Which of the following is an example of positive feedback? a. abscisic acid (aba) in plants slows bud growth in cold temperatures. b. an increase in ethylene gas causes fruits to ripen more quickly. c. taking a tranquilizer slows the speed of signal transmission in neurons. d. panting in dogs increases the amount of cool air in nasal passages and lowers body temperature

The correct option is B.
Positive feedback refers to the amplification of an effect by its own influence on the process which give rise to it. Ethylene gas is a plant hormone which stimulates ripening. As the quantity of the ethylene gas that is released increases, the rate of ripening of the fruits also increases.

This is what i did 45-5=4040÷4=10so there are 10 white marbles but am not sure is just a question that am not sure

Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of  amino acids  , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in  genes  . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called  transcription  ), and the mrna is transported to the  ribosome  . protein synthesis, also called  translation  , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the  nucleotides  of mrna three by three, in units called  codons  , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the  amino acid  chain goes on to be processed and folded to make the final, functional protein