What is true of inter cellular signals that do not go through direct connections between cells such as plasmodesmata?
a. an ion linked channel to the nucleus opens up
b. a receptor molecule accepts the signal and transports it inside the cell
c. the signal fails to reach the inside and the cell does not respond
d. the signal is transferred to an adjacent cell for signal transmission
i will give brainliest answer to the correct answer with an explanation.

What do all macromolecules have in common with each other? oa. they all are formed from the same elements. ob. they all have major roles in cell membranesoc. they all act as catalysts in the body. od. they all have peptide bonds between carbon atoms.

Which of the following molecules can be broken down into simple sugars? a. nucleic acid b. protein c. lipid d. carbohydrate

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.