I'd say heat, more specifically sunlight.
Why?
Because sun is the form of energy needed for plants to grow and live. Plants in turn are the form of energy needed for herbivores to live that later on turn out to be the form of energy needed by the carnivores. When these die, decomposers will be the ones to take advantage of the energy.
As you can see an ecosystem has already been formed: producers, secondary consumers, tertiary consumers or decomposers.
Hope it helped,
Happy homework/ study/ exam!
Answer:
Explanation:
1. ----------manganese----------- is found in animal foods like meat and poultry, whereas the-----copper--------------- form is found in plant foods like grains and vegetables.
2. The metal and trace mineral --------selenium---------------------- is part of several enzymes and proteins.
3. Adequate ------------------zinc------------------------- is important for maintaining a healthy immune system and may aid in wound healing.
4. ---------manganese---------------------- acts as an antioxidant and aids in thyroid function.
5. ------flouride----------------------------- is not considered essential, but it is very important for maintaining strong, healthy teeth.
6. The deficiency disease goiter was much more common before --------------heme iron-----------was added to salt in the United States.
7. -----------non heme iron---------------------acts as a cofactor for a variety of enzymes and also plays a role in synthesis of bone.
D makes the hormones cause by nervous systems
Answer:
1.623
Explanation:
There's a general rule about the movement of energy through the trophic levels. That rule says that every next trophic level gets 10% of the energy from the previous trophic level. If there are 1,623 calories in the first trophic levels, then the second trophic level will receive 162.3 calories. The next, third trophic level will receive 16.23 calories while the last fourth trophic level will receive 1.623 calories.
