|will give brainliest if correct|
kepler proposed the modern model of the solar system.
true or false

The correct answer is True

Explanation:

Johannes Kepler was an important astronomer that lived from 1571 to 1630. He was mainly recognized for proposing a set of laws to describe the way planets move, and the general model of our solar system. In this model, the planets orbit around the sun, the orbitals of planets are elliptical and the sun is not in the center of the orbit. This model disproved other models that proposed orbits were circles, and due to its accuracy it was widely accepted; indeed this is still used nowadays and has been proven through observations, calculations, and experiments. Thus, it is true Kepler proposed the modern model of the solar system.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!