When a caterpillar emerges from the egg on a tree branch, it immediately climbs upward until it finds a leaf bud to eat. Biologists thought that this behavior displayed an innate tendency to move in the direction opposite to the pull of gravity. In a recent experiment, a strong light source was placed at the bottom of a tree, and caterpillars, after hatching, climbed downward.
Which of the following hypotheses is best supported by the statements given?
谢谢楼上的。第二题中的(C) Newly hatched caterpillars move towards the strongest light source in the environment还是觉得很奇怪,即使说是Move towards the light source,怎么会得出来是strongest light source呢,还是想不通
In a recent experiment, a strong light source was placed at the bottom of a tree, and caterpillars, after hatching, climbed downward. 題目已經跟你講了,底部光源會導致毛毛蟲往下爬而非往上爬,光源是造成毛蟲爬行的主要原因,答案C告訴你剛孵化的毛蟲會往光源方向爬去,與題目支持的理由相同,所以答案是C