What happens when the livestock grazing on rangelands remove ALL or
MOST of the grass cover?
A. it depends on the species of grass
B. nothing - the grass just grows back
C. soil erosion from wind and water occurs much quicker
D. the less rain can reach the soil

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

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.