Ozone located in the troposphere is . A. considered a pollutant
B. beneficial to living organisms
C. higher in concentration than ozone in the stratosphere
D. all of the above

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction