What is the name for a fossil that is common to a particular period of geologic time and serves as an indicator for that time? a. coprolite b. microfossil c. index fossil d. stromatolite

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

In which way are mercury and venus similar? they both rotate from east to west. they are both small and rocky. they both have thick atmospheres. they both are similar to earth in structure.

What factors contribute to the effect an environmental toxin has on the human body?