An internal wooden frame is to a house as to a body
a) a muscular system is c ) a skeleton is

b ) blood vessels are d ) an organ is

Some birds look for food near cattle and other livestock. the movement of the cattle churns up the ground, making insects available to the birds. the cattle appear to be unaffected by the presence of the birds. what kind of relationship exists between the birds and the cattle? o a. parasitism o b. commensalism o c. predation o d. mutualism

Study the diagram of a cell. which structure is found only in plant cells and functions in the process of photosynthesis? w x y z

Consider the classification levels of a human. eukarya ,animalia ,chordata ,mammalia ,primates, hominidae ,homo ,sapiens .which is the most specific taxonomic level in the classification system above? a sapiens b homo c hominidae d primates