What is the present geological era?
a. cenozoic
b. mesozoic
c. paleozoic
d. precambrain

will mark brainleist if correct on test!

Ascientist is studying muscle twitches in chicken quadriceps. to activate the muscle, he needs to provide stimulus to the

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

Sara goes on a slingshot ride in an amusement park. she is strapped into a spherical ball that has a radius 3*10^2 of centimeters. what is the volume of air in the spherical ball? use this formula: volume of a sphere=4/3pi, r^3 , where r is the sphere’s radius.