Which explanation is most consistent with how long digits develop in bat embryos? a) Digits start the same length and some grow longer.
b) All digits start out long and some get shorter.
c) Initially the forelimb only has one digit; later, long digits form from the webbing.
d) As embryos use their wings in the womb, digits grow.​

it would lead to upper respiratory infections and pneumonia.

explanation:

the universal gravitation equation. since the gravitational force is directly proportional to the mass of both interacting objects, more massive objects will attract each other with a greater gravitational force. if the mass of one of the objects is doubled, then the force of gravity between them is doubled.

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.