how are variations in the spain- bound and uk - bound blackcaps related to the environment in which the birds spend their winters? construct an explanation based on evidence to describe the relationship between variation of traits and environment in the blackcap populations?

Chlorophyll is found in plant leaves and absorbs light from the sun to enable plants to perform photosynthesis. magnesium is an important component of chlorophyll. the concentration of magnesium ions is higher in the root-hair cells of plants than in the soil. which mechanism of ion uptake would best enable a plant to produce a steady supply of chlorophyll? osmosis diffusion passive transport active transport

The influenza virus cause the flu, but not other diseases. why?

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming