50 points! Plz help Why can eukaryotes be considered "combination" organisms?

Some of their genes and cellular characteristics were derived from archaea, and others from bacteria.
They eventually developed flagella.
They eventually developed cellulose plates.
Their diversity outnumbers prokaryotes by over one million species.

Aheterozygous normal male marries a woman with a sickle cell anemia. give the genotypes and possible phenotypes of the offspring

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody