Which contribution to the body of scientific knowledge is most recent?

the development of the lever

the confirmation of the double-helix structure of DNA

the discovery of electricity

the theory of evolution

20. How did Darwin's hypotheses about evolution become scientific theories?

Scientist observes a pair of separate chromosomes that have genes for the same trait ranch in the same order however some of the release of the genes are different what is the scientist most likely observing?

If cyanobacteria never evolved during earth's history, how would their absence affect the composition of earth's atmosphere?

Which of the following best describes a production quota ? A. Droughts in parts of midwestern US has resulted in lower production of corn. B. Sugarcane growers want to influence the government to limit their production to raise the price. C.

What is the purpose of connective tissue?

How are seeds different from spores? A. seeds have endosperm which provides nourishment for a new plant, but spores do not have any food supplies B. Spores involve egg and sperm cells, while seeds do not C.

What type of extreme weather does global warming cause?

Just as the body has different levels of organization, such as cells, tissues, organs, and organ systems, so does an ecosystem.

The electric signal for a contraction passes rapidly from one heart muscle cell to the next by way of

What is the BEST example of Newton's 1st law of motion? Group of answer choices A rocket will push off the ground with the same force as the ground pushes on the rocket.