Which of these animals is considered a model for punctuated equilibrium?

a. whale

b. ammonite

c. Archaeopteryx

Variations within a species are an important part of Charles Darwin's theory of evolution. Which example can be explained by individual variation?

Since bacillus megaterium are non-motile, they may not be able to avoid harmful toxins in the environment. b. megaterium is known to have endospores; why would endospore formation be advantageous for this bacterium? choose the best answer (s).

Which hormone is secreted by Beta cells of islets of Langerhans?

Your friend says the helium in your birthday helium balloon comes from radioactive decays. what is your response?

I have a DNA sequence of ACA TGA, and a mutation happens. The new sequence is AAT GA. What type of mutation was this?

Which process connects glycolysis and the citric acid cycle?

Reform movements of the 1800's was most likely influenced by what event in Europe? A. Governments were slow to act. B. Populations were increasing rapidly. C. Revolutions were spreading across Europe. D.

What's the definition of chemical energy

Once pathogens have penetrated the non-specific barriers, they are confronted by macrophages and natural killer cells. how do these cells contribute to maintaining homeostasis?

What happens when a plate carrying oceanic crust collides with a plate carrying continental crust?