What part of the plasma membrane makes it difficult for water-soluble substances to move freely into and outof the cell?

Which organism is the producer in this food web? 7th grade question. a) arthropods b) birds c) fungi d) plants

How do chloroplasts set plants apart from other living things

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.