Final answer:
The statement that tree growth must be measured annually for accuracy is false; dendrochronology allows for analysis of tree rings at any time, which reflects past growth and environmental conditions.
Step-by-step explanation:
The assertion that growth in trees must be measured every year to be accurate is false; tree growth doesn't necessarily need to be measured annually to be accurate. Tree growth is recorded in the form of tree rings, with each ring typically representing one year of growth. This method, known as dendrochronology, can be used to study past climates based on the ring patterns. Scientists can analyze the tree rings at any time to study the tree's history of growth, which reflects environmental conditions such as temperature and precipitation.