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.
Answer:
The Answer is C
Explanation:
When scientists breed cows to produce more milk, this has not occured naturally and thus is not natural selection.
Answer:
Biodiversity is a variation of organisms (plants, animals and bacteria) in the world or a specific habitat. Biodiversity helps to keep an ecosystem healthy because there is more variation of food and different organisms can rely on each other for survival. Also it offers a larger more reliable food chain and if one species is suddenly wiped out, it won't impact the ecosystem as much as it would if the biodiversity was smaller.
Explanation:
Answer:
The correct answer is Smooth ER: protein synthesis
Explanation:
Endoplasmic reticulum is a single membrane-bound organelle containing interconnected membrane-bound cisternae which are the extension of the nuclear membrane. Endoplasmic reticulum is divided into two parts smooth endoplasmic reticulum and rough endoplasmic reticulum.
Smooth endoplasmic reticulum does not contain ribosomes on it and is involved in the synthesis of steroid hormones and lipids, detoxification of harmful products and removal of xenobiotic from the cell, calcium storage, and metabolism.
Rough endoplasmic reticulum has ribosomes on its surface which helps in protein synthesis on RER. So Smooth ER and protein synthesis are incorrectly matched.
POSSIBLE ANSWERS:
* Because they are likely to change more than one amino acid
* Frameshift mutations are likely to change more than one amno acid because different set of codons read, nonsense codon could be introduced causing premature termination
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