A food chain in an ecosystem flows from green algae, to freshwater snails, to small fish, and finally to large fish. Which organism is the primary consumer?

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?

Ineed with a hypothesis my question is can seeds sprout in different locations?

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?