Classify the structures as homologous or analogous, depending on their structure and function. 1.arms of humans and wings of bats 2.fins of dolphins and flippers penguins 3.legs of humans and limbs of elephants 4.feathers of birds and scales of reptiles they MUST go into these two categories

Explanation:

it wont let me add an answer up top so

1.analogous

2.homologous

3.analogous

4.analogous

satellites are frequently used to make observations of the orbit on earth

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.