Which of the following statements about the nucleus is true? a. the nucleus stores the coded instructions for making the cell’s proteins. b. the nucleus usually contains a nucleolus region which is where mitochondria assembly begins. c. the nucleus is the site of protein assembly. d. the nucleus is surrounded by cell membrane that lets materials in and out.

The number of living organisms in a particular area is

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

Ineed to get this test done which of the following statements is correct in hour our immune system responds to a potential pathogen? a.) the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. b.) b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c.) the adapted immune system will call on the innate immune system to destroy the pathogen. d.) the t-cells in the adapted immune systems are the first to recognize the pathogen