Answer:
c. Hydrogen
Explanation:
Do I really need to explain...
Answer:
Intraspecific Competition
Answer:
Telescopes, spectroscopes, space probes.
Explanation:
Answer:
A biologist discovered a young, four-legged animal. The animal had lungs, seemed to fertilize internally, and its outer surface was covered with scales. In which class of animals is the biologist likely to place the animal?
reptile
Answer:
oxygen
Explanation:
The answer is tiny organisms known as cyanobacteria, or blue-green algae. These microbes conduct photosynthesis: using sunshine, water and carbon dioxide to produce carbohydrates and, yes, oxygen
