specialized connection known as a synapse to a neighbouring neuron, which receives it through its feathery dendrites. So I would say axon