The core, or middle, of the Sun is the hottest part. Hot gasses bubble up from the core to the surface of the Sun. When the gasses burn, heat and light are produced.
Answer:
ur answer is A
Explanation:
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Answer: B - A battery with wires
Explanation: The mitochondria is the cells source of energy
Answer:
Associative learning may be defined as a type of learning in which the new response gets easily associated with the stimulus. Except habituation learning all simple learning procedure are included in this learning.
In the associative learning, reactions of an individual are based on there spank. George learns to cry on being spanked this is because this stimulus of sister cries gives response. Crying do not show any effect on ken because he does not know about his sister crying.
This is not a concern to scientists because this is an indication that a new species may be formed or in progress from the interbreeding.
Explanation:
We know that species are the populations that can mate to produce fertile and viable progeny. Speciation occurs when new species is form by a population which has separated and become reproductively isolated.
The two dogs living in Africa and America can mate and produce healthy offsprings and they are phenotypically different.
The mating of horse and donkey are different species because they produce infertile mule.
When two population of species that are phenotypically different mate they have overcome the mechanism of reproductive isolation.
