Cougars are predators that often eat weakened or diseased animals. This is a description of the of cougars.

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

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.

Explain what a zygote is. use the terms egg cell, sperm cell, and fertilization in your explanation.