Changes in one of the factors of the environment may cause decline and extinction. a. chemical b. physical c. both a and b d. none of the above

What is being converted during photosynthesis

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings

Select the word from the list that best fits the definition a system made of 25 satellites