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wariber [46]
3 years ago
12

2. Which of the following describes the cytoskeleton?

Biology
1 answer:
belka [17]3 years ago
6 0

Answer:

A

Explanation:

A web of proteins that gives shape and support to the cell.

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How many people lived in North America before the Europeans arrived ?
diamong [38]

Answer:

While it is difficult to determine exactly how many Natives lived in North America before Columbus, estimates range from a low of 2.1 million to 7 million people to a high of 18 million.

Explanation:

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Water molecules have a strong attraction to one another.
vampirchik [111]

Answer:

The correct answer is B: Cohesion

Explanation:

<u>Cohesion</u> is the ability of water molecules to be strongly bonded together. This happens due to the polarity of water molecules. Since water is made up of two positive hydrogen ions that combine with one negative oxygen ion to form a hydrogen bond. Hence, the molecular structure of water enables hydrogen irons to attract oxygen ions that create a strong polar bond between water molecules.

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3 years ago
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According to Darwin's theory of evolution, how do new species evolve?
Vikki [24]

Answer:

According to Darwin's theory of evolution, new species evolved as a result of natural selection.

Explanation:

  • Darwin proposed that speciation could readily occur through the prolonged action of Natural selection.
  • Natural selection allows the 'survival of the fittest' i.e. a more fit organism will have a better chance of survival than the less fit one.
  • The result of Natural selection could be positive,negative or balancing.
  • Evolutionary process in which the genetic changes confer a higher fitness to increase frequency of the organism over time in population is called positive selection.
  • Evolutionary process in which genetic changes decreases the organism's fitness resulting in its disappearance from the population is called Negative selection.
  • It may happen that a mutation benefits hetero-zygotes but not homo-zygotes and alleles maintain a intermediate frequency in population.This evolutionary process is called balancing selection.
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The second word in a scientific name is
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an adjective describing the species

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