填空题

Parasites, which are smaller than their hosts, include ______.

【参考答案】

many viruses and bacteria
<上一题 目录 下一题>
热门 试题

填空题
When a shared resource is in short supply, organisms compete, and those that ______survive.
填空题
Birth rates decline, and mortality of young and adults increases when the population approaches______.
相关试题