<span>D.) He analyzed data collected by Tycho Brahe.
[ More Information. - Issac Newton </span>calculated the gravitational force on orbiting bodies, G. Galilei <span>examined the motions of planets through a telescope.]
Hope this helps!</span>
Ans.
Steroids are defined as active organic bio-molecules, having four rings with a specific molecular configuration. Steroids play role in two major functions: as hormones or signaling molecules and as structural components of plasma membrane.
Examples of steroid hormones are estrogen, progesterone, and cortisol. Thus, the correct answer is 'option b). they serve as chemical messengers.'
B) population because there is more than one in one species and types
