Which of the following explains why fossils of some extinct organisms have been found while others have not? A.
Fossils only exist for organisms that lived over 3 million years ago.

B.
Fossils only exist for organisms that had shells or hard outer body coverings.

C.
Most organisms die and decompose without leaving any fossil remains.

D. Only very large organisms have enough body mass to result in fossil formation.

Nucleic acid certain protein cell membranes certain carbohydrates

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases

Read the article and use the information to answer the questions that follow discovering the structure of dna explain how the discoveries by rosalind franklin watson and crick build an accurate model of dna done