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pishuonlain [190]
3 years ago
13

____ compares the age of fossils to each other based on the layers of rock they are found in?

Biology
2 answers:
hjlf3 years ago
5 0

Answer:

the answer is kick the hi what you doing

ArbitrLikvidat [17]3 years ago
4 0
First one.............
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Gwar [14]

Answer:

There is a simple algebraic formula relating turbidity to optical properties. You do not need Mie theory. It is given in van de Hulst "Light scattering from small particles" (a nice cheap reprint from Dover Press). More easily accessible are any of the Mie calculators avaiable on the Internet, say Miecalc, these will give the exact result.

7 0
3 years ago
How does the concept of a circle relate to cyclins?
baherus [9]

The progression of a cell by the cycle of cell is regulated by the protein family Cyclic

Explanation:

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  • CDK enzymes or ‘cyclin dependent kinase’ gets activated by it that synthesizes the cycle of the cell.
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3 years ago
The lactose (lac) operon in E. coli is an example of a repressed gene when lactose is not available in a cell. In 3-5 sentences
irakobra [83]

Answer:

Please find the detailed explanation of this statement below

Explanation:

Firstly, a repressed gene is a gene whose expression has been inhibited or repressed. The lac operon in E.coli bacteria is a regulatory unit containing structural genes, a single promoter and operator regions. The promoter is the region where the transcription enzyme (RNA polymerase) binds to in order to transcribe the genes in the lac operon. The structural genes in the lac operon can only be expressed in the presence of lactose sugar.

However, in the absence of lactose, LAC REPRESSOR, which is a transcription factor (protein), prevents the binding of RNA polymerase to the PROMOTER region by binding to the OPERATOR region of the lac operon. This inhibits the expression of the lactose genes in the operon.

Note that, the structural genes in the lac operon (lacZ, lacY, lacA) code for proteins that help break down lactose sugar for energy in the E.coli bacteria. Therefore, a bacteria cell with a repressed lac operon will be unable to degrade lactose sugar.

4 0
3 years ago
Help asap giving branlist plsss helppp
bogdanovich [222]

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except option 2 all of them are applied

Explanation:

6 0
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Describe ONE similarity in the interaction between receptor: hormone , antibody: antigen, enzyme: substrate ? PLEASE HELP
nlexa [21]
All mentioned complexes (receptor-hormone, antibody-antigen, enzyme-substate) are involved in a molecular recognition.The molecular recognition involves <span>non-covalent </span> interaction between molecules. To form complex, molecules must be complementary in shape and charges, and usually, they are compared to key and lock. This way, the selectivity and specificity of recognition between molecules are assured.
8 0
3 years ago
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