Question 1
The developing organism is called an embryo
◦ from the moment of conception.
◦ when cell division begins.
◦ when bodily systems begin to work.
◦ once implantation is complete.
Question 2
The general principle that the impact of a teratogen depends upon the genotype of the organism is best illustrated by
◦ rubella being more likely to cause birth defects during some times of pregnancy than during others.
◦ thalidomide during pregnancy causing deformed limbs, but not low birth weight, while the use of marijuana during pregnancy is associated with low birth weight but not deformed limbs.
◦ the effects of eating PCB-contaminated fish while pregnant not being obvious when a child is born, but appearing later in the child's life.
◦ two women who both took thalidomide during pregnancy with one of them giving birth to a child with deformed limbs and the other giving birth to a child with normal limbs.
The Impact of Reduction Campaigns on Sids Rates
General Motors, Cadillac Fleetwood.
Biological control pits one organism against another
The impact of climate change on natural ecosystems
The General Process of Sensation
General mechanism of sperm formation in animals