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Elza [17]
3 years ago
7

Which structure prevents food and liquids from being inhaled when a person swallows

Biology
2 answers:
Shkiper50 [21]3 years ago
5 0

Answer:

epiglottis

Explanation:

slava [35]3 years ago
3 0

Answer:

lungs

Explanation:

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Which labels best complete the flow chart?
julsineya [31]

Answer:

The labels that best complete the flow chart are:

X: Free nitrogen is in the atmosphere and Y: Producers captivate components of nitrogen via their roots.

Explanation:

Soil comprises nitrogen, it is taken up by the plants accompanied by other minerals in the process of taking water from the soil. The presence of nitrogen in the soil takes place by the process of decomposition of decaying and dead substances. The process of decomposition dissociates nitrogen and discharges it within the soil. This nitrogen is eventually taken up by the plants.  

Label X shows that in the air presence of nitrogen takes place in its free state, as it is one of the gases found in abundance in the atmosphere of the Earth.  

5 0
4 years ago
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Which of the following places the steps in the PCR procedure in the correct order?
Marta_Voda [28]

Answer:

Polymerase chain reaction (PCR) test is used to duplicate traces of DNA from any living form, for identification purposes.  The correct sequence is 1, 3, 2; based on the options given.

Explanation:

The steps to be followed for the PCR procedure are:

<em>Denaturation</em>

Option 1.  Involves incubation at 94°C to denature DNA strands into single strands by breaking of weak hydrogen links

<em>Annealing</em>

Option 3.  Temperature is lowered to 60°C to allow primers joining their similar DNA sequences.

<em>Elongation</em>

Option 2.  Incubate at 72°C to promote the extension of the DNA strands, actually extending them.

5 0
3 years ago
Long legs (L) in racing horses is dominant to short legs (l). Good muscle tone (G) is dominant to weak muscle tone (g). Determin
vova2212 [387]

Answer:

See the answer below

Explanation:

Long leg (L) is dominant over short leg (l) and Good muscles (G) is dominant over weak muscles (g).

Heterozygous long leg, weak muscle = Llgg

Heterozygous long leg, strong muscle = LlGg

       Llgg    x    LlGg

Offspring:

2 LLGg - Long leg, strong muscle

4 LlGg -  Long leg, strong muscle

2 LLgg - Long leg, weak muscle

4 Llgg - long leg, weak muscle

2 llGg - short leg, strong muscle

2 llgg - short leg, weak muscle

Ratio of offspring with long leg and strong muscle = 6/16 or 3/8

Ratio of offspring with long leg and weak muscle = 6/16 or 3/8

Ratio of offspring with short leg and strong muscle = 2/16 or 1/8

Ratio of offspring with short leg and weak muscle = 2/16 or 1/8

5 0
3 years ago
What characteristics of carbon atoms allows the formation of all of these compounds?
Andre45 [30]
Covalent bonds allow carbon atoms to form numerous compounds.
5 0
3 years ago
True or false a homologous structure serves no funtion
UNO [17]

Answer:

I think its true ..... ...

7 0
3 years ago
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