D. She should look for ovals full of green dots called chloroplasts.
Emperor penguins have the ability to 'recycle' their own body heat. The arteries and veins lie close together so that blood is pre-cooled on the way to a penguin's feet, wings and bill and warmed on the way back to the heart. Emperors' feet are adapted to the icy conditions
Answer:
Communication or signaling between different cells is called intercellular signaling, and signaling or communication within a cell is called intracellular signaling
Explanation:
The binding of the signaling molecule or ligand can be divided into two types based on location their receptors. These signals molecule can bind to the cell surface receptors or intracellular receptors.
Intercellular signaling is signaling between cells. Membrane-bound vesicle transfer has an important this signaling in these signaling in humans and animals. examples of such signaling are hormone signaling.
When signals move from the cell surface to intracellular receptors this process intracellular signal. The receptors of these signaling include transcription factors that function to manage the gene expression.
