What does the evidence suggest as a cause of the max extinction 65 million years ago

A) a great earthquake

B) a great flood

C) a meteor crashed to earth

D) a drastic temperature drop

In airports the control tower functions in directing air traffic and keeping all flights running smoothly like a command center. which part of the cell is analogous to this command center?

Cladistics is a way of classifying organisms by examining the characteristics of their ancestors and by depicting them in a cladogram.

The patient is an 85-year old female who presents to the emergency department (ed) with increasing shortness of breath, hypoxia, productive cough, and progressive weakness

What process allows DNA to stay within the nucleus during the process of expressing genes as proteins?

What is one difference between dna and rna? a. only dna contains the base adenine. b. only rna contains the base guanine. c. only rna contains the sugar fructose. eliminate d. only dna contains the sugar deoxyribose.?

How are the energy and wavelength of electromagnetic radiation related?

Why do pailsade tissue have the most chloroplasts?

Which scientific force is primarily responsible for maintaining control of your vehicle?

How does the jet stream disrupt weather

Occurs in essentially lifeless areas-regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. what type of change is this?