Ewaste is a problem because it contains many hazardous chemicals like mercury, lead and cadmium which could seep in to the soil and eventually to the groundwater. This would lead to contamination of the drinking water. The most important thing to remember would be to separate this type of waste with the others. It would be better if you sell it or give it for reuse. Also, you can send it to a recycler that knows what to do with these wastes.
A population of frogs with
slightly different coloring is an example of microevolution. Microevolution is
the changes in the gene pool of a population that can be measured and observed in
short periods of time within a population. Microevolution can take place in
several ways such as gene flow, genetic drift, mutation and selection.
Answer:
B
types of cells, which work together cooperatively.
Explanation:
The hierarchy for an organism is (small to large):
organelles < cell < tissue < organ < organ system < organism
A tissue is made of one or more types of cells.
For A, although types of acids are in the tissue, the acids make up the cell so the acids are already included.
For C and D, organs and organ systems are larger than tissues. What something is made of must be smaller than what it is.
Answer:
Red algae - acquired plastids by secondary endosymbiosis
Explanation:
Red algae are believed to have undergo a primary endosymbiosis event. Then a second endosymbiosis event created a large group known as heterokonts. During the primary endosymbiosis event red algae acquire their plastids.
