Answer:
A) They form chemical bonds with other atoms
Explanation:
In chemistry, a valence electron is an outer shell electron that is associated with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.
The correct answer is temperature.
Temperature is expected to increase due to climate change.
Temperature is the physical quantity cold and hot.
It is the proportional measure of the average of kinetic energy which is of random motions of continued particles, which is in the matter.
It is measured with a thermometer. Most important in all fields of natural science. For example, biology, chemistry, and earth science.
Answer:
The information is not sufficient to support this asumption
Explanation:
To unequivocally determine the existence of selection acting on this trait (size), it is necessary to carry out an experiment in which the sample size should be statistically significant (N sample for each group > 50). Moreover, it is also important to include negative controls (i.e., individuals with an average size between both groups) in the experiment.
<h2>Answer:
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Option A) Active transport.
<h2>Explanation:
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- Active transport - Movement of molecules or ions from a lower concentration to a region of higher concentration(against a concentration gradient), by the use of enzymes and consuming energy(ATP), hence the substances move across plasma membrane against a concentration gradient.
- Osmosis is the process in which molecules of the solvent passes through a semipermeable membrane(plasma membrane in case of cell) from a less concentrated solution to more concentrated one along the concentrated gradient.
Energy is not required in this process and hence it is passive process.
- Diffusion is the movement of the molecules of a material from higher concentration to lower concentration.
- Facilitated diffusion is similar to diffusion, it the transport of substances across a biological membrane from an area of higher concentration to an area of lower concentration by the help of a carrier molecule.
Result: Active transport happens against a concentration gradient.