Which of these statements is true of scientific theories

A. They are the beginning of research

B. They are the last step in an experiment

C. They can change over time

D. They can never be proven wrong

In E. coli, which protein is central to the process of strand invasion? -RecA -RecD -RecB -RecC -RecUV

What happens if a population is not in hardy-weinberg equilibrium apex?

Mitochondria and chloroplasts have similarities and differences. All BUT one of the characteristics on the list above are similarities between mitochondria and chloroplasts. That is A) convert energy. B) have its own DNA.

a student conducts an experiment to determine if ultraviolet light kills bacteria. his result do not support his hypothesis. we say that the hypothesis is

Sea water is dangerous to drink

When an accurate experiment is repeated by another scientist, the results A) should be similar to those obtained originally. B) will be identical every time the experiment is repeated. C) should be completely different for a different scientist.

1. Which of the following forms all matter?

True or false Sedimentary rock can be formed from changes in igneous rock, but igneous rock cannot be formed from changes in sedimentary rock.

When a protein is denatured, why does it lose its functionality?

This is a rotating machine that converts the kinetic energy of the wind into mechanical energy. If the mechanical energy is used directly by machinery, such as a grinding stone, the machine is usually called a windmill.