3. In Dewey Elementary School, there are two
second-grade classes: class A has 35 students
and class B has 45 students. If 40% of the
students in class A walk to school, and 80%
of the students in class B walk to school, what
percent of all the students in the second grade
at Dewey Elementary walk to school?
A) 40%
B) 42.5%
C) 60%
D) 62.5%

Its unlawful in the state of florida for any person to operate a motor vehicle unless each passenger of the vehicle under age of

Panthers and leopards prey on deer in an ecosystem. for unknown reasons, the population of leopards increased drastically. what are the likely effects of this change on the species? 1. more food for panthers and more competition for leopards 2. less food and more competition for panthers 3. fewer deer and more competition for panthers 4. more food for deer and less competition for panthers and leopards 5. more food for leopards and less competition for panthers

Apopulation of deer mice was introduced into a desert ecosystem. being dark-colored, the deer mice stood out in the sand and were easy prey for predators. over a few years, the color of the mice changed from dark brown to light brown. what role does natural selection play in this example? a. the change of color camouflaged them, which them hunt better. b. the change of color enabled them to regulate their body temperature. c. the change of color allowed them to hide better from predators. d. the change of color made their bodies tolerant to the harsh desert sand. e. the change of color allowed them to deflect the excessive heat.