One of the primary advantages of cell culture is the ability to isolate a single type of cell from a multicellular organism. how has this advance changed the study of biology?
single-type cultures are easier and cheaper to maintain than cultures made of mixed cell types.
scientists can completely avoid using animal or human test subjects during their experiments.
cultures with single cell types behave in culture exactly as they would behave in a tissue or organ.
scientists know that any response during an experiment is associated only with that cell type. answer is d

qeustion 2 a lion eating a zebra is an example of which characteristic of life?
having cells
responding to the environment
using energy answr is c
growing and developing

which is the most likely reason that stem cell research is controversial?
stem cell research could lead to the development of human clones.
many people assume that all human stem cells come from embryos. answer is b
research by using stem cells results in high-priced treatments for disease.
information that is obtained from stem cell research is considered unreliable.

which diagram shows a homologous chromosome pair that has homozygous alleles? ok so it is the 4th picture of the 2 chromosomes be careful onthis one