1-15 Direction: Read the statement carefully. Choose the letter of the best answer. Write your answer in the space provided. 2. 1. What is the basic unit of structure and function of all living things capable of performing life processes A. Tissues B. cell C. organ D. organism An organ system of plants that absorbs water and nutrients from the soil. A Circulatory system C. root system B. shoot system D. digestive system 3. This level of organization composed of similar cells that are arranged and grouped to perform specific functions. A Tissues B. cell C. organ D. organ system A population of Aphids thriving on the stem and leaves of a group of green shrubs with some group of ants form a A. Organ system B. ecosystem C. community D. biosphere 5. The recent laboratory result of Mrs. Reynoso revealed that her white blood cells and pus cells are too many to count which shows she has a Urinary Tract Infection. Which organ system has a problem in this situation? A. Circulatory System C. Respiratory System B. Reproductive system D. Excretory System 6. The heart pumps and circulates blood to the different parts of the body through the blood vessels. What might happen to the person if it fails to function? A. The heart will be damaged C. The cells of the heart will be affected B. There is no significant effect to the person D. The person will suffer and might die 7.__A group of organisms of the same species that live in a particular geographic area at the same time, with the capability of interbreeding. A. Community B. Biosphere C. Organism D. Population 8. It is the layer of the planet Earth where life exists. A. Thermospher B. Mesosphere C. Exosphere D. Biosphere 9 Which of the following statement is true? A. A group of organisms of the same kind living in a particular area forms a Population B. Biosphere is the non-living part of the earth C. A group of different population in a particular area forms an Ecosystem D A living individual composed of different organ systems forms a community 10. Cancer cells are abnormal growth of cells that invade and outlive normal cells. What is the effect of diseased cells on the higher levels of organization in an organism? A. Diseased cells affect certain kinds of organ. B. Diseased cells affect the next level of organization which are the tissues C. Cancer cells can affect all the levels of organization in an organism: the tissues, organs, organ systems and eventually the whole organism D. Diseased cells do not affect the other parts of the organism​