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Verizon [17]
3 years ago
12

The five basic stages of sleep are further classified into two distinct orders characterized by

Biology
1 answer:
Shtirlitz [24]3 years ago
5 0
When a person is sleeping, the body moves into 5 different stages which is characterized by a Rapid Eye Movement and a Non- Rapid Eye Movement sleep. The body usually spends 90 minutes in each of the stages. First stage is called the Transitional Phase, second stage is called a Non Rem phase, stages 3 and 4 are known as the deep stages of sleep and the 5th stage is the only Rapid Eye Movement.
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Plants sustain continual growth in length by repeated cell division within these types of regions . A. Antheridia B. Archigonia
san4es73 [151]

Answer:

D. Meristems

Explanation:

Like every other living thing, plants also undergo growth in size (length and width). This growth in length is a characteristics of the cellular division that occurs in a region called MERISTEMS. Meristems are those part of a plants that contain tissues whose cells are always young and actively involved in cell division.

The cells in the MERISTEMS called TOTIPOTENT, which are found at the top or apices of root, shoot etc are involved in continual division, hence, the regions they are found visibly undergoes changes in length as cells multiplies in that region.

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3 years ago
Protects cells made of cellulose allows materials in and out
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The cell wall is a rigid organelle composed of cellulose and lying just outside the cell membrane. The cell wall gives the plant cell it's box-like shape. it also protects the cell. The cell wall contains pores which allow materials to pass to and from the cell membrane.
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If an oil spill destroys a coral reef what kind of succession might eventually restore it
anygoal [31]

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Secondary succession

Explanation:

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how do you think an individual suffering from an asthma attack, chronic bronchitis, or emphysema might feel about exercising? in
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I think they would feel cautious about exercising and try not to push the limits.

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2 years ago
Why do cells go through the process of cell division?
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