What would happen to the signaling cascade if phosphatases were nonfunctional? (write the letter for your answer in the space provided) a. It would stop in the absence of ligand. b. It would slow down in the absence of ligand. c. It would continue in the absence of ligand. d. None of the options are correct, and here is an explanation of why:

the element that provides strength to the exoskeletons of clams and oysters is phosphorus. this is so because calcium carbonate is the main component in the shells.

explanation:

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate