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skad [1K]
3 years ago
11

Which circumstance can cause negative population growth?

Biology
2 answers:
bekas [8.4K]3 years ago
7 0

Answer:

D

Explanation:

If more specimens are dying than those being born, then we can assume that there will be a decrease in population.

mash [69]3 years ago
6 0

Answer:

Option D, the death rate is higher than the birthrate

Explanation:

Please see the attachment

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zmey [24]

Answer:

D

Explanation:

because they have C, H, O, and N but about 500 naturally occurring amino acids are known and can be classified in many ways. But they have all of the answer that you put down I think

7 0
3 years ago
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After nervous stimulation stops, calcium ions returning to the sarcoplasmic reticulum prevent ACh in the synaptic cleft from con
zhuklara [117]

Answer:

False.

Explanation:  

Neurotransmitter release occurs from the nervous terminal or varicosities in the neuronal axon. When an action potential reaches the nervous terminal, the neurotransmitter is released by exocytose. The molecule binds to its receptor in the postsynaptic neuron, triggering an answer. As long as the signal molecule is in the synaptic space, it keeps linking to its receptor and causing a postsynaptic response. To stop this process the neurotransmitter must be taken out from the synaptic space. There are two mechanisms by which the neurotransmitter can be eliminated:

• Enzymatic degradation/deactivation: There are specific enzymes in the synaptic space, which are in charge of inactivating the neurotransmitter by breaking or degrading it. The enzyme acetylcholinesterase prevents ACh from continuing to stimulate contraction.

• Reuptake: Receptors located in the presynaptic membrane can capture de molecule to store it back in new vesicles for posterior use. These transporters are active transport proteins that easily recognize the neurotransmitter.  

7 0
3 years ago
An explosive eruption by a single volcano can affect?
vodka [1.7K]
The air quality for miles because of all the ash released during the eruption and the lava flow can destroy a lot of plant and animal life on the area suronding the volcano
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5 0
3 years ago
​"peristalsis" is a term that refers to the ____. ​circulation of blood in the blood vessels ​absorption of food in the intestin
Alekssandra [29.7K]
Peristalsis refers  to  the   action   of  the  involuntary   muscle  of  the  digestive  track

  
  Peristalsis  involve  a  series  of  wave  like  muscle  contraction  that  moves  food   to  different  processing  station  in  the   digestive  tracts  and  it  begins in  the  esophagus  when  bolus  of  food  is  swallowed. It  involve involuntary   movement   of    the  longitudinal  and  circular  muscle.
5 0
3 years ago
If you looked at unknown cells under a microscope, what could lead you to correctly conclude that they are prokaryotic cells
Scilla [17]
The main difference between a prokaryotic cell and a eukaryotic cell is that the prokaryotic cell have no true nucleus instead its genetic material is just suspended in its cytoplasm termed as nucleoid. The nucleus when viewed under the microscope is a membrane bound which is easily distingushable compared to the nucleoid. 

Another distinguishing feature is that prokaryotic cells are usually smaller than eukaryotic cells. 
6 0
3 years ago
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