Sunspots are temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic field flux that inhibit convection. Sunspots usually appear in pairs of opposite magnetic polarity.
Weathering breaks down and loosens the surface minerals of rock. Hence, the broken rocks are transported to another place where it decomposes and forms soil. Therefore weathering is important for soil formation
Answer:
Only options a reflects the instances with valid experiment or conclusion.
Quality of any experiment depends upon two things reliability and validity. Reliability is measure of regeneration of results every time an experiment is performed under specific conditions.
Validity is measure of accuracy of results of an experiment. It can be check by two ways: internal validity (checks the design of the experiment) and external validity (checks if the conclusion is the real explanation of the phenomenon).
Now, in marine biologist experiment, he concluded the results only after one breeding season. This makes his results unreliable as it might have happened by chance.
Similarly, in cola experiment the taste was only checked by one candidate i.e. Karl. He might have problem in his taste buds. In addition, the temperature of cola can also affects its taste which is not taken care of in the experiment. Hence, it is not the valid experiment.
Similarly. Jeanette could use more plants for her experiment and Robert just followed only one instruction. He didn't perform any experiment.
Meta-population is the patchiness of population in space and its role is dynamic, population insatiability, coexistence of species, the maintenance of diversity.
Metapopulation is colonization and extinction dynamics. The variable of prime concern is the proportion.As the population largest approaches the environment carrying resources become more scare and growth rate slows.
The m maxima carrying number of species in environment can support indefinitely .A group of spatially separated population of similar organism which interact at some levels.It s population in which multiple populations as butterflies and cool reef fishes.Humans are evolved from multiple interconnected spread out across Africa in large meta-population.
To learn more about Metapopulation here
brainly.com/question/2167013
#SPJ4
Yes diffusion occur if perfume is spray
