Seeding a new tank is done by... a
adding bacteria from an established tank's filter
b
adding commercial bacteria
c
neither of the choices
d
both of the choices

Which element is used in photosynthesis found in atmosphere and fixed by bacteria?

Imagine that a mouse has white fur because of a mutation in its dna. which of the following conclusions can be drawn

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.