1. Which of these events can happen when galaxies collide? (1 point) Galaxies destroy their stars.
Galaxies triple in size
Galaxies disappear
Galaxies merge.

Which type of bond forms between water moleculesstrong bondhydrogen bondcovalent bondpolar bond

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?