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Lesechka [4]
3 years ago
12

The parents-to-be were shocked when an ultrasound scan done in the second trimester of the pregnancy showed a fetus with obvious

ly broken leg bones and ribs. the doctor diagnosed osteogenesis imperfecta. this is caused by the mutation in a gene that encodes
Biology
1 answer:
emmainna [20.7K]3 years ago
6 0
Collagen......
..................................
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Dang i cant quit do that off the top of my head sorry 
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The current system used for naming organisms was developed by who?
Alja [10]
Carolus Linnæus

<span> Taxonomy, responsible for many scientific classifications and influences in various field of life sciences or biology.  Evidences that Taxonomy uses to group or categorizes species range from </span><span><span>
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3 years ago
cell organelles In this lab, you will try to view as many cell organelles as you can at different magnification levels. Write an
CaHeK987 [17]

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.

5 0
3 years ago
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Which of the following body systems is the least directly responsible for the action described below?
lyudmila [28]

Answer:

endocrine

Explanation:

i got it right on the quiz thingy. hope u got it right cause there was a time limit. haha :)

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In the polymerase chain reaction, what is primer molecule made which of enables replication to commence?
docker41 [41]

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primers and a DNA molecule

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