Answer:
The correct answer would be "Myosin heads attach to sites on actin filaments".
The muscle cell or myofibril consists of two types of protein filaments namely; actin (thin filament) and myosin (thick filament).
The myosin heads attach to the binding sites on the actin filaments and pull it towards the M-line in order to produce contraction.
The hydrolysis of ATP provides energy for this contraction cycle.
Answer:
compound
Explanation:
Sheets can be grouped into two basic groups: single sheets and composite sheets. The simple leaves are those in which the limb is not divided. The composite leaves, in turn, have the limbus divided into small portions called leaflets. Each leaflet may also have a small petiole, which in this case is called a petiole.
Composite leaves can be further classified into two types: pinnacles and spankings. Pinnacles are those in which leaflets start from the rake (petiole extension) as a feather. The spanking, in turn, has its leaflets starting at the very end of the petiole.
Answer:
In plants, light dependent reactions take place in the thylakoid membranes of the chloroplasts.
Hey there
the answer is
A.the ability of your heart and lungs to work during prolonged exercise
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