Which step of cross-bridge cycling is considered the power stroke?
a. when the myosin cross-bridge forms
b. when atp binds to the myosin head and releases it from the thin filament
c. when the phosphate is released and the myosin cross-bridge moves to the right in the animation
d. when atp is hydrolyzed and the myosin head moves to the left in the animation

Svetlana and her mother are very similar. both have blonde hair, a love of scrapbooking, blue eyes, and a thin nose. which statement  most likely  describes svetlana’s traits? svetlana inherited her love of scrapbooking from her mother, but her blue eyes come from her environment. svetlana inherited her blue eyes from her mother, but her love of scrapbooking comes from her environment. svetlana inherited her thin nose from her mother, but her blonde hair comes from her environment. svetlana inherited her blonde hair from her mother, but her thin nose comes from her environment.

Match the pollutants. 1. a chlorofluorocarbon smoke 2. a biodegradable organophosphate insecticide freon 3. particle pollution paint 4. hazardous waste monoxide 5. carbon is completely burned malathion 6. carbon is incompletely burned dioxide

Ascientific idea becomes valid when it is what?