Answer:
Secondary succession
Explanation:
When a previously occupied area is re-colonized after a natural disaster or human activities that wiped out the previous community, then the type of succession is called a secondary succession. A practical example is abandoned farmland that a farmer left for a period of time and later revisited for farming afterwards.
Because the pioneer organism( sun-loving plants ) were already on ground it will be fast for them to populate the area,grasses will sprout up too. insects, dentritivores, reptiles will move into the habitats.
After 5years;The habitat is populated by shrubs, which owns the forest floors. small pine, oak may soon join.a stable climax community.
Assuming the community is not interfere with bigger dominant trees , e,g the oak developed and other tree developed to bigger tree , followed by more insects, birds, rodents, herbivores and some carnivores, This entire sequence of event may take 50 years, to reach this climax community.
To test his hypothesis, the student will have to design an experiment to measure the effects of <u>temperature on cellular growth</u>.
To test the effects of temperature on cellular growth the student will have to create an experiment containing the there kinds of variables:
- Dependent
- Independent
- Control
In this experiment, the control variable will be the kind of cells used, as well as the incubation methods being used. We identify these as the control variable given that they will remain constant.
The independent variable will be the Temperature at which we will place each cell being studied. The dependent variable, on the other hand, is by definition, what we seek to measure. In the case given it would correspond to the amount of cellular growth.
To test his theory of the effects of temperature on cellular growth, a student can design an experiment in which the control variable will be the cells themselves, the independent variable will be the Temperature, and the cellular growth can act as the dependent variable.
To learn more:
brainly.com/question/9199868?referrer=searchResults
Respuesta:
B. pastoreo excesivo de animales de granja
Porque son lugares secos.
Explicación:
Las políticas e infraestructuras que promueven la agricultura en las tierras de pastoreo que no pueden mantener sistemas viables de cultivo, contribuyen a la desertificación. La mayoría de las áreas de tierras secas (el 65%) son tierras de pastoreo que son más adecuadas para el pastoreo sostenible que para el cultivo.
The myelin sheath is the layer of fat cells that insulates most axons and speeds up the transmission of nerve impulses.
Http://www.livescience.com/22537-skeletal-system.html
