If color blindness is an x-linked recessive trait, what genotype in a father and a mother would be predicted to produce a 1: 1 ratio of normal to color-blind offspring?

a.) unaffected father and unaffected (non-carrier) mother
b.) unaffected father and carrier mother
c.) affected father and carrier mother
d.) affected father and unaffected (non-carrier) mother

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

Most animal cell membranes have proteins that pump. ions out of the cell and potassium ions into this

What is the problem in this article? what solution does the article propose?