They allow passage for large molecules which cant normaly diffuse throught the phopholipid layer and import and export ions
Answer:
Many of these creatures have special pigment cells called chromatophores in their skin. By controlling the size of the cells they can vary their color and even create changing patterns. Chromatophores are connected to the nervous system, and their size is determined by muscular contractions.
Answer:
The efficiency of the hair dryer is 0.2 or 20%
Explanation:
The efficiency of a machine or any appliance is a measure of the useful work done by the machine when an effort is applied to the machine. The higher the efficiency of a machine, the more useful work the machine does.
Due to the economical and environmental impact of energy production, machines and appliances of high efficiency are being developed and recommended for domestic as well as industrial use nowadays.
In electrical appliances, energy is usually supplied by electrical power units. The higher the efficiency of an electrical appliance, the less power it consumes to do useful work. For a hair dryer which takes in 3000 J of energy per second and transfers 600 J of useful heat energy, its efficiency is calculated with formula below:
efficiency = useful energy / total energy input
Efficiency = 600 J / 3000 J = 0.2
Therefore, the efficiency of the hair dryer is 0.2 or 20%
The central nervous system (CNS) of the body, because the nucleus maintains and controls the functions of the cell, and the CNS does that for the body.
Answer:
1. They Live in lower water habitats meaning that if that water could suddenly rise they'd drown and so will their eggs when they hatch.
2.During the summer they migrate to prairie lands and return. If water levels suddenly increased then the snakes would have to leave as soon as they come.
3. New species would adapt and take the previous habitat for their own.
Explanation: