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RoseWind [281]
3 years ago
11

Marine Lawyer when are they on the job

Biology
1 answer:
gladu [14]3 years ago
6 0

24/7 is the answer according to the internet

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A mutagen is
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Answer: The correct answer is-

an agent that causes a mutation in DNA.

Mutagen is an agent or a substance that causes permanent change in the genetic material of living organisms ( DNA, deoxyribonucleic acid). This process is called mutation.

A mutagen can be a chemical, physical or biological agent that causes mutation in the DNA.

Example- Physical agents such as -

  • Ionizing radiations like alpha particles, gamma rays,  X-rays that brings break in the DNA and cause other damages.
  • Ultraviolet radiations that creates pyrimidine dimers ( T=T) and causes replication errors if damage is not repaired.
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cell organelles In this lab, you will try to view as many cell organelles as you can at different magnification levels. Write an
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Answer:

What is the effect of power/magnification on the frequency and size of organelles under a microscope?

Explanation:

Organelles within the cell are responsible for carrying out various functions. Some cells are more specialized than others, and may have particular organelles at a higher frequency, or showing a variation in size; sub-cellular structures become more visible at higher magnifications under the microscope.

Hypotheses:

  • organelle A's frequency decreases while B's frequency increases at higher magnifications
  • organelle A's size increases while B's size decreases at higher magnifications

<em />

<em>Dependent variables: size and frequency cell organelles</em>

<em>Independent variable:  power/magnification at low (x4), medium(x10) and high  (x40)</em>

<em>Controlled variables: Type of organelles, microscope used, cell examined, </em>

Method:

1. Examine the organelles A and B in a cell mounted on a slide; use the fine adjustment to focus on the cell.

  • Frequency:  What is the average number of organelle A versus B, seen at low (x4), medium (x10) and high (x40) magnifications?
  • Size: Measure the average diameter of organelle A versus B using an ocular micrometer at low, medium and high magnification.

2. Record and tabulate observations.

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The __________ is the part of the brain thought to be responsible for a person's hunger drive. A. hypothalamus B. central cortex
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The best answer among the following choices to fill in the blank would be A).
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Which statement about air is correct?
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Air is essential for almost all organisms.

Explanation:

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The _________ are one of 3 Thigh muscles that connect the hip and Knee.
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The answer is hamstrings!! hope this helped. have a nice day:)
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