Answer:
Until recent history,extinctions have always happened gradually and on a small scale.
Explanation:
Extinction occur when environmental factors like natural disaster,habitat fragmentation,over exploitation,global change don't favor the survival of species thus gradually leads to extinction of species.
Some times human activity becomes the major problem for extinction.More over,poor reproduction,decline in population number and genetic inbreeding also leads to extinction.
99% of all species that exist on earth become disappeared.
Evolution leas to speciation which leas to formation of new species but species become extinct when they are unable to survive against competition.
It would probably be .D. Plankton populations decreasing.
Answer:
In this, the controlled variables are stirring and type of sugar. As more stirring might elevate the amount of sugar that dissolves, and different kind of sugars might dissolve in distinct concentrations. So, in order to make sure a fair test, there is a need to keep these variables similar for each cup of water.
Explanation:
Answer:
true
Explanation:
Plants appear green because they contain a pigment called chlorophyll. Chlorophyll absorbs lights; however, the green light is not absorbed but reflected, making the plant appear green.
Answer:
nitrogen is an essential nutrient for sustaining life on earth, without it, plants would die, then herbivores due to starvation, and so on
Explanation:
