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katovenus [111]
2 years ago
5

Qual é a estrutura de um vírus?​

Biology
1 answer:
Stolb23 [73]2 years ago
3 0

Un virus tipico de una proteina de cubierta protectora llamada capsida. La for a de esta baria de formas helice simple o icosahedricas hasta estructuras Mas complejas Con cola.

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When your Math teacher was handing out the test, you noticed that your respiration rate and heartbeat increased, your palms got
Papessa [141]

Answer:

My pretest behaviors were triggered by the sympathetic nervous system, while my body returned to its normal state by the way of the parasympathetic nervous system, after the test.

Explanation:

The sympathetic nervous system and the parasympathetic nervous system are part of the autonomic nervous system. The main function of the autonomic nervous system is to regulate the heart, kidneys, and liver which are not under voluntary control. The regulation of the body’s unconscious actions is executed through the sympathetic and the parasympathetic nervous system.

Upon exposure to stressors or threats, the sympathetic nervous system is triggered. Epinephrine and norepinephrine are then released, causing acceleration of the heart, constriction of blood vessels, increase in blood pressure, profuse sweating and other related responses against stress. The sympathetic nervous system controls all these involuntary responses that could be termed “fight-flight-or-freeze” response.

On the other hand, the parasympathetic nervous system initiates what is termed “rest and digest” response, which occurs immediately after the “fight-flight-or-freeze” phase response to stress is over. The body is returned to its normal state by the parasympathetic nervous system. The parasympathetic nervous system releases acetylcholine, which regulates the function of the body during a period of rest or recuperation.  

5 0
3 years ago
Why are lethal dominant alleles so much more rare than lethal recessive alleles?
juin [17]

Lethal alleles cause the death of an organism prenatal or after the birth. Lethal alleles are usually a consequence of a mutation and they can be recessive, dominant or conditional. Since the lethal dominant alleles are harmful whether they are carried in homozygous (e.g.AA) or heterozygous (e.g.Aa) form,  a strong selection against them is present and thus these alleles are much more rare.

5 0
2 years ago
In Asia, human population growth and land development have fragmented forest habitats. Because of this fragmentation, tigers hav
3241004551 [841]

Answer:

Isolation of the tigers´ populations will cause an increase in inbreeding events, meaning a significant reduction in genetic diversity in each population. The loss of genetic variability will cause a reduction in the fitness of individuals. The population's survival will be threatened, with high chances of getting extinct.

Explanation:

Due to technical problems, you will find the complete explanation in the attached files.  

Download pdf
7 0
2 years ago
for which specimen would using a depression slide instead of a regular slide with a coverslip be more useful due to this organis
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8 0
3 years ago
Which is organelle is labeled E
Vadim26 [7]

Answer:

<u>Golgi</u> aka <u>Golgi Apparatus</u>

Explanation:

It is a red layered looking part of the Eukaryotic Plant Cell.

6 0
2 years ago
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