A population of California Sheephead (fish) in a kelp forest was 50,000. Due to the increasing levels of trash in the ocean, the birth rate was only 125 and the death rate was 15,321 for last year. No California Sheephead immigrated into the kelp forest, but 572 emigrated. What was the total population at the end of last year?

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? question 8 options: the cold balloon expands and rises. the warm balloon shrinks and sinks. the balloons rise at the same rate. both balloons are the same size. the ballons both rise. the cold ballon is larger than the warm balloon. the warm balloon expands and rises. the cold balloon shrinks and sinks.

20 the compound al(nh3)2 has atoms of nitrogen.