Which way do the nitrogenous bases in dna pair up?

a) a and g; t and c
b) a bad c; t and g
c) a and t; g and c
d) a and a; t and t and g; c and c

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?

How are mutations continually being generated in a population (what are some of the causes of mutatuions? ) explain

Control of the body is accomplished by which of the following body systems? nervous system and circulatory system endocrine and repertory system circulatory and respiratory systems nervous system and endocrine systems