13. which of the following is not required by animals to control body temperature? a. animals must switch between ectotherm and endotherm methods. b. animals must be able to get rid of excess heat when temperatures increase. c. animals must be able to conserve heat when temperatures drop. d. animals must find a source of heat.

What must be true for natural selection to heppen

Works together in the synthesis, modification, packaging, and transport of lipids and proteins

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition.b) one-fourth of the daughters of an affected man would have this condition.c) one-half of the daughters of an affected father and a carrier mother could have this condition.d) only if a woman is xxx could she have this condition.