You are told to identify the cells on a microscope slide as either plant, animal, or bacterial. You look at the cells to find th
at they have nuclei and organelles but no cell walls. You conclude correctly that the cells you are looking at are a. either plant or bacterial cells.
b. plant cells.
c. animal cells.
d. bacterial cells.
The answer is C. The widely used technique for finding extraterrestrial life is use of SETI (search for extraterrestrial intelligence) dishes that listen for radio waves from outer space. NASA has also been sending radio waves to outer space with messages that could purportedly be decoded by alien intelligent life.
