If R = red and r - white, what would be the result of a cross between a
heterozygous female (red-eyed with one
recessive allele) and a recessive male?
Hint: Draw a Punnet square,
A. 25% red-eyed female, 25% white-eyed female, 25% red-
eyed male, 25% white-eyed male
B. 25% white eyed male, 25% red-eyed male, 50% and red-
eyed female offspring
C. 0% chance of white-eyed flies

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

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

This is a situation in which genes are attached to an organism's sex chromosomes; the sex of an organism influences the expression of a gene.