In mice the recessive form of a gene causes the death of the fetus if present in the homozygous state. Mice heterozygous for this gene were crossbred. What percentage of…

In the formula P=2r2tr = 3 x 10-3 t = 2.5 x 10 4Calculate the value of P. Leave your answer in standard form. Answer: 4) D P = 2r²t…

A radioactive isotope X decays into the stable isotope Y with a half-life of 20 s. Which graph correctly shows how the mass (m) of Y present in an initially…

Element Y forms an ion Y 3- with the electronic configuration 2, 8, 8.To which group and period of the periodic table does Y belong? Answer: 2) C The (-3)…

Which one of the following involves active transport? A movement of carbon dioxide into alveoli in the lungsB uptake of alcohol (ethanol) through the lining of the stomachC secretion of…