The diagram below shows an energy pyramid.

which of the following best explains why the number of organisms at each level decreases while moving up the energy pyramid?
a.
the animals at each level use energy, so only a small amount of their energy is available to the next level.
b.
the animals at higher levels move more than animals at lower levels, so they require more energy.
c.
the animals at each level have more predators, so they produce more offspring.
d.

i'll have to see   the diagram

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.