Chapter Preview Questions 1. All living things are made of a. tissues. b. muscles. c. cells. d. chemicals.

Chapter Preview Questions 1. All living things are made of a. tissues. b. muscles. c. cells. d. chemicals.

Chapter Preview Questions 2. Scientists observe the details of cells a. with their bare eyes. b. through microscopes. c. through telescopes. d. in petri dishes.

Chapter Preview Questions 2. Scientists observe the details of cells a. with their bare eyes. b. through microscopes. c. through telescopes. d. in petri dishes.

Chapter Preview Questions 3. Unlike animal cells, many plant cells contain a. chloroplasts. b. mitochondria. c. cytoplasm. d. DNA.

Chapter Preview Questions 3. Unlike animal cells, many plant cells contain a. chloroplasts. b. mitochondria. c. cytoplasm. d. DNA.

Chapter Preview Questions 4. Genetic information in plant and animal cells is in the cell’s a. chloroplasts. b. membrane. c. nucleus. d. walls.

Chapter Preview Questions 4. Genetic information in plant and animal cells is in the cell’s a. chloroplasts. b. membrane. c. nucleus. d. walls.

How do cells obtain the energy they need to carry out all their functions? Hummingbirds feed on the nectar produced by flowers. Nectar is a sweet liquid composed largely of carbohydrates. What does nectar provide for the cells of the hummingbird?

Greek Word Origins auto- Prefix Meaning Example Word autotroph An organism that makes food for itself auto- self

Greek Word Origins hetero- Prefix Meaning Example Word heterotroph An organism that depends on other organisms for food hetero- other, different

Apply It! The Greek word trophe means “food.” What two key terms in the table come from this Greek word? How does the meaning of each of these words put two Greek words together?

Section 1: Photosynthesis How does the sun supply living things with the energy they need? What happens during the process of photosynthesis?

Sources of Energy Nearly all living things obtain energy either directly or indirectly from the energy of sunlight captured during photosynthesis.

The Two Stages of Photosynthesis During photosynthesis, plants and some other organisms use energy from the sun to convert carbon dioxide and water into oxygen and sugars. Stage 1: Capturing the energy in sunlight Stage 2: Converting the energy into food