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statuscvo [17]
2 years ago
9

Help please don't know the answer​

Biology
2 answers:
kolezko [41]2 years ago
7 0

Answer:

c is not about the evidence of fossil fuels

olga55 [171]2 years ago
6 0

Answer:

what is it

Explanation:

show me

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Which of the following represent features of technology? Check all that apply.
IgorC [24]

Answer:

Explanation:

draws from a narrow range of basic sciences.

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7 0
3 years ago
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This is the unequal distribution of ions across a cell membrane.
Nady [450]

Answer:

Concentration gradient

Explanation:

Concentration gradient of the ions across the membrane generates the membrane resting potential.

Concentration gradient means that there is unequal distribution of the ions on different sides of membrane. For example, the concentration of K ions is much higher within the cell then out of the cell. Opposite is with the Na ions. When ions move from the area of their higher concentration to the are with the lower concentration, we say they move down the gradient or diffuse (no energy required). On the other hand, movement of ions against their gradient means that this process requires energy and involves protein pumps.

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3 years ago
A good scientifific blank can be repeated by someone else and the same results will be found
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1 year ago
In response to high amounts of phosphate transport into the cell: a. PhoR is phosphorylated by the phosphate transporter protein
storchak [24]

Answer:

e. PhoU keeps PhoR bound to the phosphate transporter protein Pst

Explanation:

PhoU is a membrane protein known to regulate the transport of phosphate (Pi) between cellular compartments. It has been discovered that mutations in this protein cause lethality because the cell becomes incapable of controlling the intracellular levels of  Pi, this being toxic for the cell. PhoR is a histidine kinase/phosphatase. When the Pi level is considered to be a limiting factor, PhoR autophosphorylates at a histidine residue and then donates its phosphoryl group to PhoB. On the other hand, when the Pi level is high, this protein removes the phosphoryl group from phospho-PhoB. Finally, the Pst is a signal transduction protein that acts as a transporter capable of switching its conformation during the transport of PI.

5 0
3 years ago
What is quadrat sampling
xxMikexx [17]

Answer:

Quadrat sampling is a method by which organisms in a certain proportion of the. habitat are counted directly. It is used to estimate population abundance, density, frequency and. distribution. The quadrat position are chosen randomly or they are placed along a transect.

Explanation:

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