Will give brainliest
what happens when a muscle contracts?

a. calcium combines with atp to produce sarcomeres.
b. calcium produces contractions.
c. actin produces myosin and atp.
d. myosin heads attach to and pull on a series of actin-binding sites.

__1__ is a climate cycle where the temperature of the __2__ ocean changes because of movements of air and ocean currents. during this period, the trade winds in the south __3__ , causing the __4__ water to move from the __5__ region to the __6__ region. 1) el nino or the monsoon 2) atlantic, indian, or pacific 3) reverse, strengthen, or weaken 4) cold or warm 5) eastern or western 6) eastern or western

What’s this animal (picture is tagged) and where is it most likely to live, rainforest or desert?

What is the primary goal of human communities?