Astudent viewing a cell with a microscope observes a cell wall, a cell membrane, and a nucleus. the presence of these structures indicates that the student is looking at a cell of what animal?

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

Which of the following is the best definition for the process of photosynthesis? a.) plants digest sugars to make energy. b.) plants use oxygen and glucose to make carbon dioxide. c.) plants use sunlight and carbon dioxide to make sugars. d.) plants use sunlight to make chlorophyll and chloroplasts.