Answer:
(b) Voltage gated
Explanation:
The cell membrane acts as a barrier that separates two aqueous media of different composition, the extracellular and the intracellular, regulating its composition. Most of the liposoluble drugs and solutes, when not ionized, directly cross the cell membrane through a passive diffusion process, which facilitates the passage of the medium where it is more concentrated to the one that is more diluted. The difference in concentration between the two media is called the concentration gradient, and diffusion will continue until this gradient is eliminated. According to Fick's law, the speed of this process will be much faster the higher the concentration gradient and the liposolubility of the molecule and the smaller its size.
More hydrophilic molecules, such as ions, are immiscible in membrane lipids and pass through specific specific transport mechanisms. In some cases, ions pass through hydrophilic pores called ion channels, and in others a favor of their concentration gradient is transported by binding to the transporter or transporter proteins. Both transport systems are passive and therefore do not consume energy. The great advantage is that the ion channels allow the flow of ions through a much higher speed than that of any other biological system. The flow of ions through each channel can be measured as an electric current, which is capable of producing rapid changes in membrane potential.
• Classification allows for organisms to interbreed and change.
• A system was needed to better track genetic changes in an organism.
Classification allows for better identification of new organisms.
A system was needed to see microscopic organisms with more detail.
Discovering a new type of cell or bacteria
Answer:
1) Ecosystem 1 has more abundant and consistent resources.
2) The rate of decrease in the number of species in ecosystem two reflects a disruption of the food web.
3) Ecosystem one has a broad range of trophic levels providing more stability.
4) Ecosystem two has fewer ecological niches which limits the ability of species to adapt to change.
Explanation:
Fossils Dinosaurs
Explanation:
Fossils are the preserved remains of organisms that has once lived. They are made up preserved remain of their body parts or activities as the case may be.
Dinosaurs are a group of large sized carnivores and herbivores that lived during the mesozoic.
- Remains of their body parts have been found rock layers.
- The Sahara desert in some part of Niger in Africa has provided good fossils of dinosaurs for paleontological studies.
- The imprints of some the activities of these organisms have also been found.
- Fossils are very good sources to show the existence of ancient lives.
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Fossils brainly.com/question/9415077
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