Suppose you found a fossil of a clamshell what can you conclude aboth the once-living organism and how it became a fossil ?

Which best describes how the common cold spreads in the human body? a bacteria burst out of normal cells killing them b viruses replicate inside respiratory cells c bacteria inject dna into normal cells d viruses insert dna into bacteria

Consider the skeleton. which skeletal system is represented by the shaded portion of the skeleton? spongy skeleton compact skeleton axial skeleton appendicular skeleton

Which environmental change would most likely result in bullfrog offspring that are able to store more water than bullfrogs in previous generations?