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

What rule states that chemical elements are made up of atoms?

Where do short-period comets originate? A. Oort Cloud B. Kuiper Belt C. main asteroid belt D. Trojan asteroid belt

Duchene muscular dystrophy, or DMD, is a recessive, x-linked disease. What would you expect to see in the offspring of a woman wh o has DMD and a man who does not have the disease? All of their sons and none of their daughters would have the disease.

It is a polymer that tesist all kinds of environmental damages? A. sapropollenin B. waxes C. cuticle D. lignin

Cytokinesis in animal cells is accomplished by constriction of the cell along the plane of cell division (formation of a cleavage furrow). In plant cells, which have cell walls, a completely different mechanism of cytokinesis has evolved.

Which of the following is the best example of homeostasis in the human body? and why?

Dna determines the structure of proteins produce by cells?

What does a organism that is still has many cells produce spores and gets food from the enviroment

What are the main features of a eukaryotic cell? How do these features differ from those found in Bacteria and Archaea?2.

What organelle is believed to have once been a free living prokaryote that moved into our cells and became a permanent guest? Select one: a. mitochondria b. nucleus c. cytosol d. none of these