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notsponge [240]
3 years ago
12

List 3 risks of second hand smoke exposure for children

Biology
2 answers:
9966 [12]3 years ago
7 0
Respiratory infections
Severe asthma attacks
Ear infections
Slav-nsk [51]3 years ago
5 0
<span>Respiratory problems, such as bronchitis and pneumonia</span>
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PLEASE Help! Worth 45 points!
Svetllana [295]

Answer:

I believe the answer is d or b

3 0
2 years ago
PLEASE HELP AND FAST THANK YOU!!!
Zarrin [17]

Answer:

Statement 1: Homologous chromosomes line up at the equator in pairs.

Name of Phase: Metaphase 1

Sequence: 3

Statement 2: The cell replicates its chromosomes

Name of Phase: S-Phase, Interphase

Sequence: 1

Statement 3: Homologous chromosomes separate and move to opposite poles of the cell

Name of Phase: Anaphase 1

Sequence: 4

Statement 4: Spindle forms, DNA coils up in homologous chromosomes come together in a tetrad; crossing over may occur.

Name of Phase: Prophase 1

Sequence: 2

Statement 5: Events occur in reverse order of prophase 1

Name of Phase: Telophase 1

Sequence: 5

Explanation:

Following is a summary of the events of meiosis:

1. Interphase:

Prepares the cell for division. Duplication of DNA, duplication of centrioles occurs and the cell grows in size. At this stage the cell is diploid (2n).

2. Prophase 1:

First stage of Meiosis 1.The centrioles move to the poles of the cell, the nuclear membrane disintegrates, homologous chromosomes pair up (in the form of tetrad), form a chiasmata and then exchange segments of chromosomes with each other. This process is called crossing over.

3. Metaphase 1:

Involves the arrangement of the crossed over, homologous chromosomes on the metaphase plate which is sort of like a web of spindle fibers that originates from the centrioles.

4. Anaphase 1:

The tetrads arranged on the metaphase plate are pulled apart by the spindle fibers. This is the result of tension that build up in the spindle fibers as they grow towards opposite poles.

5. Telophase 1:

The last stage of meiosis 1. Involves the arrival of the chromosomes at the poles, the nuclear membrane starts to form and the chromosomes start decondensing. Telophase 1 yields 2 daughter cells with half the number of chromosomes as that in the parent cell.

Meiosis 2:

Meiosis 2 is exactly similar to mitosis. The only difference is that the haploid cells entering meiosis 2 do not duplicate their DNA. Meiosis 2 just involves the separation of the sister chromatids of homologous chromosomes.

  • As mentioned above, interphase does not occur before meiosis 2.
  • Prophase 2 involves the disintegration of nuclear envelope, centrosomes start moving to the poles.
  • Metaphase 2 arranges the chromosomes on metaphase plate.
  • Anaphase 2 separates the sister chromatids from the chromosomes.
  • Telophase 2 develops the nuclear envelope and separates the nuclei of the daughter cells into 2. Nuclear division id followed by cytokinesis (division of cytoplasm). Telophase 2 result sin 4 haploid daughter cells with one chromatid from each chromosome.
7 0
3 years ago
(Score for Question 3: ___ of 2 points) 3. Sketch some of your observations from the lab. Answer: (Score for Question 4: ___ of
solniwko [45]

The type of microscope which would be the best tool to use to view the surface of a bacterial cell is a Scanning electron microscope.

This is because it can be used to look at the surface of objects at high resolution. Maximum magnification: Approximately 500,000x. Best for: Looking at surfaces of objects

<h3>What is a Microscope?</h3>

This refers to an optical instrument that is used for viewing very small objects and can be magnified several hundred times.

The type of microscope which would be the best tool to use to view the surface of a bacterial cell is a Scanning electron microscope.

This is because it can be used to look at the surface of objects at high resolution. Maximum magnification: Approximately 500,000x. Best for: Looking at surfaces of objects

Hence, we can see that your question is incomplete, so a general overview was given to you, and only the last question was answered.

Read more about microscopes here:

brainly.com/question/543989

#SPJ1

8 0
1 year ago
Increased carbon in the oceans has caused the pH levels of the water to decrease. What is the largest impact of this ocean acidi
vitfil [10]
The answer is A as corals are very delicate to their surroundings 
3 0
3 years ago
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What chemical stimulates the gallbladder to send bile into the small intestine?
klio [65]
The chemical is called Cholecystokinin,it helps<span> stimulates the gallbladder to contract and release stored bile into the intestine
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3 years ago
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