Answer:
d is the correct one
Explanation:
The brain and the spinal cord are the central nervous system
The statement that is true is active transport moves against the concentration gradient.
<h3>WHAT IS ACTIVE TRANSPORT</h3>
Active transport is one of the two types of cellular transport that involves the movement of molecules against a concentration gradient.
This moves that movement occurs from a region of lower concentration to a region of higher concentration. Since movement is against a concentration gradient, it involves input of energy (ATP).
Therefore, the statement that is true is active transport moves against the concentration gradient.
Learn more about active transport at: brainly.com/question/2503897
Climate is the long-term average weather conditions that occur in a particular region. Climate depends on how average weather conditions change throughout the year.
When a cell needs to move a molecule many times, it uses vesicles<span>. </span>Vesicles<span> are cellular organelles that are composed of a lipid bilayer. You can think of </span>vesicles<span> as cellular envelopes that are used to transport materials from one place to another. </span>Vesicles<span> also </span>function<span> in metabolism and enzyme storage as well.</span>
This variation is an example of disruptive selection. The other choices given in the question are incorrect and can be easily neglected. The correct option among all the options that are given in the question is the fourth option or the last option. I hope that this is the answer that has come to your desired help.