oceans, mountains, lakes, rivers, plateaus, plains, streams, hills, bays, gulfs, volcanoes, canyons, valleys and peninsulas are all various physical features.
B. alternating phosphate groups and pentose residues
Mucus traps foreign particles and germs, protecting the body (especially the trachea)
Answer:
The answer is A
Explanation:
It is limited by environmental factors. A population of organisms cannot survive if it exceeds its carrying capacity. There are also limiting factors, such as predators, disease, etc.