What is the name for the cycles resulting from changes in earth's movements and that may cause ice ages?
a mammalian cycles
b glacier cycles
c milankovitch cycles
d quaternary cycles

Which of the following is a reason why early living organisms on earth could not have survived on the surface? 1. the lack of an ozone layer 2. the lack of oxygen in the atmosphere 3. the fact that these organisms were single-celled

What two factors does carrying capacity compare? population size and resource use population growth and resource availability resource use and time population size and time

Alizard lives in a desert. which would be an adapation for this lizard?