Looking at fossils in rock layers only could tell us which of the following (select all that apply)
The type of weather in a time period

The diet of the organism

If 2 continents might have been connected

The exact population count of a species

Current relatives organisms evolved to become

If the organism traveled in herds or was solo

The average temperature during the time period

The exact age of the fossil

i do not know and i have a 100 in this class

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

you know they are heterozygous for a trait because they have it as jj or jj.