To what does “descent with modification” refer? a. All species come from preexisting species but stay basically the same.
b. Some species come from preexisting species and are changed over time.
c. All species come from preexisting species and are changed over time.
d. Some species come from preexisting species but stay basically the same.

I ALREADY KNOW ITS NOT D BUT MY TEST SAID THAT WAS NOT RIGHT AND I ONLY HAVE ONE MORE CHANCE PLEASE HELP

Which of the following choices is not an effective solution to the energy waste related to inefficient lighting? a. using low-pressure sodium lighting sources b. pointing lights on billboards and street signs upward c. placing light sources on time controls d. shielding light to direct it downward

When does dna replication(make a copy of itself)?

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them