HELP I AM IN AN EXAM AND I NEED HELP PLEASE I WILL MAKE BRAINLIEST!!!The picture shows two different species of mammals that use wings to glide among tree tops. However, scientists theorize that these mammals are not closely related.

Which best explains why these two animals look so similar if they are not closely related?

They have analogous structures that developed for different functions.
They have homologous structures that developed for different functions.
They live in similar environments and have analogous structures adapted to them.
They live in similar environments and have homologous structures adapted to them.

They live in similar environments and have analogous structures adapted to them.

Explanation: Analogous mean comparable in certain respects, typically in a way which makes clearer the nature of the things compared. So if they are not releatd then they are connected to there shared environment.

the grams   of   barium that   are in   2.3 x 10^23   atoms of barium   is   52.4 g (answer c)

    calculation

mass = moles   of ba   x molar   mass of ba

  molar mass of ba from periodic table=   137.3 g/mol

  use the   avogadro's law   constant   to   calculate the moles of barium

  that   is     1 mole =   6.02   x 10^23 atoms

                    ? moles = 2.3 x 10^23   atoms

by cross   multiplication

=(1 mole   x 2.3x 10^23 atoms)   / 6.02   x10^23 atoms)=   0.382   moles

mass   is therefore = 137.3   g/mol x 0.382 mol = 52.4 ( answer c)

explanation: