Answer:
In grassland ecosystem, first trophic level is the producer. Producers are the organisms which makes their own food, here the producer are grasses. The second trohic level contain herbivores which feed on these grasses. These herbivores are eaten by secondary consumers which belongs to third trophic level and secondary consumers are then eaten by tertiary consumer.
The population of producers are very high so it is placed at the base while tertiary consumer are placed on the top due to low population.
Fuels are materials that react with other substances to release nulear or chemical energy as heat. Chemical fuels release energy via combustion. Nuclear fuels release energy by nuclear fission. Nuclear and chemical fuels are used for different purposes because of the complexity of deriving heat from them, the amount of heat generated and use in various applications.
By the excretory system through the large intestine
The flight or fight hormone, adrenaline
The whooping cough vaccine is harmless
for the patient and the baby. Doctors and midwives who major in in caring for
pregnant women approve that it is significant to be acquired throughout the
third trimester of pregnancy. Adults who are 19 years old and older must only acquire
one dosage of the Tdap vaccine.
