If a scientist is observing biotic and abiotic factors, which of the following level of organism must she be studying?
a. an ecosystem
b. a population
c. a community
d. an individual organism

The correct answer is option A. An ecosystem.

The ecosystem can be defined as the interaction of the organism to its surrounding, which include both biotic as well as abiotic factors.

In order to study the biotic and the abiotic factors, a person or a scientist must study ecosystem.

As any individual, population and community does not have abiotic factors.

answer; i believe the correct answer is (sporophyte);

after a the power stroke, adp is released, but the cross-bridge formed is still in place. atp then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site.