thorns
Plant Thorns Increase When Defense Needed
In areas with few herbivores acacia plants don't bother to churn out many of the off-putting thorns. Cynthia Graber reports Learn more about your ad choices. Vi…
In areas with few herbivores acacia plants don't bother to churn out many of the off-putting thorns. Cynthia Graber reports Learn more about your ad choices. Vi…