C. SHORT-ANSWER QUESTIONS: Answer in a sentent
1. Why do animals move around?
2. Give an example of movement in plants.
3. What are cells? Are all living things made up of cells?
4. There is some growth in unicellular organisms. How do they grow?
5. Give an example of a stimulus and a response.
6. How are autotrophs different from heterotrophs?
7. All living things take in oxygen. What function does oxygen perform in the body?
8. Name three waste products that we excrete.
Answers
Answer:
1. Animals move for a variety of reasons, such as to find food, a mate, a suitable microhabitat, or to escape predators.
2. Movements of the whole plant body or of an organ or of material within the plant cell which occur in responses to inherent factors and are free and spontaneous are said to be movements of locomotion.
3. all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
Answer:
1.Animals move for a variety of reasons, such as to find food, a mate, a suitable microhabitat, or to escape predators. For many animals, the ability to move is essential for survival and, as a result, natural selection has shaped the locomotion methods and mechanisms used by moving organisms.
2.There are movements shown by plants when the plant is touched. The common example is the plant Mimosa pudica closes the leaflets as a response to touch. The plant also shows movement when the cells of the pollen sac break and the pollen grains are released.
3.Cells are the basic building blocks of all living things. The human body is composed of trillions of cells.The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells. Rudolf Virchow later made important contributions to this theory
4.In biology, the respective means of growth within an organism varies from organism to organism. For instance, multicellular organisms grow via a process of cellular division known as mitosis, while others (being unicellular) grow or reproduce colonially-speaking via a process called binary fission.
5.Examples of stimuli and their responses: You are hungry so you eat some food. A rabbit gets scared so it runs away. You are cold so you put on a jacket.
6.Autotrophs store chemical energy in carbohydrate food molecules they build themselves. Most autotrophs make their "food" through photosynthesis using the energy of the sun. Heterotrophs cannot make their own food, so they must eat or absorb it.
7. cellular respiration
Your body cells use the oxygen you breathe to get energy from the food you eat. This process is called cellular respiration. During cellular respiration the cell uses oxygen to break down sugar.
8.These chemical reactions produce waste products such as carbon dioxide, water, salts, urea and uric acid. Accumulation of these wastes beyond a level inside the body is harmful to the body. The excretory organs remove these wastes.
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