What are the roles of covalent bonds and hydrogen bonds in the structure of DNA?

Plants can often be propagated from stems but rarely from roots what features of shoots account for this difference?

Hemlocks are a common type of tree in the northern forests of the United States. In studying one forest, a forester noticed that mature hemlocks were abundant but there were very few young hemlocks. She wondered why there were so few young hemlocks.

Oxidation happens when minerals in rock react with?

I need information and questions on sharks

What three things might influence a slide when conditions are right? What types of material can make up a flow?

15. An ear hematoma associated with otitis externa is most often found A. in the middle ear. B. on the eardrum. C. in the external auditory canal. D. on the underside of the pinna.

What my happen to an organism when is living Spaces destroyed

What are the two components of the central nervous system ap bio?

As a member of the ecological community, humans are classified as

How are the penguins in Antarctica being affected by climate change? Give at least 3 examples. Answer in 5 to 7 sentences.