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Tatiana [17]
3 years ago
10

Which of the following is the first principle of cell theory?

Biology
1 answer:
Oksanka [162]3 years ago
4 0
The first part states that all organisms are made of cells.
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What happens if you have an X and a Y chromosome
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If you happen to have an X and Y chromosome, you are biologically classified as male. Testosterone will begin to be produced in puberty, and facial hair will begin to grow, and so on.
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An inadequate secretion of thyroid hormones results in ___________, which is characterized by weight gain and lethargy, while an
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The answer would be <span>hypothyroidism, hyperthyroidism</span>
8 0
3 years ago
The trp and lac operons are regulated in various ways. how do bacteria regulate transcription of these operons?
Vlada [557]

Operon is not transcribed:

-lac operon: lactose absent

-trp operon: tryptophan present

Positive control transcription of Operon does not speed it up:

Lactose and glucose are present, -lac operon

Tryptophan is lacking in the -trp operon.

Operon is transcribed quickly through positive control:

-lac operon: lactose present, glucose not

Only negative control is used to regulate the trp operon. The operon genes are not transcribed when tryptophan is present.

Both positive control and negative control are used to control the lac operon.

Negative control: —Transcription is inhibited when lactose is missing due to the activity of the repressor protein.

—The repressor protein is deactivated and transcription is triggered when lactose is present.

Positive control: —In the absence of glucose, another regulatory protein (CAP) attaches to the lac operon's promoter, speeding up transcription in the presence of lactose.

Learn more about lac operons here:

brainly.com/question/1695549

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7 0
1 year ago
What types of materials are expelled from cells during exocytosis?
aivan3 [116]

"Large molecules such as hormones" types of materials are expelled from cells during exocytosis.

<u>Answer:</u> Option A

<u>Explanation:</u>

The mechanism whereby a cell transfers secretory products to the plasma membrane via the cytoplasm is termed as "exocytosis" while material passage into the cell is known as "endocytosis". Exocytosis is need for removing waste material from cell.

In exocytosis, mechanism huge quantity of molecules which means bulk transport is performed.Responsible for secretion of digestive enzymes and hormones. In this process, membranes-bound secretory vesicle pass to the cell membranes while their material like water-soluble molecule get secreted in the extracellular atmosphere.

5 0
3 years ago
ALOT OF POINTS MARKING POEPLE AS BRAINLIST
alexira [117]

both species had growth in number within the same time period

7 0
3 years ago
Read 2 more answers
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