Answer:
<u>d. Transport proteins within the membrane serve as a tunnel for molecules to enter the cell.
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Explanation:
Solutes are typically moved across the cell through either passive or active transport. The cells, surrounded by a bilipid layer or plasma membrane is amphiphlic- its polar, hydrophilic lipid heads face outwards, while their non-polar hydrophobic lipid tails face inwards towards each other.
While lipid-soluble molecules move across the layer easily, it is also difficult for charged and also large molecules to move across its surface, into the cell. Transmembrane channels, <u>embedded within the membrane</u>, help to maintain selective permeability as transport proteins, pores and gated channels. Simple diffusion happens as a method of passive transport in cells through plasma membranes.
The solutes travel through the plasma membrane in the process of diffusion from regions of high concentration to regions of low concentration; this occurs without the use of energy. <u>Molecules moving against their concentration require active transport mechanism to cross the membrane</u>.
Answer:
example of active transport is the sodium-potassium pump, which moves sodium ions to the outside of the cell and potassium ions to the inside of the cell.
The correct answer is D(<span>Neck, armpit, and groin). I took the test and know from personal experience.
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Answer:
3- spores produced in zygosporangia
5- important in the fermentation process
Explanation:
Zygomycota is a form of fungi that are more common or found in soil or on a rotting plant or animal entity. For example "Rhizopus stolonifer" is commonly known as black bread mold.
It has several characteristics some of which are:
1. spores produced in zygosporangia
3. important in the fermentation process
Began in the water
first evolved around 3500 million years ago
began as single celled organisms
