Answer: I'm gonna say the answer is Mutualism.
Awnser is d hope this helps
Certain elements are required in large quantities, and others are required in small amounts by the body, but both are essential for the survival of the cells. The cells which are required in large amounts are called as macronutrients, while the ones required in small quantities are called as micronutrients, or trace elements.
Hence, the answer is trace elements or micronutrients.
The appropriate answer is a. to help scientists understand medical issues that cannot be tested on humans. Scientists often use animals that are easy to cultivate and have some similar anatomical feature to humans or have a feature similar to human organs or features. One of the most common model organism is the mice; a specially bred species used for testing in the lab.
Snout Shape: Alligators have a wide, rounded, u-shaped snout, while crocodiles have long, pointed, v-shaped snouts. ... Crocodiles are different from alligators in this sense, where both upper and lower jaws of a crocodile are the same size, exposing their teeth as they interlock, creating the look of a toothy grin.
