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3 years ago

List three safety precautions you can take before entering the laboratory

1 answer:

mote1985 [20]3 years ago

7 0

The laboratory is full of chemicals and other hazardous substances. So, it is very important to keep all the safety precautions before entering in the laboratory to avoid any mis-happening.

Here are some precautions, which one should take before entering lab:

Before entering the laboratory one must wear all the safety equipment including gloves, goggles, apron, and others.
Make sure you are not wearing any inflammable thing and you are fully covered, as in some laboratory, harmful radiation are also present.
Make sure your hair are tied in properly and the shoes are covered.

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Which cell structure is the gatekeeper, controlling what goes in and out of the cell?

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<span>The cell membrane acts as the gatekeeper of the cell, determining what goes in and out.</span>

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4 years ago

All eukaryotic cells contain small bodies called _________.

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3 years ago

How could an error during transcription affect the protein that is produced?

Ahat [919]

Answer: An error during transcription could produce a shorter protein or induce changes in the protein's sequence.

Explanation: Transcription is the process of single-stranded RNA synthesis from a DNA template (gene). During this process, RNA polymerase reads the DNA template and synthetize RNA, keeping the sequence. The RNA sequence will be reading later by ribosomes and protein will be produced. An error in transcription could produce changes in codons that are sequences of 3 nucleotides that determine aminoacids of the protein, and that would change protein folding and inactive it. Another possible result would be that error in transcription produce a premature stop codon that cause a shorter inactive protein.

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3 years ago

Read 2 more answers

Which of the following is an example of sensors working during homeostasis?

Keith_Richards [23]

D) energy demands triggering a release of glucose.

Notice how the stimulant (low energy supply) triggers a restoration (normalizing) of a normal balance, which in this case is increasing energy supplied (glucose).
This process is called "homeostasis," or maintaining an internal balance.

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3 years ago

Si se aparean especies diferentes como por ejemplo el cruce entre caballos y burros; podemos afirmar que si llegan a tener desce

White raven [17]

Answer:

El híbrido va a ser esteril.

Explanation:

En la cruza entre dos especies distintas, cuando ocurre, existen distintos mecanismos de aislamiento reproductivo, que son barreras que inhiben o interrumpen el flujo génico entre especies distintas. Es decir que no habrá exito reproductivo de estas cruzas. Se trata de caracteres biológicos propios de cada especie que previenen la reproducción con otras especies.

Estos mecanismos de aislamiento reproductivo pueden ser precigóticos o postcigóticos.

1.Pre-copulatorios o pre-cigóticos:

Ecológico o por aislamiento de hábitat;

Estacional o temporal;

Sexual o etológico;

Mecánico;

Por incompatibilidad de gametas.

2. Post-copulatorios o cigóticos:

Inviabilidad del híbrido;

Esterilidad del híbrido;

Híbrido con viabilidad o fertilidad disminuido;

Interacciones citoplasmáticas.

La mula es producto de la cruza entre dos especies distintas: una yegua (Equus ferus caballus) y un burro (Equus africanus asinus). Es un ejemplo de la accion de mecanismo poscigótico, en el cual se forma un híbrido viable esteril. Este ejemplar puede nacer, crecer y sobrevivir, pero que no puede producir gametas funcionales, por lo cual no puede reproducirse.

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3 years ago