El modelo de Watson y Crick para la estructura del ADN afirma que este polímero es: *

Many kangaroo rats live in the sonoran desert of the southwestern united states. they have a variety of adaptations for living in the desert. under which circumstance would the kangaroo rats of the sonoran desert be most likely to develop new adaptations by natural selection?

Which of the following cell structures is significantly different between gram- positive and gram-negative bacteria?

In the sentence "a mining company will consider the distribution of coal when deciding how to mine the coal," what does the word distribution mean?