Which of the following items was Darwin able to use to study the structures of extinct organisms?
A. Fossils
O B. Species
O C. Amino acids
O D. Adaptations

Plz will mark! the diagram shows the positions of the sun, moon and earth during spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

What molecule does hemoglobin decay into over time