SCIENCE Directions: Write T if the statement is TRUE and F if the statement is FALSE.

1. A wheel and axle is a kind of simple machine.
2. A ramp is an example of wheel and axle.
3. Using wheel and axle reduces the friction between the object and the surface.
4. The type of material used as wheel and axle will not affect its performance.
5. A force is applied to spin the axle then transferred to the wheel thereby creating a
circular motion which enables it to move.

Invasive species are one of the major threats to biodiversity. these species multiply quickly and compete with native species for food, sunlight, spac and other resources. on the map, determine the area where native species will have limited resources available to them due to invasion threat from invasive species threat very low low medium high very high

As a small change in a person's dna can cause a genetic disorder

Cold case files recently began re-investigating an old murder case. the murder took place in the park; a young man, james, was hit over the head with a brick and killed. police suspected the jealous former boyfriend of james' wife, karen. whoever killed james may have washed their hands in a near-by bird bath as detectives found blood in the bird bath. since the murder took place before dna fingerprinting was available, the suspected killer, ronnie, went free. detectives are now reviewing the blood evidence using dna fingerprinting. based on the dna fingerprints of all possible suspects, who is james' killer?