Compare How is the life cycle of a mammal different from the life
cycle of an animal that undergoes
metamorphosis?

Differences between mammals and animals are:

• Animals could be either ectothermic or endothermic, but mammals are always endothermic.

• Only mammals have hairs on the skin out of all the animals.

• Only mammals have mammary glands and sweat glands out of all the animals.

• The most sophisticated heart and the circulatory system are present in mammals out of all the animals.

• Mammals have more complex living habits (e.g. human) than other animals.

• Number of mammals is only a fraction compared to the rest of the number of animals.

• Some mammals are capable of singing, but other animals are not.

1."lessen the worth of ."

2."increase the worth of."

3." beyond the worth of."

4."against the worth of ."

a. european colonies