Which enzyme unwinds and separates the two strands of the DNA double helix?

Blastula cells are stem cells, why is this so important?

What is cellular respiration? Include the reactants (inputs), products (outputs) and biological importance of this process in your description.

All living things contain organic compounds. True False

Approximately 3.5 billion years ago photosynthetic organisms evolved. what dramatic change is earths atmosphere resulted primarily from this event

The strategy of vaccination to fight diseases uses what type of immunity? A. Non-specific immunity B. Cell-mediated immunity C. Natural immunity D. Specific immunity E. Passive immunity

What theory proposes that evolution occurs steadily (slowly) in tiny changes over long periods of time? A. Gradualism B. Relative dating C. Natural selection D. Punctuated Equilibrium

The purpose of the right ventricle is to: receive blood coming back from the lungs pump blood to the upper and lower body pump blood into the lungs to be oxygenated receive blood back from the upper and lower body

A client has been admitted for observation after a closed head injury. there is clear fluid leaking from the client's nose. how would the nurse assess if this drainage is csf

Sound is an example of what type of wave?

Give four examples of ecological interdependence