For a type of cat, short whiskers are dominant (S) and long whiskers are recessive (s). The Punnett square below shows a cross between two cats.
What is the phenotype ratio for this cross?
sls

S
Ss
SS
A. O short, 4 long
B. 3 short, 1 long
C. 2 short, 2 long
D. 4 short, 0 long

Mutations associated with albinism affect proteins involved in synthesis

In 2015, about ten percent of total u.s. energy consumption was from renewable energy sources. renewable energy plays an important role in reducing greenhouse gas emissions. when renewable energy sources are used, the demand for fossil fuels is reduced. sanjay and his family want to cut back on their use of non-renewable resources at home. they are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment. which renewable resource would not fit into their plan? a) solar power b) burning wood c) constructing a wind turbine eliminate d) generating hydroelectric power

Ascientific idea becomes valid when it is what?