Which of the following is an example of a role programmed cell death plays in development in organisms?
it is critical for the growth of differentiated tissues in animals.
it is crucial to the development of xylem and phloem in plants.
it is necessary for the differentiation of organelles in eukaryotes.
it is required before exchange of dna can occur in bacteria.

Been sitting here trying to take this test and don't know this answer! place the events of a feedback mechanism associated with body temperature in the correct order. ·nerve cells send message from skin to the brain ·body returned to normal temperature around 98.6 degrees f ·temperatures regulation center in the brain sends out signals ·body temperature exceeds 98.6 degrees f ·sweat glands throughout the body activate to cool off skin surface it is a 1 through 5 question in biology!