Match the following.
- in vitro fertilization
- transplant
- organ
- biotechnology
- test tube baby
- tissue
- cells
- organ rejection
1. the use of living organisms to benefit the environment or
human health
2. the basic unit of all living things
the process of manually combining an egg and sperm in the
laboratory and implanting an embryo into a uterus
4. a group of tissues joined to perform a specific function
the process where a patient's body rejects the transplanted
5. organ and the individual's immune system begins to attack
the transplanted organ
6. an embryo that is created by in vitro fertilization
7. a group of cells that perform a similar
8. replacing a failing organ with a donor organ that is healthy

In 2009, a flu pandemic was believed to have originated when viral transmission occurred from pig to human, thereby earning the designation, "swine flu." although pigs are thought to have been the breeding ground for the 2009 virus, sequences from bird, pig, and human viruses were all found within this newly identified virus. what is the most likely explanation of why this virus contained sequences from bird, pig, and human viruses? a) the virus was descended from a common ancestor of bird, pig, and human flu viruses.b) the infected individuals happened to be infected with all three virus types.c) related viruses can undergo genetic recombination if the rna genomes mix and match during viral assembly.d) the human was likely infected with various bacterial strains that contained all three rna viruses.