Which statement accurately describes how identification of individuals through the use of genetic engineering is possible?
a. the y chromosome doesn't experience crossing-over.
b. the x chromosome can only be passed from a father to his son.
c. the mitochondria dna in a mother and her offspring vary greatly.
d. the dna in mitochondria is passed from mother to child in the nucleus

Which of the following is a consequence of urban heat islands? increased precipitation downwind of the city? increased precipitation upwind of the city? decreased winds within the city? increased winds within the city?

Choose one animal (cheetas) and research on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.

Why are common names a problem for scientist?