What is a protein that is the main component of the thick filaments in muscle fibers and is responsible for muscle contraction?

actin

myosin

actin and myosin

nerve and bone

Why is river water less clear at the mouth than at the source? a. because the mouth is warmer b. because the source is colder c. because the mouth has debris d. because the source is warmer

Which rock has very well defined layers? I am studying minerals and rocks.

How does the decaying of a fallen redwood tree contribute to the health of a forest?

The carbon footprint of an activity is used to assess environmental pollution. What does it measure? nitrogen oxide carbon molecules greenhouse gases

The urinary bladder is superior to the parietal peritoneum. a. True b. False

Forensic odontologists might be involved in which of the following circumstances? A femur bone is found in a field. A victim has a bite on his arm. A profile of a suspect is needed. Beetles are collected from a decomposed body.

Why does hurricane season occur from late spring through fall in the Atlantic region? A. Hurricanes need warm oceans waters to form B. hurricanes need the high air temperatures to form to form. C.

Earth's most recent era is the

During what process is water produced

Water, fuel, food, and raw materials are examples of what? A. regulating services B. cycling of matter and energy C. natural resources. D. cultural services