1.   They inserted an extra gene and ended up with a virus that wiped out all the test animals within nine days.

2.   Animals have been deliberately infected with the disease and then various tissues from their bodies used to try to infect test animals.

3.   Harassing Spina at home, Hampton says, pales beside the anguish of test animals.

4.   The findings may be conservative, because the test animals were examined when female reproductive structures had not yet enlarged.

5.   The same study run today without clones requires hundreds of test animals to average out the effects of individual differences.

6.   The search starts with a hungry dolphin and winds up with a lovable pup that becomes a test animal.

7.   Then they found it had a strong sedative effect in humans, though not in test animals.

8.   Tonka beans contain coumarin, a substance known to cause liver and other organ damage in test animals.

9.   Pattamarat said that standardized breeding and laboratory facilities are needed to produce qualified test animals.

10.   Biologists often cut open test animals to study what happens when they are injected with drugs or diseases, he said.