Mercury is a pollutant classified
a. a radioactive waste
b. a heavy metal
c. an organic material
d. a pathogen

Before the can be observed by using a transmission electron microscope, cells are sliced into very thin sections. what disadvantage does this procedure present in the study of cellular parts

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.

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome