This process is active transport.
Unlike other methods such as diffusion or osmosis, active transport requires extra energy provided by the organism from such as cellular respiration. In addition, they also require a carrier protein, which can change its shape to bring the substance through the cell membrane.
Some examples requiring active transport may include root hair cells absorbing mineral ions, or our small intestine absorbing digested nutrients into our body.
Answer:
Animals can react to climate change in only three ways: They can move, adapt or die. Many animals are moving to higher elevations and latitudes to escape warming temperatures, but climate change may be happening too quickly for most species to outrun it.
Explanation:
Answer:
b. Bacteria with the desired plasmid produce white colonies.
Explanation:
The bacterial lacZ gene is usually used as a reporter gene, which encodes beta-galactosidase, an enzyme that breakdown lactose but can also breakdown a colourless synthetic analog X-gal, thereby producing blue colonies on X-gal–containing media. But the lacZ will be disabled when the recombinant DNA is spliced into the plasmid. This is because the LacZ protein will not be produced when the gene is disabled. Thus, X-gal will not be broken down and white colonies will be produced, which can then be separated and identified.
Answer:
If a checkpoint fails or if a cell suffers physical damage to chromosomes during cell division, or if it suffers a debilitating somatic mutation in a prior S phase, it may selfdestruct in response to a consequent biochemical anomaly.
One way to tell is to use nutrient density. Nutrient-dense foods contain high levels of essential nutrients per calorie; foods low in nutrient density contain few nutrients per calorie.