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Minchanka [31]
3 years ago
5

How many polynucleotide chains does a DNA molecule have ​

Biology
1 answer:
pychu [463]3 years ago
3 0

two

A DNA molecule consists of two long polynucleotide chains composed of four types of nucleotide subunits.

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The image shows rock strata from three different regions on Earth. Identify all the layers that contain an index fossil
FrozenT [24]

The correct answer is: Layer 1, layer 2, and layer 4 in all three regions.

The index fossils are fossils that are commonly used for identifying a geological period of time, and these fossils are also very wide spread, as well as having a rapid evolutionary trends.

By this picture, we can easily see that even though we have rock strata from different regions, the same layers contain the same fossil, and it is a fossil that also is rapidly evolving so has a minor change in each layer.

7 0
3 years ago
At fertilization, what happens to the sex cells
Tresset [83]
Well the womans egg cells get fertitlize d(a baby will form) from the sperm which came from the guy


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4 0
3 years ago
The recommended diet for soldiers in Arctic conditions is different from the recommended for tropical conditions. What important
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Explanation:

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8 0
3 years ago
Which racial category is most closely related to the eskimo ethnicity?
klasskru [66]

Hi there!

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7 0
2 years ago
Explain the processes that take place in the stroma including the reactants going in and the products produced from these proces
poizon [28]

Stroma, in a biological explanation, the fluid in between grana, where carbohydrate formation reactions occur in the chloroplast of plant cells photosynthesizing.

Explanation:

Part A

 In the bright daylight, the Calvin cycle happens indoors in the stroma. throughout the Calvin cycle, the results  ATP and NADPH are conventional convert molecules of carbonic acid gas into high-energy sugars.

Part B

In the darkness, the Calvin cycle conjointly occurs within the stroma. through the Calvin cycle, the products ATP and NADPH are used to change molecules of CO2 into high-energy sugars.

Part C

There will be a decrease in the products ATP and NADPH if the plants are unbroken within the dark for a protracted time and also the Calvin cycle can't be sustained.

8 0
3 years ago
Read 2 more answers
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