1 Multicellular organisms are organized into several biological levels.Which of the following can apply to each level of biological organization? A Presence of tissues B Interaction of organs C Increased number of parts D Specific structure and function

## Step 1<br />The problem is asking us to identify which of the given options applies to each level of biological organization in multicellular organisms. The levels of biological organization include cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.<br /><br />## Step 2<br />Let's analyze each option:<br /><br />### A. Presence of tissues<br />Tissues are indeed a level of biological organization, but they are not present at every level. For example, at the cellular level, there are no tissues.<br /><br />### B. Interaction of organs<br />The interaction of organs is a characteristic of the organ system level, not every level.<br /><br />### C. Increased number of parts<br />The number of parts does not necessarily increase with each level of organization. For example, an organ system has fewer parts than an organism.<br /><br />### D. Specific structure and function<br />This option applies to each level of biological organization. Each level has a specific structure and function. For example, cells have a specific structure and function, tissues have a specific structure and function, organs have a specific structure and function, and so on.