A student wants to know if the weight of a cart affects its speed at the bottom of a ramp. He changes the weight of the carts by adding different numbers of balls, and he keeps the height of the ramp the same. What is his independent (test) variable?

The shape of the carts.

The angle of the ramp.

The weight of the carts.

The height of the ramps.

I think it’s b I could be wrong

Explanation:

a

explanation:

many plants naturally reproduce this way, but it can also be induced artificially. horticulturalists have developed asexual propagation techniques that use vegetative plant parts to replicate plants. success rates and difficulty of propagation vary greatly. monocotyledons typically lack a vascular cambium and therefore are harder to propagate.

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.