An organism that regulates its temperature internally.
an organism that uses external sources of heat to regulate its temperature.
an organism whose internal temperature may vary considerably.
an organism that maintains a constant internal temperature.
a. endotherm
b. homeotherm
c. ectotherm
d. poikilotherm

Explain why biological control methods are generally environmentally superior to chemical pest control methods.

Ascientist is investigating the effects of salinity on fish development. he places fertilized fish eggs in an aquarium that contains low salinity and observes their development. what factor would improve experimental design the most? place the fish eggs in the open ocean because that is the natural habitat include another aquarium that has normal salinity to compare to the low salinity aquarium include an aquarium that replaces salt with sugar to confirm that the effects are specific to salt grow algae with the fish eggs in order to provide adequate nutrients to the developing embryos

If there is another new infectious disease somewhere in the world, what do you think canadian officials should do