What is the main component of the thin filaments in muscle fibers and is responsible for muscle contraction?

a) actin

b) myosin

c) actin and myosin

d) nerve and bone

Each enzyme only has 1 substrate that will fit its active site what is it called

If an organism has 40 chromosomes in its gametes, how many chromosomes are in it somatic cells

How large may an air mass be?

When a bee drinks nectar from a flower, it gets pollen on its hind legs (pollen baskets), When the bee visits another flower, it transfers the pollen from the first flower to the second flower.

In general, what is not affected by the ingestion of caffeine? a. behavioral consequences of alcohol intoxication b. the risk of cardiovascular disease c. the time it takes to fall asleep d. performance of boring or repetitive tasks

What component of Earth's atmosphere exists entirely as a result of photosynthesis?

1: In general, surface water always flows A. downhill. B. from north to south. C. toward the equator. D. from south to north.

A lens located directly above the stage. Many microscopes have more than one objective to provide a range of viewing magnifications. Cognitive lens Orbital lens Complex lens Objective lens

What would happen to animal cells if they had cell walls like plant cells?

Do you feel that atrificial human cloning is morally acceptable to a Christian?