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qwelly [4]
3 years ago
6

1. Which statement regarding these

Biology
2 answers:
grin007 [14]3 years ago
8 0

Do you have a like text book for this for me to answer?

Anton [14]3 years ago
8 0

Answer: They are both forms of asexual reproduction

Explanation: They are from one single organism and are completely identical to the parent

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In red shift, the wavelengths of light become:
lukranit [14]

Answer:

The light is shifted to the red end of the spectrum, as the wavelengths get longer.<em> </em>

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3 years ago
Penny is an intensely shy person who rarely attends social gatherings. In addition, she normally will not accept dinner invitati
Nady [450]

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social anxiety disorder

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social anxiety disorder is the fear of being judged by people or negatively assessing them, or rejected in a social  situation

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3 years ago
Which of the following is a function of the spleen?​
Pavel [41]

Answer:

Clearance of microorganisms and particulate antigens from the blood stream.

Synthesis of immunoglobulin G (IgG), properdin (an essential component of the alternate pathway of complement activation), and tuftsin (an immunostimulatory tetrapeptide)

Removal of abnormal red blood cells (RBCs)

Explanation:

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2 years ago
When working with radioactive materials you must use radiation detection instruments. Which of the following instruments require
vampirchik [111]

Geiger-Muller tube is instruments requires you test three times the background of the work area.

<u>Explanation</u>:

These detectors are gas filled detectors and hence requires time for responding to the value. This time is taken because during this period it collects the electric charges and features of the electric circuit. It also gets stabilized during this period. This device has thumb rule i.e one must wait or hold for at the least 3 times the time constant before getting the precise and accurate reading. The time constant order is 10 seconds for the ionization chamber but for the Geiger counter it can vary from seconds to greater than 20 seconds

6 0
3 years ago
List and explain the 3 paths natural selection can take.
evablogger [386]

Answer:

1. Stabilizing Selection  

2. Directional Selection  

3. Disruptive Selection  

Explanation:

Stabilizing Selection  

This type of natural selection occurs when there are selective pressures working against two extremes of a trait and therefore the intermediate or “middle” trait is selected for. If we look at a distribution of traits in the population, it is noticeable that a standard distribution is followed:

Example:  For a plant, the plants that are very tall are exposed to more wind and are at risk of being blown over. The plants that are very short fail to get enough sunlight to prosper. Therefore, the plants that are a middle height between the two get both enough sunlight and protection from the wind.

Directional Selection  

This type of natural selection occurs when selective pressures are working in favour of one extreme of a trait. Therefore when looking at a distribution of traits in a population, a graph tends to lean more to one side:

Example: Giraffes with the longest necks are able to reach more leaves to each. Selective pressures will work in the advantage of the longer neck giraffes and therefore the distribution of the trait within the population will shift towards the longer neck trait.

Disruptive Selection  

This type of natural selection occurs when selective pressures are working in favour of the two extremes and against the intermediate trait. This type of selection is not as common. When looking at a trait distribution, there are two higher peaks on both ends with a minimum in the middle as such:

Example: An area that has black, white and grey bunnies contains both black and white rocks. Both the traits for white and black will be favored by natural selection since they both prove useful for camouflage. The intermediate trait of grey does not prove as useful and therefore selective pressures act against the trait.

6 0
3 years ago
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