Blank is an appropriate method to monitor a population of swallows, while blank is an appropriate method to monitor a population of tortoises

Point count is an appropriate method to monitor a population of swallows while line-transect  distance sampling is an appropriate method to monitor a population of tortoises.

Explanation:

Point counts are widely used to count or keep track of birds. An observer can record the birds from a single point for a certain standardized amount of time

While line-transect distance sampling will help in the monitoring of tortoise population. It can show how some individuals are missed and also at the same time establish a method for controlling those number of individuals missed.

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands