The mouth is the beginning of the digestive tract; and, in fact, digestive starts here when taking the first bite of food
Answer:
Option B
Explanation:
Water soluble hormones associate with the G protein of cAMP. This G protein is intra-cellular i.e found inside the cell.
However in case of lipid derived hormones, the hormone has to diffuse through the cell across the plasma membrane to bind to DNA or the intra-cellular receptors.This regulates the gene transcription and induces protein production that affects the cell functioning for a long time.
Hence, option B is correct
Answer:
rockfall, mudflow, and landslide are three
Explanation:
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I believe the answer is B. they respond to stimulli
Answer:
Animal behaviour is controlled by the physiological mechanism
Explanation:
There are the known species of fish which communicate with each other through electrical signals or in the form of the electric field. This is known as the electrocommunication and the electroreception.
The communication between two fishes through the electric field is controlled by the physiological mechanism present in the fish and shows that the fish behaviour is controlled by the physiological mechanisms of the fish.
Thus, Animal behaviour is controlled by the physiological mechanism is correct.