are unicellular organisms with no nucleus that can cause diseases and pain with toxins. word bank: protists, antibiotics, infectious, bacteria, pathogen, viruses, fungi, vector, vaccine.

Why does meiosis produce cells with half the chromosomes? o a. most of the chromosomes are not necessary to keep an organism alive. b. a gamete needs only half the number of chromosomes because two gametes join together. o c. it makes the gametes easier to move around in the organism. o d. it is faster to produce gametes with fewer chromosomes.

Which substance contains thylakoids? a) nadph b)atp c)stroma d)chloroplast

During convection, less dense fluid rises and denser fluid sinks.