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vichka [17]
3 years ago
8

AP Environmental Science

Biology
1 answer:
Masja [62]3 years ago
7 0
What are the other choices ????
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What is a sex linked trait? What is the difference in inheritance between boys and girls for sex linked traits? Describe an exam
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A sex-linked trait is a trait that is carried by the X chromosomes in females but it is not expressed(the phenotype). Females are only carriers because they have two copies of the X chromosome [one of them carries the trait and the other does not]. Males who inherit one copy of the X chromosome often get the trait (because the trait is in either one copy or the other of the X chromosome) and express it while their Y chromosome would became recessive. Thus, only males express sex-linked traits such as hemophilia or color blindness
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2 years ago
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xxMikexx [17]

Answer:

Sugars and phosphates  

Explanation:

DNA is deoxyribonucleic acid.

The backbone is based on a repeated pattern of a sugar group (deoxyribose) and a phosphate group.  

The image below shows one straightened-out strand of DNA with a backbone of alternating sugars and phosphates.

A is wrong. There is no ribose in DNA.

B is wrong. The nucleic acids A, C, G, and T join one strand of DNA to the other.

C is wrong. There is no RNA in DNA.

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3 years ago
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What is true of intercellular signals that do not go through direct connections between cells, such as plasmodesmata?
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The truth about intercellular signals are nucleus which opens up on an ion-linked channel.

Intercellular signals mediates and ionizes radiation which is being induced by stander effects.

Inorder to get to know more about intercellular signal we have to identify the transducers, receptors and the ligands.

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Which of the following statements about otitis media is false?
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(D) It is caused by rhinovirus.

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What is the difference between arbitrary and natural levels? Why do these matter? (4) how do archaeologists recover the smallest
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Arbitrary level refers to the fundamental vertical subdivision of an excavation square, implied only when easily identifiable natural strata are absent and when natural strata are more than ten centimeters thick.  

Natural strata refer to a vertical subdivision of an excavation square, which is reliant on the natural breaks in the sediments in terms of grain size, color, hardness, texture, or other features.  

It is important to know the difference between the arbitrary and natural levels as arbitrary levels could amalgamate artifacts from distinct natural levels, that is, of distinct geologic contexts.  

The archaeologists can recover the smallest ecofacts and artifacts with the assistance of flotation, screening, and bulk matrix processing


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