What are these organisms called that have two halves that fit together like the top and bottom of a petri dish and get smaller and smaller over time when they reproduce asexually

Diatoms

Explanation:

Diatoms are a group of algae especially found in the oceans (they also live in waterways and soils). The diatoms are known to generate about 25% oxygen on the Earth and 50% of the organic mass in the oceans. The shell of the diatom is composed by two halves or valves that overlap each other like petri dish halves, where the upper valve (epitheca) fits over the lower valve (hypotheca). Diatoms reproduce by both sexual and asexual (vegetative) reproduction. In vegetative reproduction, a single cell divides by mitosis and each daughter cell receives one valve.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

if the hares very faster than they are now, and thus the lynx's hunting success rate drops because it will be harder to catch them, the rate that will change will be the pray-rate. the pray-rate will change because more hares will be able to survive, thus more individuals for reproduction, so the end result will be increasing population of hares.

the predator-rate will remain pretty much the same because there will be more than enough pray, but the hunting success rate is stagnant.