The diagram below shows a portion of the geologic time scale.

Biology

2 answers:

Artist 52 [7]3 years ago

6 0

Answer:

microscopic life appeared on Earth before flowering plants

Explanation:

Gala2k [10]3 years ago

3 0

The answer is microscopic life appeared on Earth before flowering plants. This is because according to the label on the second box, microscopic life appeared 4.0 to 3.5 billion years ago, and this is way before the date 250 to 120 millions years ago indicated on the label on the sixth box the flowering plants appeared on Earth.

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What term is used to describe bacterial cells that can naturally take up dna from their environment?

Maru [420]

<h2>The correct answer is: Competent cells</h2>

Explanation:

Bacterial cells have the capability of incorporating foreign naked DNA or deoxyribonucleic acid fragments from the environment or the exterior of the cell to the interior of the cell. This process is known as Transformation.
The bacterial cells which are able to undergo transformation are called Competent bacterial cells.
Some of the bacterial cells are naturally competent like<em> Bacillus subtilis, Streptocossus pneumoniae</em> while others like <em>Escherishia coli </em>need to be chemically treated to make them artificially competent.
In natural competence, the foreign DNA from the cell exterior is incorporated into the cell interior through specific protein complexes present in the plasma membrane of the bacterial cells.
In artificial competence, the negative charge on foreign DNA is masked by positively charged calcium ions (so that it is not repelled by the negative charge of the lipid bilayer of the bacterial cell plasma membrane) and then small pores are created in the lipid bilayer of the plasma membrane of the bacterial cells by giving a heat shock to the cells. This results in the uptake of the DNA by the bacterial cells.

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3 years ago

In a prokaryotic cell, most ribosomes are

WARRIOR [948]

In a eukaryotic cell, the ribosomes are found in the nucleus but since a prokaryotic cell doesn't have a nucleus, the ribosomes are floating freely in the cytoplasm. Hope this helped :)

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3 years ago

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The genetic information of a cell is duplicated and split to form two daughter cells during which of the following processes? A.

katrin [286]

Answer:

B. Cell division

Explanation:

Cell division is a process where a mother cell splits into two daughter cells.

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If the flasks were left sealed for a week, which one would

Hitman42 [59]

what do the flasks contain?

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What is phosphorus used in the soil for

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Phosphorus is, therefore important in cell division and development of new tissue.
It is also associated with complex energy transformations in the plant. Adding phosphorus to soil low in available phosphorus promotes root growth and winter hardiness, stimulates tillering, and often hastens maturity.

Hopefully this helps :)

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