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Katarina [22]
2 years ago
7

How are undisturbed rock layers dated

Biology
1 answer:
lesya [120]2 years ago
6 0
Sedimentary rocks form when new sediments are deposited on top of older rock
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Molecules that are present in the membranes of gram-negative bacteria and are the best known pamps are called ________.
miskamm [114]

Molecules that are present in the membranes of gram-negative bacteria and are the best-known pamps are called Bacterial lipopolysaccharides (LPSs).

Bacterial lipopolysaccharides (LPS) are the primary outer surface membrane elements present in almost all Gram-negative bacteria and it act as extremely strong stimulators of the innate or natural immunity in the diverse eukaryotic species ranging from insects to humans.

Eukaryotes are the organisms whose cells contain a nucleus and other membrane-bound organelles. eukaryote, any cell or organism that possesses a clearly defined nucleus. The first eukaryotic cells was evolved about 2 billion years ago. In this Cells with nuclei surrounded by a nuclear envelope with nuclear pores.

Learn more about lipopolysaccharides (LPSs) here

brainly.com/question/13049342

#SPJ4

4 0
1 year ago
Evolutionary relationships between organisms are determined by.
Georgia [21]

Answer:

hope you like it

Explanation:

A molecular clock determines evolutionary relatedness by examining how many mutations or random changes in DNA, there are between two organisms. When we map the relatedness of different organisms, we are creating a phylogenetic tree. At some point, all organisms that are alive today shared a common ancestor.

4 0
2 years ago
Read 2 more answers
Transcription chain elongation is thought to generate ____ supercoils ahead of the transcription bubble and _____ supercoils beh
frosja888 [35]

Answer:

a. positive; negative

Explanation:

Transcription is the process of forming an RNA molecule from a DNA template molecule. In this process, the strands of DNA separate and one serves as a template for RNA, while the other is inactive. At the end of the transcript, the tapes that have been split back together again.

The transcription process is divided into three steps: initiation, stretching and termination

During the stretching phase, transcription chain elongation occurs. In this phase the enzyme called RNA polymerase starts to move through the DNA molecule, unwinding its helix and producing an increasingly lengthened RNA molecule. The already transcribed DNA is rewound almost immediately, recomposing its double helix. This process is called the elongation phase.

During this process, it is believed that positive supercoils  are generated ahead of the transcription bubble and  and the negative supercoils behind it.

6 0
2 years ago
Pls help ASAP
Ugo [173]

Answer:

0.01

Explanation:

1000=10/real

10/1000=real

real=1/100

7 0
2 years ago
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3. Can pure water have colligati e properties?
AleksandrR [38]

Answer: No

Explanation:

the freezing point of salt water is lower than that of pure water, due to the presence of the salt dissolved in the water

7 0
2 years ago
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