D. Answer the following questions. 1. Why do living things need food? 2. How do plants breathe? 3. What is reproduction? How do fish reproduce? 4. Name the plant that closes its leaves when touched 5. Do frogs need air to live? How do they take in air?
Answers
Answer:
1. All living things need food to stay alive, grow, and get energy
2. As with photosynthesis, plants get oxygen from the air through the stomata. Respiration takes place in the mitochondria of the cell in the presence of oxygen, which is called "aerobic respiration".
3. In most cases, the female drops eggs in the water which are immediately fertilized by sperm from the male. Another way is for fertilization to occur within the females body before she drops them into the water. With the third and final method, the female retains the eggs within her body and the young are born alive.
4. Mimosa pudica
5. Frogs rely on their lungs to breathe when they are active and need more oxygen than skin respiration alone can provide. Unlike mammals that draw air continuously into their lungs, frogs only breathe through lungs when necessary.