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GarryVolchara [31]
2 years ago
5

Chemical messengers that influence the activity of the same cell that releases them are __________ chemical messengers, while ch

emical messengers that influence the activity of another cell are ___________ chemical messengers.
Biology
1 answer:
il63 [147K]2 years ago
5 0
Autocrine, and paracrine
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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.
3 0
3 years ago
Which of the following statements is true?
KIM [24]

Secondary consumers receive less energy from the food chain than primary consumers.

Primary consumers are herbivores, meaning they eat the plants that have 100% energy.

Secondary consumers are either omnivores or carnivores. This means that they eat both animals and plants. In the situation that a secondary consumer is a carnivore, the secondary consumer is receiving less energy from the primary consumer.

Hope this helps!

3 0
3 years ago
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Based on Newton’s law of universal gravitation, complete the following table. distance increasesmass increasesdistance decreases
olya-2409 [2.1K]
Gravity increases as mass increases.

Gravity decreases when distance decreases

8 0
3 years ago
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I need help with this please help me!!
iVinArrow [24]

Answer:

i need help with this too somebody help

Explanation:

3 0
3 years ago
Filip, aged 64, was recently diagnosed with Alzheimer's. His medical reports will most likely reveal a diminished production of
UNO [17]

Answer:

Filip's medical report, diagnosed with Alzhaimer's, may reveal a diminished production of acethylcholine.

Explanation:

Alzhaimer's disease is a neurodegenerative condition that causes immediate memory loss, behavioral changes and cognitive impairment, due to neuronal alterations and atrophy.

The neurotransmitter acetylcholine —related to neuronal transmission and body movement— may experience a decrease in its production leading to Alzheimer's, according to the cholinergic hypothesis.

Many therapies and treatments at present are based on the use of drugs to correct the acetylcholine deficit.

Regarding other options:

  • <em>Dopamine: alteration or deficit is related to Parkinson's disease.</em>
  • <em>Gamma aminobutyric acid (GABA): deficiency is not common and is related to a type of congenital and infantile neuropathy. </em>
  • <em>Serotonin: deficit of this neurotransmitter can lead to depression and psychological disorders.</em>
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3 years ago
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