The is the bacterial structure that acts as a selective barrier, allowing nutrients to enter the cell and wastes to leave the cell. 1. plasma membrane 2. nucleoid region 3. ribosome 4. pili 5. cell wall

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

The pronunciation aid that determines the stress placed upon a syllable is the

Which example describes a mutualistic relationship between organisms? young wasps prey on caterpillars. crabs eat the remains of dead fish. tapeworms feed on food in the intestines of cats ants protect a tree on which they feed.