It says its small on google
Answer:
A. movement of molecules across a semipermeable membrane against a concentration gradient with a protein
D, you have the right answer. Kalanchoe plants produce asexually
<span>The correct answer is b. Option a is incorrect because these models can demonstrate scientific theories, but they don't prove scientific theories (you would need experiments for that). Option c is incorrect because the models aren't always representing something abstract (i.e. DNA is very real, just very small). Option d is incorrect because they don't precisely mimic something in nature, but instead help us visualize something in nature that is difficult to see or comprehend.</span>