The answer is D. Food Threshold is the amount of food capable on feeding the organisms.
Exoskeleton
Exoskeleton is a evolutionary innovation. This is operated by muscles attached to it and acts as an armor. Other than support this is an adaptive mechanism to provide protection against predators. In vertebrates, it is considered as the dermal bone that developed via membranous ossification. Fishes retained their exoskeleton in the form of their scales. However, in some organisms terrestrial evolution allows the loss of exoskeleton and formed a more mobile endoskeleton,
There really is no way unless both the parents are the are tall or short
Answer:They get there energy by autotrophs
Explanation:
They get there energy by autotrophs
<span>It's Denitrification: In the absence of oxygen bactaria break down nitrates releasing nitrogen back into to the atmosphere and using the oxygen for their own respiration</span>
