Cause mammals are the only species that are well developed before birth unlike marsupial and monotremes
Systematics is the study of the units of biodiversity. Systematics differs from ecology in that the latter is concerned with the interactions of individuals (and therefore species) in a particular time.
Answer:
Soil is composed of small pieces of a variety of materials, so it is a heterogeneous mixture.
Explanation:
Food - increase in height
Predators - fast reproduction, fast in general
Heat/lack of water - Cam photosynthesis, storage of water
Predator/prey arms war - sensors along side to detect prey, sense of smell, etc