As hinted in the question, the cross bridge cycle is a
series of molecular events that occur after excitation of the sarcolemma. A
cross bridge is formed when a myosin head bound to actin. The cross bridge
cycle depends on the presence of calcium ions
A true-breeding plant is one that, when self-fertilized, only produces offspring with the same traits. True-breeding organisms are genetically identical and have identical alleles for specified traits. It is a kind of breeding wherein the parents would produce offspring that would carry the same phenotype. Basically true means identical or same. Hope this somewhat helped :)
Answer:
A. Uses the law of superposition to determine which rock is older or younger.
Explanation:
I majored in Biology
Hypothesis must be tested as the focus if any experiment
Answer: remove CO2 from the atmosphere during respiration
Explanation: I got the question right