The fossil record contains fossils from many geologic ages. Fossils enable scientists to plece together what ancient organisms looked like. Which of these answers best describes how fossils in the food classified?

O by ages and physical similarities
O by whether the fossil contains hard or soft tissues
O by size and the type of rock in which they are found
by similarities in their DNA and in the minerals they contain

List two limitations of natural selection

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

What type of pollution does household garbage cause