Which of the following is an example of positive feedback?
-abscisic acid (aba) in plants slows bud growth in cold temperatures.
-an increase in ethylene gas causes fruits to ripen more quickly.
-taking a tranquilizer slows the speed of signal transmission in neurons.
-panting in dogs increases the amount of cool air in nasal passages and lowers body temperature

Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria

Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah 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.

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.