Which of the following is NOT a necessary input for the process of photosynthesis? A. CO2 (carbon dioxide) B. Sunlight C. H2O (water) D. O2 (oxygen)

After Darwin proposed his ideas about natural selection, scientists began trying to test his ideas in a variety of ways. Which of the following best explains why it was important that scientists did this? A.

Refer to Animation: Proofreading in DNA Replication. What is the name for the enzyme activity that DNA polymerase has when it removes an improperly paired base from the end of the growing strand?

What does the blood transport to the body cells? A. nutrients & oxygen B. wastes & things the body can't use

A patient has a cytopathology study performed by a fine needle aspiration. the results are quite unusual and the slides as well as a copy of pertinent information from the patient's record are sent to another cytopathologist for consultation.

Which stage of a butterfly's life cycle occurs directly before a chrysalis forms? a. larva b. egg c. pupa d. adult

What types of cells perform cellular respiration?

1) What is ecological succession?

Which of the following is a density-independent limiting factor? A. earthquake B. emigration C. parasitism D. disease

Two equal body masses are accelerated, but body a's acceleration one-fourth of body b's. what is the force of body b on body a

What gives each amino acid its unique properties? A.) its side group B.) its amino group C.) its carboxyl group D.) its sequence