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k0ka [10]
3 years ago
13

What is the base pairing rule for dna?

Biology
2 answers:
Alik [6]3 years ago
6 0
Adenine pairs with thymine (or uracil), and guanine pairs with cytosine.
sergij07 [2.7K]3 years ago
5 0

Answer:

The basic pairing rule for DNA is: Adenine is paired with Thymine, Guanine is paired with Cytosine and vice versa.

Explanation:

The nitrogenous bases that occur in the DNA molecule are: adenine, guanine, cytosine and thymine.

DNA is characterized by being a very long chain and having a double helix, that is, it has two filaments of polynucleotides interconnected by hydrogen bonds between pairs of specific nitrogenous bases. Adenine binds to thymine, while cytosine binds to guanine and vice versa. This is the basic pairing rule for DNA.

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Match the givin changes in the ecosystem to their causes
poizon [28]

Answer:

The correct answers are:

1. Greenhouse gases: Earth's heat is kept from going away.

Greenhouse gases, particularly CO2 and methane, have properties that allow them to trap heat in the atmosphere. This means that the more of these gases there are in the air, it will be hotter on Earth.

2. Chemicals released into the river—unfit for human consumption.

The chemicals released into rivers pollute the water, making it unfit for human consumption. There are only a few places in the world where there is enough freshwater to go around, so the fact that so many rivers have been poisoned is very worrying.

3. Excessive agricultural land use—forest fragmentation.

People cut down the trees so that there is more land that can be used for farming, As a result of this process, forests are being destroyed to the point of total devastation, and it is likely that this percentage will rise in the coming years as things continue.

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<em>I hope this helps you</em>

<em>:)</em>

4 0
2 years ago
Congo red is called a “pH indicator”. What does this mean?
Ivahew [28]

Answer:

A pH indicator is able to tell what level of pH the substance is at. It can tell how acidic a substance is. If a substance has more hydrogen ions than hydroxide ions then it is acidic. If it has more hydroxide ions that hydrogen ions it is an akaline. the acidic scale is from 0 to 14. lower numbers means more acidic and higher numbers means it is an alkaline.

Explanation:

pH stands for potential Hydrogen.

5 0
3 years ago
4.
Leno4ka [110]
The answer is 5,77*10-8
4 0
3 years ago
Read 2 more answers
The kingdom-level classification system is now preceded by the ________ category, which is based on evolutionary and biochemical
ololo11 [35]

Answer:

Domain

Explanation:

It is common to find in textbooks the classification of living organisms into five kingdoms: Kingdom Monera, Kingdom Protista, Kingdom Fungi, Kingdom Plantae and Kingdom Animalia. It is now known that this classification has some serious flaws and that some kingdoms are no longer considered.

A widely accepted classification today is one that comprises one category above the kingdoms: domains. This classification was proposed by Carl Woese in 1977 and is based on molecular phylogeny data. According to Woese, there are three domains: Archaea Domain, Bacteria Domain, and Eukarya Domain.

3 0
3 years ago
How can you tell the cell in question 8 is undergoing meiosis, not mitosis?
UkoKoshka [18]
This cell must be undergoing meiosis because homologous chromosomes are associated with each other at the metaphase plate which this does not occur in mitosis. During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells.



3 0
3 years ago
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