E) All of the answers are correct.
Ion channels are proteins located in the membrane that allow ions to pass through the channel pore. Ion channels can be classified (by what opens and closes the channels) into few groups:
• Voltage-gated channels-open and close in response to membrane potential
Examples: Voltage-gated proton channels, Voltage-gated sodium channels, Voltage-gated potassium channels
• Ligand-gated (neurotransmitter) or ionotropic receptors (ligand binds to extracellular domain of the receptor
Examples: "nicotinic" Acetylcholine receptor, ionotropic glutamate-gated receptors
• Lipid-gated- lipid molecules bind to the transmembrane domain of the channel
Example: Inward-rectifier potassium channels
• Light-gated channels-like rhodopsin channel that is directly opened by photons
• Mechanosensitive (e.g. stretch, pressure) ion channels.
A- they can digest insects :)
You failed to include the picture that goes with the question. However, the oldest fossils will be the fossils in the oldest layer, which is the lowest layer of sediment. Sedimentary rock forms as mud and silt pile up over thousands and millions of years. The layers of sediment harden and become rock. Organisms that are trapped in those layers become fossils as additional layers pile on top of them, forming new layers of sediment.
Answer: See explanation
Explanation:
1. The factors that should be considered when evaluating the costs and benefits of a new innovative process include the cost to build, the effort and time to implement and the maintenance and recurring costs. Therefore, the correct options is D. I, II and III.
2. The factors that will contribute to a measurement of environmental quality is the Salinity levels. Therefore, the correct option is C.
3. If all the other costs and benefits are equal, then the product that will be recommended will be option A "Product 1 because it requires less monitoring, reducing the overall cost"
Since Product 1 requires monitoring once in three months while Product 2 requires monitoring once every week, then we can deduce that product 2 will increase the overall cost.
4. The option that describes the relationship between human population size and resource use is option A "Countries with high populations are likely to use more resources".
When there's an increase in population, the people will make use of more resources when compared to an area with lesser population. Therefore, the correct option is A
The nictitating membrane's function is to provide the eye with a special extra level of safety while the creature is still able to see.
