What is a nitrogenous base?

a. a molecule that combines nitrogen with an alkaline metal
b. a nitrogenous molecule that combines with other elements with a hydrogen bond
c. a nitrogenous molecule that is combine with small amounts of sugar
d. a molecule that combines nitrogen with other elements

Which of the rock examples below is most likely to be metamorphic

Some plants rely on the wind to reproduce an example is it’s important for plants to use the forces of nature to reproduce because 1. 1a white tuft of dandelion seeds 2a spiked burrs surrounding seeds 3a hard shell on a walnut? 2. 1b require pollination to reproduce 2b reproduce only asexually 3b cannot move about freely?

Two critical interventions to turn around the opioid crises are: