Characteristics that give birds the energy they need to fly long distances are

a. strong breast muscles and wings.

b. aerodynamic feathers and lightweight bones.

c. divided ventricle and air sacs in lungs.

d. endothermic metabolism and fused bones.

Organelles that act like a digestive system which takes in nutrients, breaks them down, and creates energy rich molecules for the cell

DNA and RNA contain the code for making ...

Could the nursing assistant be held legally responsible for this action

Which statement decribes a chemical change?

How is a glacier formed?

The United States uses which source of energy to produce almost 40 percent of its electricity? A. solar B. water C. biomass D. wind E. coal

Which cell breaks down carbohydrates

What characteristic distinguishes the five groups of fungi?

A research colleague has provided you with a single cell to identify. briefly describe the steps you would take to determine which domain this cell would most likely belong to.

A new organism is discovered in the forests of Costa Rica. Scientists there determine that the polypeptide sequence of hemoglobin from the new organism has 72 amino acid differences from humans, 65 differences from a gibbon, 49 differences from a