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vekshin1
3 years ago
5

myelinated axons have gaps every so often for sodium ions to enter and refresh the action potential. what is one called?

Biology
1 answer:
Korolek [52]3 years ago
7 0
The gaps are called nodes of ranvier
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Which statement describes Redi's experiment, which helped disprove spontaneous generation?
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Answer:

He examined covered and uncovered meat to determine that maggots came from eggs.

Explanation:

Prior to Redi's experiment and other supporting experiments, it was formerly believed that life could emanate from non-living things, for example, the generation of maggots from rotting meat.

In 1668, a scientist called Francesco Redi disproved the idea of spontaneous generation. He did this when he experimented that the maggots from meats are only as a result of eggs laid by flies when they perched on the meat.

He placed the meat in two jars; an uncovered jar and another in a covered jar with a cloth, after several days, the uncovered jar had maggots on the meat, while the covered jar had no maggot on the meat, but on the cloth. With this experiment, he was able to demonstrate that the maggot arose from the eggs of the flies, not the meat itself which is nonliving and hence, disproved the idea of spontaneous generation.

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over a period of years the average rainfall in an area has decreased causing environmental changes most likely to survive these
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a population of mealworms because they do not need water at all

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Males will have chromosomes ____, while females will have ____.
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Answer:

Females have two copies of the X chromosome, while males have one X and one Y chromosome. The 22 autosomes are numbered by size. The other two chromosomes, X and Y, are the sex chromosomes. This picture of the human chromosomes lined up in pairs is called a karyotype.

Explanation:

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What is the base pairing rule for dna?
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Adenine pairs with thymine (or uracil), and guanine pairs with cytosine.
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The most apparent difference between modern humans and Australopithecus africanus is that Australopithecus africanus
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Answer:

The correct answer is option d.

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An extinct species of australopithecine, that is, Australopithecus africanus was the first species to be illustrated. It was of gracile or slender build and was considered to have been the direct ancestor of modern humans. Like modern man, the A. africanus did stood upright and walked upright, and were having free hands to use. However, they were smaller in height and lighter in weight in comparison to modern man.

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