Gnotobiotic animals play a minor role and are at present often used for animal experiments.

A. 对
B. 错

By the laws, each institution in the US must have an Institutional Animal Care and Use Committee (IACUC) to oversee and evaluate the institution's animal program to assure compliance with all the regulations.

A. 对
B. 错

The Animal Welfare Act 2006 in the UK contains the general laws relating to animal welfare. It is not an offence to cause unnecessary suffering to any animal.

A. 对
B. 错

The Universal Declaration on Animal Welfare is a proposed inter-governmental agreement to recognize that animals are sentient, to prevent cruelty and reduce suffering, and to promote standards on the welfare of animals such as farm animals, companion animals, animals in scientific research, draught animals, wildlife and animals in recreation.

A. 对
B. 错

Working with animals, scientists have proposed that the assessment of animal welfare should include a mixture of different philosophical theories such as hedonism, perfectionism and preference theories.

A. 对
B. 错

The animals selected for a procedure should be of an appropriate species and quality and the maximum number required to obtain valid results. Methods such as mathematical models, computer simulation, and in vitro biological systems should be considered.

A. 对
B. 错

Animals must be provided water, food, proper handling, health care, and an environment appropriate to their care and use, with thoughtful consideration for their species-typical biology and behavior.

A. 对
B. 错

Animals shall be treated with respect and dignity throughout their lives and, when necessary, provided a slow death.

A. 对
B. 错

Refinement and reduction (2Rs) in animal research are independent of each other; hence understanding of their interplay and relationship is not crucial.

A. 对
B. 错

In 2016,820,812 animals were used for research purpose in the US. The numbers of common animal spieces for research are: