Which of the following poses the greatest risk for species extinction?
a.
expansion of human cities
b.
increased levels of pollution
c.
intense hurricane activity
d.
uv radiation and the hole in the ozone layer

Astudent reads the following text in a science book: scientific evidence tells us that the cause of earths four seasons is the tilt of earth as it revolves around the sound the student is instructed to illustrate this information in a science book. how will the student illustrate winter in the northern hemisphere? a.earths northern hemisphere will tilt away from the sun. b. earths northern hemisphere will tilt toward the sun. c.earths orbit will be farther away than from the sun d. earths southern hemisphere will tilt away from the sun.

Which of the following is an effect of the uneven heating of the earth by the sun? a sea breeze a land breeze a convection current all of the above

Individuals do not compete directly for resources, but are prey for the same predator