Question

1. which of the following is a testable hypothesis? a) \aliens exist in a distant galaxy.\ b) \the universe is infinite.\ c) \life originated on earth.\ d) \plants grow faster with more sunlight.\

Explanation:

A testable hypothesis is one that can be proved or disproved through experimentation. Option d can be tested by setting up experiments with plants under different levels of sunlight and measuring their growth rates. Options a, b, and c are difficult or impossible to test with current - day scientific methods.

Answer:

d) "Plants grow faster with more sunlight."