A muscle contracts more strongly when lifting a 20-pound weight than when lifting a 5-pound weight. This is because more fibers are contracting, not because individual fibers contract harder.

a. true

b. false

a. true

Which defines energy? Question 43 options: ability to do work creation of heat increase of disorder power to change

How might the fish in a lake be affected if large amounts of hot water from a power plant or factor were released into the lake?

How is the skin the body's first line of defense? a. It secretes oil, which washes away pathogens. b. It secretes sweat, which raises the pH of the skin and kills pathogens. c. It forms a physical barrier to keep pathogens out. d.

Which of the following is an adaptation that would make the most sense in a fully-submerged water plant? The ability to expel carbon dioxide from its roots. The ability to store water in its stem. The ability to live in low light conditions.

What causes a mudflow?

What is an example of recombinant dna technology?

How many chromosomes do humans with down syndrome have?

Which trophic level has the least amount of energy available for the next highest trophic level? a. secondary consumerb. omnivorec. decomposerd. producer

What is an acquired trait?

What does all of the organ system in a human form